在多个位置之间绘制地图路径
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【中文标题】在多个位置之间绘制地图路径【英文标题】：Draw Map Path among multiple location 【发布时间】：2013-07-08 06:37:06 【问题描述】：我是 iphone 开发新手，我想在 5 个位置之间绘制路径，如何在谷歌地图中绘制路径。 我想要从 location1 到 location2 、 location2 到 location3 、 location3 到 location4 和 location4 到 location5 的路径。
这是我的代码
- (void)viewDidLoad
[super viewDidLoad];
NSDictionary *d1,*d2,*d3,*d4,*d5;
d1=[NSDictionary dictionaryWithObjectsAndKeys:@"location1",@"comments",@"1",@"id",@"23.02941395",@"latitude",@"72.54620655",@"longitude",nil];
d2=[NSDictionary dictionaryWithObjectsAndKeys:@"location2",@"comments",@"2",@"id",@"23.028359049999995",@"latitude",@"72.54537318333334",@"longitude",nil];
d3=[NSDictionary dictionaryWithObjectsAndKeys:@"location3",@"comments",@"3",@"id",@"23.029545",@"latitude",@"72.546036",@"longitude",nil];
d4=[NSDictionary dictionaryWithObjectsAndKeys:@"location4",@"comments",@"4",@"id",@"23.030050",@"latitude",@"72.546226",@"longitude",nil];
d5=[NSDictionary dictionaryWithObjectsAndKeys:@"location5",@"comments",@"5",@"id",@"23.030050",@"latitude",@"72.546022",@"longitude",nil];
self.reports=[NSArray arrayWithObjects:d1,d2,d3,d4,d5,nil];
for (NSDictionary *d in self.reports)
float latitude=[[d valueForKey:@"latitude"] floatValue];
float longitude=[[d valueForKey:@"longitude"] floatValue];
Place* home = [[[Place alloc] init] autorelease];
home.name = [d valueForKey:@"comments"];
home.latitude = latitude;
home.longitude = longitude;
PlaceMark *from = [[[PlaceMark alloc] initWithPlace:home] autorelease];
[mapView addAnnotation:from];
[self centerMap];
-(void) centerMap
MKCoordinateRegion region;
CLLocationDegrees maxLat = -90;
CLLocationDegrees maxLon = -180;
CLLocationDegrees minLat = 120;
CLLocationDegrees minLon = 150;
NSMutableArray *temp=[NSArray arrayWithArray:self.reports];
NSLog(@"%@",temp);
for (int i=0; i<[temp count];i++)
Place* home = [[[Place alloc] init] autorelease];
home.latitude = [[[temp objectAtIndex:i] valueForKey:@"latitude"]floatValue];
home.longitude =[[[temp objectAtIndex:i] valueForKey:@"longitude"]floatValue];
PlaceMark* from = [[[PlaceMark alloc] initWithPlace:home] autorelease];
CLLocation* currentLocation = (CLLocation*)from ;
if(currentLocation.coordinate.latitude > maxLat)
maxLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.latitude < minLat)
minLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.longitude > maxLon)
maxLon = currentLocation.coordinate.longitude;
if(currentLocation.coordinate.longitude < minLon)
minLon = currentLocation.coordinate.longitude;
region.center.latitude = (maxLat + minLat) / 2;
region.center.longitude = (maxLon + minLon) / 2;
region.span.latitudeDelta = maxLat - minLat;
region.span.longitudeDelta = maxLon - minLon;
[mapView setRegion:region animated:YES];
- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
if (annotation == mapView.userLocation)
return nil;
MKPinAnnotationView *pin = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier: @"asdf"];
if (pin == nil)
pin = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier: @"asdf"] autorelease];
else
pin.annotation = annotation;
pin.userInteractionEnabled = YES;
UIButton *disclosureButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[disclosureButton setFrame:CGRectMake(0, 0, 30, 30)];
pin.rightCalloutAccessoryView = disclosureButton;
pin.pinColor = MKPinAnnotationColorRed;
//pin.animatesDrop = YES;
[pin setEnabled:YES];
[pin setCanShowCallout:YES];
return pin;
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
NSString *strTitle = [NSString stringWithFormat:@"%@",[view.annotation title]];
NSMutableDictionary *d;
NSMutableArray *temp=[NSArray arrayWithArray:self.reports];
for (int i = 0; i<[temp count]; i++)
d = (NSMutableDictionary*)[temp objectAtIndex:i];
NSString *strAddress = [NSString stringWithFormat:@"%@",[d valueForKey:@"comments"]];
if([strAddress isEqualToString:strTitle])
[self presentModalViewController:self.nxtDetailsVCtr animated:YES];
[self.nxtDetailsVCtr.lblDetail setText:strAddress];
break;
【问题讨论】：
作为参考，我有这段代码，但我想在其中绘制路径。 sugartin-info.googlecode.com/files/MapkitDemo.zip 【参考方案1】：您可以使用NVPlolineAnnotation 在地图内画线。这是Source Code。
【讨论】：
【参考方案2】：需要框架
QuartzCore.framework CoreLocation.framework MapKit.framework
需要的文件
JSONKit.h JSONKit.m
在 ARC 的情况下，在 JSON 的编译源中设置 -fno-objc-arc。
在头文件中
__block IBOutlet MKMapView *__mapView;
NSArray* routes;
MKPointAnnotation *startLocation;
MKPointAnnotation *endLocation;
MKPolyline *polyLine;
实现一段代码...
