我想在自定义坐标上缩放MKMapView
。所以我使用以下代码。
CLLocationCoordinate2D myCurrentLocationCordinate = CLLocationCoordinate2DMake(latitude, longtitude);
[myMapView setCenterCoordinate:myCurrentLocationCordinate animated:YES];
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(myCurrentLocationCordinate, 500, 500);
MKCoordinateRegion adjustedRegion = [myMapView regionThatFits:viewRegion];
[myMapView setRegion:adjustedRegion animated:YES];
但是我的应用程序在setRegion:
方法上随机崩溃。并在崩溃时获取此日志: -
adjustRegion description:(MKCoordinateRegion)adjustedRegion = {
center =(纬度= 23.066432958888399,经度= 72.531898498535213)span =(latitudeDelta = 0.0051205743267423998,longitudeDelta = 0.0048793707173899747)}
有时也会出现以下错误: -
*由于未捕获的异常'NSGenericException'而终止应用, reason:'(null)必须在canShowCallout为YES时实现title 相应的视图>' * 第一次抛出调用堆栈:(0x18e8b91b8 0x18d2f055c 0x19ab76244 0x19abb2c74 0x19ab74d44 0x19ab8db58 0x19477c7dc 0x19abb041c 0x19abb0290 0x19abb1588 0x1001ae010 0x1001ad318 0x101265258 0x101265218 0x101275080 0x101274b78 0x18d94b2a0 0x18d94ad8c) libc ++ abi.dylib:以未捕获的类型异常终止 NSException
我肯定不是为什么它会随机崩溃。如果有任何其他适当的解决方案来缩放自定义坐标上的MKMapView
,请告诉我。
任何帮助都将不胜感激。
答案 0 :(得分:2)
我也遇到了同样的问题,但是使用了这个
解决了 CLLocationCoordinate2D startCoord = CLLocationCoordinate2DMake(latitudeAPI, longtitudeAPI);
[myMapView setRegion:MKCoordinateRegionMakeWithDistance(myCurrentLocationCordinate, 500.0, 500.0) animated:NO];
无需使用此行
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(myCurrentLocationCordinate, 500, 500);
MKCoordinateRegion adjustedRegion = [myMapView regionThatFits:viewRegion];
希望它有效并且感谢 @Firoze Lafeer 来帮助我解决这个问题。
答案 1 :(得分:2)
我以这种方式处理我的mapView缩放。你能这样试试吗?
CLLocationCoordinate2D zoomLocation = CLLocationCoordinate2DMake(40.741168, 30.333555);
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5* 1609.344, 0.5* 1609.344);
[self.myMapview setRegion:viewRegion animated:YES];
[self.myMapview setDelegate:self];