我的应用程序在启动后立即崩溃
由于它在写入文档中,我的应用程序在启动后立即崩溃。我真的不知道该怎么做。谢谢你的帮助。这里是代码:我的应用程序在启动后立即崩溃
#import "ViewController.h"
@import CoreLocation;
@interface ViewController() <CLLocationManagerDelegate>
@property (strong, nonatomic) CLLocationManager *locationManager;
@property (weak, nonatomic) IBOutlet UILabel *location;
@property (weak, nonatomic) IBOutlet UILabel *date;
@end
@implementation ViewController
-(void)viewDidLoad
{
[super viewDidLoad];
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
[self.locationManager requestWhenInUseAuthorization];
}
[self.locationManager startUpdatingLocation];
//date
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MMMM d, YYYY"];
NSString *dateString = [dateFormatter stringFromDate:[NSDate date]];
NSLog(@"%@", dateString);
self.date.text = (@"%@", dateString);
}
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
NSLog(@"%@", [locations lastObject]);
self.location.text = (@"%@", [locations lastObject]);
}
@end
崩溃后,它显示了这个: http://i.stack.imgur.com/k0eVO.png
您的代码是不完整的,你可以检查出来,并再次
你已经得到
@selector(requestWhenInUseAuthorization)
发布
而你还没有设置功能requestWhenInUseAuthorization
您在下面的代码中放置了哪种方法。你已经把它放在viewDidLoad下面,但它不在任何方法内。检查你的代码正确
[self.locationManager startUpdatingLocation];
//date
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MMMM d, YYYY"];
NSString *dateString = [dateFormatter stringFromDate:[NSDate date]];
NSLog(@"%@", dateString);
self.date.text = (@"%@", dateString);
}
我也很困惑,但它只是一个格式问题,代码实际上是正确的,关于选择器:他没有定义它,他是在CLLocationManager上调用它,而不是自我 – luk2302 2015-04-05 11:25:08
一切工作正常,但添加'self.date.text =(@“%@”,dateString);'线后它不再工作。我试图删除该行并再次运行,但没有任何工作。 – pettyBright 2015-04-05 11:41:15
请删除此答案,因为它不包含任何相关内容 – luk2302 2015-04-05 11:48:08
适用异常断点在你的应用程序,然后再试一次。它会告诉你哪儿崩溃是
你能告诉我们什么是在调试器打印? – Priyatham51 2015-04-05 10:19:42
你看过http://stackoverflow.com/questions/24850128/ios-8-requestwheninuseauthorization-no-popup吗? – luk2302 2015-04-05 11:26:43
挂钩lldb并检查后面的跟踪 – Wingzero 2015-04-05 13:20:41