- (void)viewDidLoad
// [__mapView setShowsUserLocation:YES];
[__mapView setZoomEnabled:YES];
[__mapView setScrollEnabled:YES];
[__mapView setMapType:MKMapTypeStandard];
[__mapView setDelegate:self];
routes=[[NSArray alloc] init];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
- (IBAction)drawPath:(id)sender
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void)
//Background Thread
[self showRouteFrom:startLocation to:endLocation];
dispatch_async(dispatch_get_main_queue(), ^(void)
//Run UI Updates
if (polyLine)
[__mapView setVisibleMapRect:[polyLine boundingMapRect]];
[__mapView addOverlay:polyLine];
[self centerMap];
NSLog(@"drawing path completed");
);
);
-(void) showRouteFrom: (id<MKAnnotation>)source to:(id<MKAnnotation>)destination;
if(routes)
[__mapView removeAnnotations:[__mapView annotations]];
[__mapView addAnnotation:source];
[__mapView addAnnotation:destination];
NSLog(@"source title is %@",source.title);
NSLog(@"destination title is %@",destination.title);
routes = [self calculateRoutesFrom:source.coordinate to:destination.coordinate];
NSLog(@"routes are %@",routes);
NSInteger numberOfSteps = routes.count;
CLLocationCoordinate2D coordinates[numberOfSteps];
for (NSInteger index = 0; index < numberOfSteps; index++)
CLLocation *location = [routes objectAtIndex:index];
CLLocationCoordinate2D coordinate = location.coordinate;
coordinates[index] = coordinate;
polyLine = [MKPolyline polylineWithCoordinates:coordinates count:numberOfSteps];
NSLog(@"poly line to be added as ovelay is %@",polyLine);
-(NSArray*) calculateRoutesFrom:(CLLocationCoordinate2D) f to: (CLLocationCoordinate2D) t
NSString* saddr = [NSString stringWithFormat:@"%f,%f", f.latitude, f.longitude];
NSString* daddr = [NSString stringWithFormat:@"%f,%f", t.latitude, t.longitude];
NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false&avoid=highways&mode=",saddr,daddr];
NSLog(@"Fired API %@",apiUrlStr);
NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];
NSError* error = nil;
NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
NSDictionary *dic=[apiResponse objectFromJSONString];
if (dic!=nil)
NSArray *routPoints=[[NSArray alloc] initWithArray:[dic valueForKey:@"routes"]];
NSDictionary *polylineOverview=[[routPoints objectAtIndex:0] valueForKey:@"overview_polyline"];
NSString *polylinePoints = [polylineOverview objectForKey:@"points"];
return [self decodePolyLine:[polylinePoints mutableCopy]];
return nil;
- (NSMutableArray *)decodePolyLine: (NSMutableString *)encoded
[encoded replaceOccurrencesOfString:@"\\\\" withString:@"\\" options:NSLiteralSearch range:NSMakeRange(0, [encoded length])];
NSInteger len = [encoded length];
NSInteger index = 0;
NSMutableArray *array = [[NSMutableArray alloc] init];
NSInteger lat=0;
NSInteger lng=0;
while (index < len)
NSInteger b;
NSInteger shift = 0;
NSInteger result = 0;
do
b = [encoded characterAtIndex:index++] - 63;
result |= (b & 0x1f) << shift;
shift += 5;
while (b >= 0x20);
NSInteger dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do
b = [encoded characterAtIndex:index++] - 63;
result |= (b & 0x1f) << shift;
shift += 5;
while (b >= 0x20);
NSInteger dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
lng += dlng;
NSNumber *latitude = [[NSNumber alloc] initWithFloat:lat * 1e-5];
NSNumber *longitude = [[NSNumber alloc] initWithFloat:lng * 1e-5];
//printf("[%f,", [latitude doubleValue]);
//printf("%f]", [longitude doubleValue]);
CLLocation *loc = [[CLLocation alloc] initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]];
[array addObject:loc];
return array;
#pragma mark- MKMapView delegate method
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
