如何使 MKMapView 从顶部进入

Posted 2023-03-05

【中文标题】如何使 MKMapView 从顶部进入

【英文标题】：How to make a MKMapView come in from the top

【发布时间】：2016-05-01 12:16:08

【问题描述】：

我有一个带有基本 MKAnnoation 的普通 MKMap 视图，我想要完成的是我的注释在英国并且 MKCoordinateSpan 是 0.05，但我希望 MKMapView 从整个英国的视图开始并放大到注释.

【参考方案1】：

- (void)viewWillAppear:(BOOL)animated 
    [super viewWillAppear:animated];
    /* set here the region from where map will be zooming; */
    [self.mapView setRegion:MKCoordinateRegionForMapRect(MKMapRectWorld) animated:NO];


- (void)viewDidAppear:(BOOL)animated 
    [super viewDidAppear:animated];
    /* set here your end point of zooming */
    CLLocationCoordinate2D zoomLocation;
    zoomLocation.latitude = 39.281516;
    zoomLocation.longitude= -76.580806;

    [self.mapView setCenterCoordinate:zoomLocation animated:YES];
    CLLocationDistance locationDistance = [self locationDistance:0.5];
    MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, locationDistance, locationDistance);
    [self.mapView setRegion:viewRegion animated:YES];


- (CLLocationDistance )locationDistance:(CGFloat )value 
    return 1609.344 *value;