locationManager startUpdatingLocation崩溃应用程序

Question

这是我第一次开发应用程序。所以我希望用户的坐标以及地址在用户按下视图控制器中的'查看位置'按钮时显示。

我已经编码了所有内容，当我在模拟器中按下按钮时，它突然关闭，并将我指向IBAction按钮方法中的[newlocationManager startUpdatingLocation]代码。它说“线程：1断点1.1”。这是什么意思，我该如何解决它？

这是我的接口文件：

@interface FirstViewController : UIViewController <CLLocationManagerDelegate> 

@property (weak, nonatomic) IBOutlet UILabel *latitudeLabel; 
@property (weak, nonatomic) IBOutlet UILabel *longitudeLabel; 
@property (weak, nonatomic) IBOutlet UILabel *addressLabel; 

- (IBAction)getCurrentLocation:(id)sender; 

@end 

，这是我实现文件：

#import "FirstViewController.h" 

@interface FirstViewController() 

@end 

#pragma - UIViewController // Categorizes a group of methods 

@implementation FirstViewController{ 
    //The CCLocationManager is the object that provides the location data and the methods. 
    CLLocationManager * newlocationManager; 
} 

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    // Do any additional setup after loading the view, typically from a nib. 

    newlocationManager = [[CLLocationManager alloc] init]; 
} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

#pragma - IBAction // Categorizes a group of methods 

- (IBAction)getCurrentLocation:(id)sender { 
    newlocationManager.delegate = self; 
    newlocationManager.desiredAccuracy = kCLLocationAccuracyBest; 

    [newlocationManager startUpdatingLocation]; 
} 

#pragma - CLLocationManagerDelegate // Categorizes a group of methods 

// Informs the delegate that it was unable to get location data. Displays error pop-up alert. 
- (void) locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{ 
    // The error why location could not be retreived 
    NSLog(@"didFailWithError: %@", error); 
    UIAlertView *errorAlert = [[UIAlertView alloc] 
           initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
    [errorAlert show]; 
} 

- (void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{ 
    // Last object of the 'locations' array contains the most recent location. newLocation now points to the last object. 
    CLLocation *newLocation = [locations lastObject]; 
    CLLocation *oldLocation; 

    // Check the size of the NSArray (locations). If it contains a single object, just set oldLocation to nil. 
    // If it contains more than 1 object then store that in oldLocation. 

    if (locations.count>1){ 
     oldLocation = [locations objectAtIndex:(locations.count - 2)]; 
    } 
    else 
     oldLocation = nil; 

    NSLog(@"didUpdateToLocation %@ from %@", newLocation, oldLocation); 

    if (newLocation != nil){ 
    _longitudeLabel.text = [NSString stringWithFormat:@"%.8f", newLocation.coordinate.longitude]; 
    _latitudeLabel.text = [NSString stringWithFormat:@"%.8f", newLocation.coordinate.latitude]; 
    } 
    //MKCoordinateRegion userLocation = MKCoordinateRegionMakeWithDistance(newLocation.coordinate, 1500.0, 1500.0); 
    //[regionsMapView setRegion:userLocation animated:YES]; 
} 

@end 

Answer 1

听起来像你打一个断点。有可能没有任何错误。你有没有看到这样的事情？ http://cl.ly/image/0T1G3n300G1r

如果是这样，只需点击并拖动它远离檐槽。它会消失。下一次你跑它不会在那里打破。