ios - 当我使用 Storyboard 时，无法识别applicationWillResignActive的功能

我不知道为什么，但是当我使用xib时没有问题。

错误消息如下：

2014-04-17 16:59:11.413 State Lab[2227:60b] Cannot find executable for CFBundle 0x8d800c0 </Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/System/Library/AccessibilityBundles/CertUIFramework.axbundle> (not loaded)

2014-04-17 16:59:11.453 State Lab[2227:60b] application:didFinishLaunchingWithOptions:

2014-04-17 16:59:11.459 State Lab[2227:60b] applicationDidBecomeActive:

2014-04-17 16:59:11.461 State Lab[2227:60b] -[spsViewController applicationDidBecomeActive:]: unrecognized selector sent to instance 0x8f8f390
2014-04-17 16:59:11.463 State Lab[2227:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[spsViewController applicationDidBecomeActive:]: unrecognized selector sent to instance 0x8f8f390'

*首先抛出调用堆栈：

我的代码：

   #import "spsViewController.h"

    @interface spsViewController ()

    @property (assign, nonatomic) BOOL animate;

    - (void)rotateLabelUp;
    - (void)rotateLabelDown;

    @end

    @implementation spsViewController

    @synthesize label, animate;

    - (void)viewDidLoad
    {
        [super viewDidLoad];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillResignActive:) name:UIApplicationWillResignActiveNotification object:[UIApplication sharedApplication]];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:[UIApplication sharedApplication]];
        CGRect bounds = self.view.bounds;
        CGRect labelFrame = CGRectMake(bounds.origin.x, CGRectGetMidY(bounds) - 50, bounds.size.width, 100);
        self.label = [[UILabel alloc] initWithFrame:labelFrame];
        label.font = [UIFont fontWithName:@"Helvetica" size:70];
        label.text = @"Bazinga!";
        label.textAlignment = NSTextAlignmentCenter;
        label.backgroundColor = [UIColor clearColor];
        [self.view addSubview:label];
        [self rotateLabelDown];
    }

    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        self.label = nil;
    }

    - (void)rotateLabelDown
    {
        [UIView animateWithDuration:5
                         animations:^{
                             label.transform = CGAffineTransformMakeRotation(M_PI);
                         }
                         completion:^(BOOL finished){
                             [self rotateLabelUp];
                         }];
    }

    - (void)rotateLabelUp
    {
        [UIView animateWithDuration:5
                         animations:^{
                             label.transform = CGAffineTransformMakeRotation(0);
                         }
                         completion:^(BOOL finished){
                             if (animate)
                                 [self rotateLabelDown];
                         }];
    }

    - (void)applicationWillResignActive
    {
        NSLog(@"VC: %@", NSStringFromSelector(_cmd));
        animate = NO;
    }

    - (void)applicationDidBecomeActive
    {
        NSLog(@"VC: %@", NSStringFromSelector(_cmd));
        animate = YES;
        [self rotateLabelDown];
    }

    @end

最佳答案

将您的@selector（applicationDidBecomeActive :)更改为@selector（applicationDidBecomeActive）

由于您的方法签名是- (void)applicationDidBecomeActive

关于ios - 当我使用 Storyboard 时，无法识别applicationWillResignActive的功能，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/23129474/