Modal View Shake手勢

Question

我在使用模態視圖切換的搖擺手勢時遇到問題。當我第一次進入指定的視圖控制器時，搖動手勢起作用。但是，當我退出並返回時，它不會。我已經實現了可以成爲第一響應者和viewdidAppear技術，並且控制檯使用NSLog條目檢測到震動，但沒有任何反應。其他一切似乎都有效，但它不會在第二次觀看時發起動作。

任何幫助或洞察力將不勝感激

Answer 1

請讓我知道什麼其他代碼段將是有益的 -

-(BOOL)canBecomeFirstResponder { 
return YES;} 


- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{ 
if (event.subtype == UIEventSubtypeMotionShake) 
{ 
    // Put in code here to handle shake 
    NSLog(@"Shaken"); 
    time = 9.0; 
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countdown) userInfo:nil repeats:NO]; 
    myAnimatedView.hidden = NO; 
    myAnimatedView2.hidden = NO; 
    myAnimatedView3.hidden = NO; 
    webViewRandomizer.hidden = YES; 
    backToRandomizer.hidden = YES; 
    backToRandomizerBG.hidden = YES; 
    backRandomizer.hidden = YES; 
    forwardRandomizer.hidden = YES; 
    backToRandomizerMenu.hidden = YES; 
    tweetView.image = [UIImage imageNamed:@"3988567990_60d8da5cdf_o.jpg"]; 
    [webViewRandomizer resignFirstResponder]; 
    [self becomeFirstResponder]; 




    [myAnimatedView setAnimationRepeatCount:6]; 
    [myAnimatedView2 setAnimationRepeatCount:2]; 
    [myAnimatedView3 setAnimationRepeatCount:1]; 
    myAnimatedView.animationDuration = 0.5; 
    myAnimatedView2.animationDuration = 3.0; 
    myAnimatedView3.animationDuration = 9.0; 

    [myAnimatedView startAnimating]; 
    [myAnimatedView2 startAnimating]; 
    [myAnimatedView3 startAnimating]; 



    NSURL *url = [NSURL URLWithString:@"http://historicaltweets.com/"]; 
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; 
    [webViewRandomizer loadRequest:requestObj]; 
    [self performSelector:@selector(aShowRandomizer) withObject:nil afterDelay:10.0f];} 

if ([super respondsToSelector:@selector(motionEnded:withEvent:)]){ 
    [super motionEnded:motion withEvent:event]; }} 

#define kUpdateInterval (1.0f/60.0f) 

- (void)viewDidAppear:(BOOL)animated{ 
UIAccelerometer *accel = [UIAccelerometer sharedAccelerometer]; 
accel.delegate = self; 
accel.updateInterval = kUpdateInterval; 
[super viewDidAppear:animated]; 
[self becomeFirstResponder];} 

- (void)viewDidDisappear:(BOOL)animated{ 
UIAccelerometer *accel = [UIAccelerometer sharedAccelerometer]; 
accel.delegate = nil;} 

-(IBAction)backToRandomizerMenuGo{ 


[self dismissModalViewControllerAnimated:YES];}