MKPolylineView *polylineView = [[MKPolylineView alloc] initWithPolyline:overlay];
polylineView.strokeColor = [UIColor purpleColor];
polylineView.lineWidth = 5.0;
NSLog(@"polyline in viewFor overlay: %@",polylineView);
return polylineView;
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
NSLog(@"did update user location called ");
MKCoordinateRegion region;
region.span.latitudeDelta = .005;
region.span.longitudeDelta = .005;
region.center = userLocation.coordinate;
[mapView setRegion:region animated:YES];
-(void) centerMap
MKCoordinateRegion region;
CLLocationDegrees maxLat = -90.0;
CLLocationDegrees maxLon = -180.0;
CLLocationDegrees minLat = 90.0;
CLLocationDegrees minLon = 180.0;
for(int idx = 0; idx < routes.count; idx++)
CLLocation* currentLocation = [routes objectAtIndex:idx];
if(currentLocation.coordinate.latitude > maxLat)
maxLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.latitude < minLat)
minLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.longitude > maxLon)
maxLon = currentLocation.coordinate.longitude;
if(currentLocation.coordinate.longitude < minLon)
minLon = currentLocation.coordinate.longitude;
region.center.latitude = (maxLat + minLat) / 2.0;
region.center.longitude = (maxLon + minLon) / 2.0;
region.span.latitudeDelta = 0.01;
region.span.longitudeDelta = 0.01;
region.span.latitudeDelta = ((maxLat - minLat)<0.0)?100.0:(maxLat - minLat);
region.span.longitudeDelta = ((maxLon - minLon)<0.0)?100.0:(maxLon - minLon);
[__mapView setRegion:region animated:YES];
#pragma mark- UITextField delegate method
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
[self.view bringSubviewToFront:textField];
CGRect rect=textField.frame;
[[NSUserDefaults standardUserDefaults] setValue:NSStringFromCGRect(rect) forKey:@"textFieldRect"];
rect.origin.y=self.view.frame.size.height-260;
[UIView animateWithDuration:0.3 animations:^
[textField setFrame:rect];
];
return YES;
- (BOOL)textFieldShouldReturn:(UITextField *)textField
NSString *rectStr=[[NSUserDefaults standardUserDefaults] valueForKey:@"textFieldRect"];
NSArray *rectArray=[rectStr componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@", "]];
CGRect rect;
rect.origin.x=[[rectArray objectAtIndex:2] floatValue];
rect.origin.y=[[rectArray objectAtIndex:4] floatValue];
rect.size.width=[[rectArray objectAtIndex:8] floatValue];
rect.size.height=[[rectArray objectAtIndex:10] floatValue];
[UIView animateWithDuration:0.3 animations:^
[textField setFrame:rect];
];
[textField resignFirstResponder];
return YES;
- (void)textFieldDidEndEditing:(UITextField *)textField
NSDictionary *locationDic=[self getLatLongOfPlace:[textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
NSDictionary *latLongDic=[[[[[locationDic valueForKey:@"results"] objectAtIndex:0] valueForKey:@"geometry"]valueForKey:@"viewport"] valueForKey:@"northeast"];
if (textField.tag==0)
startLocation=[[MKPointAnnotation alloc] init];
[startLocation setCoordinate:CLLocationCoordinate2DMake([[latLongDic valueForKey:@"lat"] floatValue], [[latLongDic valueForKey:@"lng"] floatValue])];
startLocation.title=[textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
else
endLocation=[[MKPointAnnotation alloc] init];
[endLocation setCoordinate:CLLocationCoordinate2DMake([[latLongDic valueForKey:@"lat"] floatValue], [[latLongDic valueForKey:@"lng"] floatValue])];
endLocation.title=[textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSLog(@"object at index is viewport %@",[[[[[locationDic valueForKey:@"results"] objectAtIndex:0] valueForKey:@"geometry"]valueForKey:@"viewport"] valueForKey:@"northeast"]);
#pragma mark Getting lat long from place name.
