iOS 6 地图未显示提供的经纬度位置
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【中文标题】iOS 6 地图未显示提供的经纬度位置【英文标题】:iOS 6 Map not showing provided lat long location 【发布时间】:2013-08-06 18:38:20 【问题描述】:我在 UIViewController 中使用地图视图,并且我提供了一个默认放大位置,并带有注释。但是变焦不起作用。注释工作正常,但初始缩放到位置不起作用。
我不确定是什么导致了这个问题。任何帮助将不胜感激。
这是我的代码:
- (void)viewDidLoad
[super viewDidLoad];
MKCoordinateRegion myRegion;
//Center
CLLocationCoordinate2D center;
center.latitude = 39.21516;
center.longitude = -76.580806;
//Span
MKCoordinateSpan span;
span.latitudeDelta = 0.02f;
span.longitudeDelta = 0.02f;
myRegion.center = center;
myRegion.span = span;
//set mapView
[self.mapView setRegion:ascRegion animated:YES];
//Annotation
//Create coordinate for annotation
CLLocationCoordinate2D theLocation;
theLocation.latitude = 39.21516;
theLocation.longitude = -76.580806;
MyMapAnnotation * myAnnotation = [MyMapAnnotation alloc];
myAnnotation.coordinate = theLocation;
myAnnotation.title = @"I am here";
myAnnotation.subtitle = @"This is where I am";
[self.mapView addAnnotation:myAnnotation];
【问题讨论】:
【参考方案1】:尝试关注this answer:
- (void)zoomToFitMapAnnotations:(MKMapView *)mapView
if ([mapView.annotations count] == 0) return;
CLLocationCoordinate2D topLeftCoord;
topLeftCoord.latitude = -90;
topLeftCoord.longitude = 180;
CLLocationCoordinate2D bottomRightCoord;
bottomRightCoord.latitude = 90;
bottomRightCoord.longitude = -180;
for(id<MKAnnotation> annotation in mapView.annotations)
topLeftCoord.longitude = fmin(topLeftCoord.longitude, annotation.coordinate.longitude);
topLeftCoord.latitude = fmax(topLeftCoord.latitude, annotation.coordinate.latitude);
bottomRightCoord.longitude = fmax(bottomRightCoord.longitude, annotation.coordinate.longitude);
bottomRightCoord.latitude = fmin(bottomRightCoord.latitude, annotation.coordinate.latitude);
MKCoordinateRegion region;
region.center.latitude = topLeftCoord.latitude - (topLeftCoord.latitude - bottomRightCoord.latitude) * 0.5;
region.center.longitude = topLeftCoord.longitude + (bottomRightCoord.longitude - topLeftCoord.longitude) * 0.5;
region.span.latitudeDelta = fabs(topLeftCoord.latitude - bottomRightCoord.latitude) * 1.1;
// Add a little extra space on the sides
region.span.longitudeDelta = fabs(bottomRightCoord.longitude - topLeftCoord.longitude) * 1.1;
region = [mapView regionThatFits:region];
[mapView setRegion:region animated:YES];
【讨论】:
谢谢!!这似乎是我需要做的,特别是因为我的下一步是包含更多注释并且需要能够查看它们!太棒了,谢谢你的帮助! @shadonar 没问题。几周前我也在做类似的事情。支持我链接到的答案,以便人们可以轻松查看。以上是关于iOS 6 地图未显示提供的经纬度位置的主要内容,如果未能解决你的问题,请参考以下文章