MKUserTrackingBarButtonItem在放大時崩潰

我正在使用MKUserTrackingBarButtonItem來跟蹤用戶。使用用戶跟蹤欄按鈕時，我無法設置縮放。所以我試圖放大屏幕。並且應用程序在幾個步驟後崩潰。我有一個座標附近，我想用這個來跟蹤用戶相對於座標。爲什麼應用程序崩潰。有沒有更好的方法來做到這一點？任何幫助是極大的讚賞。這是我的代碼： -MKUserTrackingBarButtonItem在放大時崩潰

-(void) viewWillAppear:(BOOL)animated{ 
[super viewWillAppear:animated]; 

self.mapView.delegate = self; 


_coordinate1.latitude = 29.9431438; 
_coordinate1.longitude = -95.5170326; 

self.mapView.showsUserLocation = YES; } 


-(void) viewDidAppear:(BOOL)animated{ 
[super viewDidAppear:animated]; 


    MKCoordinateRegion region = [self regionFromLocations:self.currentLoc]; 

[self displayPoints]; 

MKCoordinateRegion adjustRegion = [self.mapView regionThatFits:region]; 

self.mapView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight); 
[self.mapView setRegion:adjustRegion animated:YES]; } 




- (void)viewDidLoad { 

[super viewDidLoad]; 
MKUserTrackingBarButtonItem *locateMeButton = [[MKUserTrackingBarButtonItem alloc] initWithMapView:self.mapView]; 



NSArray *toolbarItems = [NSArray arrayWithObjects: locateMeButton, 
         nil]; 
self.toolBar.items = toolbarItems; } 





- (void)viewWillDisappear:(BOOL)animated { 

NSLog(@"viewwillDisapear"); 

[self.mapView setUserTrackingMode:MKUserTrackingModeNone]; 

[super viewWillDisappear:animated];} 


-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation { 
// getting current location 
self.currentLoc = userLocation.location.coordinate; 

NSLog(@"loc- %f %f", self.currentLoc.longitude, self.currentLoc.latitude); }

來源

2013-12-18 user3117208

什麼是崩潰錯誤信息？ – Anna

令人驚訝的是沒有錯誤信息。當我調試控制轉到main.h @autoreleasepool {...}並停留在一個循環。 – user3117208

你將不得不做一些調試與NSLogs，斷點，逐行逐行代碼，直到你找出什麼行導致崩潰和原因。嘗試從這開始：http://www.raywenderlich.com/10209/my-app-crashed-now-what-part-1 – Anna

解決通過去除地圖視圖的問題，當視野消失

- （無效）viewWillDisappear：（BOOL）動畫{

[super viewWillDisappear:animated]; 

self.mapView.delegate = nil; 
[self.mapView removeFromSuperview];

}

來源

2014-01-10 22:05:39 user3117208

MKUserTrackingBarButtonItem在放大時崩潰

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