-(NSDictionary*)getLatLongOfPlace:(NSString*)place
NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?address=%@&sensor=true",place];
NSLog(@"Fired URL:- %@",apiUrlStr);
NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];
NSError* error = nil;
NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
NSDictionary *dic=[apiResponse objectFromJSONString];
return dic;
这里是SampleCode我做的
注意：--- 如果示例对您不起作用，请在 viewDidLoad 方法中输入这一行
// [__mapView setShowsUserLocation:YES];
截图
【讨论】：
我不想在两个位置之间绘制路径，我想在多个位置之间绘制路径...如果您有任何示例代码，请给我。 如果你有 5 个位置，然后使用从 1 到 2、2 到 3、3 到 4 和 3 到 5 的路径进行绘制。就是这样。只需调用 showRouteFrom 即可通过发送位置进行绘制。源 lat long 和目标 lat long 作为参数【参考方案3】： #import "ViewController.h"
#import "JSONKit.h"
@interface ViewController ()
@end
@implementation ViewController
NSMutableArray *locationarry ;
NSMutableDictionary * citywiselatlong ;
- (void)viewDidLoad
locationarry = [[NSMutableArray alloc]initWithObjects:@"Ahmedabad",@"Rajkot",@"Baroda",@"Surat", nil];
citywiselatlong = [[NSMutableDictionary alloc]init];
[self locationfind];
NSMutableString* TotalXMLString = [[NSMutableString alloc]init];
[TotalXMLString appendFormat:@"http://maps.googleapis.com/maps/api/distancematrix/json?origins="];
[TotalXMLString appendFormat:@"%@,%@&destinations=",[[citywiselatlong valueForKey:[locationarry objectAtIndex:0]] valueForKey:@"lat"] ,[[citywiselatlong valueForKey:[locationarry objectAtIndex:0]] valueForKey:@"lng"]];
for (int i = 1; i < [locationarry count]; i++)
[TotalXMLString appendFormat:@"%@,%@",[[citywiselatlong valueForKey:[locationarry objectAtIndex:i]] valueForKey:@"lat"] ,[[citywiselatlong valueForKey:[locationarry objectAtIndex:i]] valueForKey:@"lng"]];
if (i != [locationarry count] -1 )
[TotalXMLString appendFormat:@"|"];
else
[TotalXMLString appendFormat:@"&mode=driving&sensor=false"];
NSURL* apiUrl = [NSURL URLWithString:[TotalXMLString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]];
NSError* error = nil;
NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
NSDictionary *dic=[apiResponse objectFromJSONString];
NSLog(@"%@",dic);
NSMutableArray * distance = [[NSMutableArray alloc]initWithArray:[[[[dic valueForKey:@"rows"] objectAtIndex:0] valueForKey:@"elements"]valueForKey:@"distance"]];
for (int j= 0 ; j < [distance count]; j++)
NSMutableDictionary *data = [[NSMutableDictionary alloc]initWithDictionary:[distance objectAtIndex:j]];
NSLog(@"%@",distance);
[__mapView setShowsUserLocation:YES];
[__mapView setZoomEnabled:YES];
[__mapView setScrollEnabled:YES];
[__mapView setMapType:MKMapTypeHybrid];
[__mapView setDelegate:self];
routes=[[NSArray alloc] init];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
- (void)didReceiveMemoryWarning
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
#pragma mark- MKMapView delegate method
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
MKPolylineView *polylineView = [[MKPolylineView alloc] initWithPolyline:overlay];
polylineView.strokeColor = [UIColor purpleColor];
polylineView.lineWidth = 5.0;
NSLog(@"polyline in viewFor overlay: %@",polylineView);
return polylineView;
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
NSLog(@"did update user location called ");
MKCoordinateRegion region;
region.span.latitudeDelta = .005;
region.span.longitudeDelta = .005;
region.center = userLocation.coordinate;
[mapView setRegion:region animated:YES];
- (NSMutableArray *)decodePolyLine: (NSMutableString *)encoded
[encoded replaceOccurrencesOfString:@"\\\\" withString:@"\\" options:NSLiteralSearch range:NSMakeRange(0, [encoded length])];
NSInteger len = [encoded length];
NSInteger index = 0;
NSMutableArray *array = [[NSMutableArray alloc] init];
NSInteger lat=0;
NSInteger lng=0;
while (index < len)
NSInteger b;
NSInteger shift = 0;
NSInteger result = 0;
do
b = [encoded characterAtIndex:index++] - 63;
result |= (b & 0x1f) << shift;
shift += 5;
while (b >= 0x20);
NSInteger dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do
b = [encoded characterAtIndex:index++] - 63;
result |= (b & 0x1f) << shift;
shift += 5;
while (b >= 0x20);
NSInteger dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
lng += dlng;
NSNumber *latitude = [[NSNumber alloc] initWithFloat:lat * 1e-5];
NSNumber *longitude = [[NSNumber alloc] initWithFloat:lng * 1e-5];
//printf("[%f,", [latitude doubleValue]);
//printf("%f]", [longitude doubleValue]);
CLLocation *loc = [[CLLocation alloc] initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]];
[array addObject:loc];
return array;
-(NSArray*) calculateRoutesFrom:(CLLocationCoordinate2D) f to: (CLLocationCoordinate2D) t
NSString* saddr = [NSString stringWithFormat:@"%f,%f", f.latitude, f.longitude];
NSString* daddr = [NSString stringWithFormat:@"%f,%f", t.latitude, t.longitude];
NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false&avoid=highways&mode=",saddr,daddr];
NSLog(@"Fired API %@",apiUrlStr);
NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];
NSError* error = nil;
NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
NSDictionary *dic=[apiResponse objectFromJSONString];
if (dic!=nil)
NSArray *routPoints=[[NSArray alloc] initWithArray:[dic valueForKey:@"routes"]];
NSDictionary *polylineOverview=[[routPoints objectAtIndex:0] valueForKey:@"overview_polyline"];
NSString *polylinePoints = [polylineOverview objectForKey:@"points"];
return [self decodePolyLine:[polylinePoints mutableCopy]];
return nil;
- (IBAction)drawPath:(id)sender
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void)
//Background Thread
[self showRouteFrom:startLocation to:endLocation];
dispatch_async(dispatch_get_main_queue(), ^(void)
//Run UI Updates
if (polyLine)
[__mapView setVisibleMapRect:[polyLine boundingMapRect]];
[__mapView addOverlay:polyLine];
NSLog(@"drawing path completed");
);
);
-(void) showRouteFrom: (id<MKAnnotation>)source to:(id<MKAnnotation>)destination;
routes = [self calculateRoutesFrom:source.coordinate to:destination.coordinate];
NSLog(@"routes are %@",routes);
NSInteger numberOfSteps = routes.count;
CLLocationCoordinate2D coordinates[numberOfSteps];
for (NSInteger index = 0; index < numberOfSteps; index++)
CLLocation *location = [routes objectAtIndex:index];
CLLocationCoordinate2D coordinate = location.coordinate;
coordinates[index] = coordinate;
polyLine = [MKPolyline polylineWithCoordinates:coordinates count:numberOfSteps];
[polyLineArray addObject:polyLine];
- (IBAction)drawMultiple:(id)sender
polyLineArray=[[NSMutableArray alloc] init];
MKPointAnnotation *start=[[MKPointAnnotation alloc] init];
MKPointAnnotation *end=[[MKPointAnnotation alloc] init];
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void)
//Background Thread
for (int i=0;i<locationarry.count-1;i++)
NSArray *part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:i] componentsSeparatedByString:@","]];
NSDictionary *dic=[citywiselatlong objectForKey:[part objectAtIndex:0]];
[start setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"lat"] floatValue], [[dic valueForKey:@"lng"] floatValue])];
part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:i +1 ] componentsSeparatedByString:@","]];
dic=[citywiselatlong objectForKey:[part objectAtIndex:0]];
[end setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"lat"] floatValue], [[dic valueForKey:@"lng"] floatValue])];
[self showRouteFrom:start to:end];
dispatch_async(dispatch_get_main_queue(), ^(void)
//Run UI Updates
NSArray *part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:0] componentsSeparatedByString:@","]];
NSDictionary *tempDic=[[NSDictionary alloc] initWithDictionary:[citywiselatlong objectForKey:[part objectAtIndex:0]]];
[start setCoordinate:CLLocationCoordinate2DMake([[tempDic valueForKey:@"lat"] floatValue], [[tempDic valueForKey:@"lng"] floatValue])];
if (polyLine)
[__mapView setVisibleMapRect:[polyLine boundingMapRect]];
for (MKPolyline *pLine in polyLineArray)
[__mapView addOverlay:pLine];
for (int i =0 ; i< [locationarry count]; i ++)
NSArray *part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:i] componentsSeparatedByString:@","]];
NSDictionary *dic=[citywiselatlong objectForKey:[part objectAtIndex:0]];
MKPointAnnotation *first=[[MKPointAnnotation alloc] init];
MKPointAnnotation *second=[[MKPointAnnotation alloc] init];
[first setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"lat"] floatValue], [[dic valueForKey:@"lng"] floatValue])];
if(i+1<[locationarry count])
NSArray *part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:i + 1] componentsSeparatedByString:@","]];
dic=[citywiselatlong objectForKey:[part objectAtIndex:0]];
[second setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"lat"] floatValue], [[dic valueForKey:@"lng"] floatValue])];
else
NSArray *part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:i] componentsSeparatedByString:@","]];
dic=[citywiselatlong objectForKey:[part objectAtIndex:0]];;
[second setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"lat"] floatValue], [[dic valueForKey:@"lng"] floatValue])];
if (i==0)
[__mapView addAnnotation:first];
[__mapView addAnnotation:second];
else
[__mapView addAnnotation:second];
NSLog(@"drawing path completed");
);
);
-(void) centerMap
MKCoordinateRegion region;
CLLocationDegrees maxLat = -90.0;
CLLocationDegrees maxLon = -180.0;
CLLocationDegrees minLat = 90.0;
CLLocationDegrees minLon = 180.0;
for(int idx = 0; idx < routes.count; idx++)
CLLocation* currentLocation = [routes objectAtIndex:idx];
if(currentLocation.coordinate.latitude > maxLat)
maxLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.latitude < minLat)
minLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.longitude > maxLon)
maxLon = currentLocation.coordinate.longitude;
if(currentLocation.coordinate.longitude < minLon)
minLon = currentLocation.coordinate.longitude;
region.center.latitude = (maxLat + minLat) / 2.0;
region.center.longitude = (maxLon + minLon) / 2.0;
region.span.latitudeDelta = 0.01;
region.span.longitudeDelta = 0.01;
region.span.latitudeDelta = ((maxLat - minLat)<0.0)?100.0:(maxLat - minLat);
region.span.longitudeDelta = ((maxLon - minLon)<0.0)?100.0:(maxLon - minLon);
[__mapView setRegion:region animated:YES];
#pragma mark- UITextField delegate method
-(void)locationfind
for (int i = 0; i < [locationarry count]; i++)
NSDictionary *locationDic=[self getLatLongOfPlace:[[locationarry objectAtIndex:i] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
NSDictionary *latLongDic=[[[[locationDic valueForKey:@"results"] objectAtIndex:0] valueForKey:@"geometry"]valueForKey:@"location"];
NSArray *part = [[NSArray alloc]initWithArray:[[locationarry objectAtIndex:i] componentsSeparatedByString:@","]];
[citywiselatlong setObject:latLongDic forKey:[part objectAtIndex:0]];
NSLog(@"%@",citywiselatlong);
#pragma mark Getting lat long from place name.
-(NSDictionary*)getLatLongOfPlace:(NSString*)place
NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?address=%@&sensor=true",place];
NSLog(@"Fired URL:- %@",apiUrlStr);
NSURL* apiUrl = [NSURL URLWithString:[apiUrlStr stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]];
NSError* error = nil;
NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
NSDictionary *dic=[apiResponse objectFromJSONString];
return dic;
@end
【讨论】：
【参考方案4】：对于绘制多个点，您可以将其用作
需要在头文件中声明可变数组
NSMutableArray *polyLineArray;
实现文件需要小改动，因为 ===
-(void) showRouteFrom: (id<MKAnnotation>)source to:(id<MKAnnotation>)destination;
NSLog(@"source title is %@",source.title);
NSLog(@"destination title is %@",destination.title);
routes = [self calculateRoutesFrom:source.coordinate to:destination.coordinate];
NSLog(@"routes are %@",routes);
NSInteger numberOfSteps = routes.count;
CLLocationCoordinate2D coordinates[numberOfSteps];
for (NSInteger index = 0; index < numberOfSteps; index++)
CLLocation *location = [routes objectAtIndex:index];
CLLocationCoordinate2D coordinate = location.coordinate;
coordinates[index] = coordinate;
polyLine = [MKPolyline polylineWithCoordinates:coordinates count:numberOfSteps];
[polyLineArray addObject:polyLine];
// NSLog(@"poly line to be added as ovelay is %@",polyLine);
- (IBAction)drawMultiple:(id)sender
polyLineArray=[[NSMutableArray alloc] init];
NSDictionary *kolkata,*delhi,*chennai,*mumbai,*pune;
kolkata=[NSDictionary dictionaryWithObjectsAndKeys:@"location1",@"comments",@"1",@"id",@"23.0083321",@"latitude",@"88.54276659999",@"longitude",nil];
delhi=[NSDictionary dictionaryWithObjectsAndKeys:@"location2",@"comments",@"2",@"id",@"28.889816",@"latitude",@"77.3418147",@"longitude",nil];
chennai=[NSDictionary dictionaryWithObjectsAndKeys:@"location3",@"comments",@"3",@"id",@"13.23339843",@"latitude",@"80.3322912",@"longitude",nil];
mumbai=[NSDictionary dictionaryWithObjectsAndKeys:@"location4",@"comments",@"4",@"id",@"19.2716339",@"latitude",@"72.9864994",@"longitude",nil];
pune=[NSDictionary dictionaryWithObjectsAndKeys:@"location5",@"comments",@"5",@"id",@"18.6346965",@"latitude",@"73.9894867",@"longitude",nil];
NSArray *arrayOfLocations=[[NSArray alloc] initWithObjects:kolkata,delhi,chennai,mumbai,pune,nil];
MKPointAnnotation *start=[[MKPointAnnotation alloc] init];
MKPointAnnotation *end=[[MKPointAnnotation alloc] init];
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void)
//Background Thread
for (int i=0;i<arrayOfLocations.count-1;i++)
NSDictionary *dic=[arrayOfLocations objectAtIndex:i];
[start setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"latitude"] floatValue], [[dic valueForKey:@"longitude"] floatValue])];
dic=[arrayOfLocations objectAtIndex:i+1];
[end setCoordinate:CLLocationCoordinate2DMake([[dic valueForKey:@"latitude"] floatValue], [[dic valueForKey:@"longitude"] floatValue])];
[self showRouteFrom:start to:end];
dispatch_async(dispatch_get_main_queue(), ^(void)
//Run UI Updates
NSDictionary *tempDic=[[NSDictionary alloc] initWithDictionary:[arrayOfLocations objectAtIndex:0]];
[start setCoordinate:CLLocationCoordinate2DMake([[tempDic valueForKey:@"latitude"] floatValue], [[tempDic valueForKey:@"longitude"] floatValue])];
[__mapView addAnnotation:start];
[__mapView addAnnotation:end];
if (polyLine)
[__mapView setVisibleMapRect:[polyLine boundingMapRect]];
for (MKPolyline *pLine in polyLineArray)
[__mapView addOverlay:pLine];
NSLog(@"drawing path completed");
);
);
If u need sample code here it is
输出是--------
【讨论】：
谢谢这正是我想要的......现在我想在所有位置上放置注释。【参考方案5】：这里使用BreadCrumbs是示例代码..非常有用...您可以根据您的要求自定义代码
https://developer.apple.com/library/ios/samplecode/Breadcrumb/Introduction/Intro.html
【讨论】：
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