不斷髮送來自UIButton的消息

Question

我正在製作遊戲，並且無法創建D-Pad。當我點擊一個按鈕的時候，它只會運行一次，我不知道我可以調用哪個事件來讓它不斷運行代碼，直到玩家停止觸摸按鈕。當我嘗試使用while循環時，它只是重載本身並阻止您觸摸其他按鈕。這是我通常使用移動播放器的代碼和按鈕的實際負荷和這樣的：

- (void) playerMoveLeft 
{  
    NSArray *images = [NSArray arrayWithObjects:img9,img10,img11,img12,img13,img14,img15,img16, nil]; 

    [imageView setAnimationImages:images]; 

     NSLog(@"Called left"); 
     CGRect myFrame = imageView.frame; 
     myFrame.origin.x = imageView.frame.origin.x - 5; 
     imageView.frame = myFrame; 
     [imageView startAnimating]; 
    [NSTimer scheduledTimerWithTimeInterval:0.6 
            target:self 
            selector:@selector(nothingMovingLeft) 
            userInfo:nil 
            repeats:NO]; 
    [myTimer invalidate]; 
    myTimer = nil; 
} 


{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    img1 = [UIImage imageNamed:@"walking-e0000.png"]; 
    img2 = [UIImage imageNamed:@"walking-e0001.png"]; 
    img3 = [UIImage imageNamed:@"walking-e0002.png"]; 
    img4 = [UIImage imageNamed:@"walking-e0003.png"]; 
    img5 = [UIImage imageNamed:@"walking-e0004.png"]; 
    img6 = [UIImage imageNamed:@"walking-e0005.png"]; 
    img7 = [UIImage imageNamed:@"walking-e0006.png"]; 
    img8 = [UIImage imageNamed:@"walking-e0007.png"]; 
    img9 = [UIImage imageNamed:@"walking-w0000.png"]; 
    img10 = [UIImage imageNamed:@"walking-w0001.png"]; 
    img11 = [UIImage imageNamed:@"walking-w0002.png"]; 
    img12 = [UIImage imageNamed:@"walking-w0003.png"]; 
    img13 = [UIImage imageNamed:@"walking-w0004.png"]; 
    img14 = [UIImage imageNamed:@"walking-w0005.png"]; 
    img15 = [UIImage imageNamed:@"walking-w0006.png"]; 
    img16 = [UIImage imageNamed:@"walking-w0007.png"]; 

    imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0,180.0,80.0,80.0)]; 

    NSArray *images = [NSArray arrayWithObjects:img7, nil]; 

    [imageView setAnimationImages:images]; 

    [imageView setAnimationRepeatCount:100]; 

    [imageView setAnimationDuration:0.5]; 

    [imageView startAnimating]; 

    [myView addSubview:imageView]; 


    moveRight = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 

    [moveRight addTarget:self action:@selector(playerMoveRight) forControlEvents:UIControlEventTouchUpInside]; 

    [moveRight setTitle:@"->" forState:UIControlStateNormal]; 

    moveRight.frame = CGRectMake(200, 280, 60, 60); 

    [myView addSubview:moveRight]; 



    //longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(whichWayToMove:)]; 

    //longPress.minimumPressDuration = 0.0; 

    //[myView addGestureRecognizer:longPress]; 

    moveLeft = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 

    [moveLeft addTarget:self action:@selector(playerMoveLeft) forControlEvents:UIControlEventTouchUpInside]; 

    [moveLeft setTitle:@"<-" forState:UIControlStateNormal]; 

    moveLeft.frame = CGRectMake(30, 280, 60, 60); 

    [myView addSubview:moveLeft]; 

    NSLog(@"Finished setup"); 
} 

Answer 1

當您使用定時器在playerMoveLeft，你應該用同樣的方法在計時器根據你的代碼，它只會運行一次。其次要設置重複到NO，用於重複使用YES

[NSTimer scheduledTimerWithTimeInterval:0.6 
            target:self 
            selector:@selector(playerMoveLeft) 
            userInfo:nil 
            repeats:YES]; 

Answer 2

USE NSTimer用於呼叫的多個時間帶的特定TIME INTERVAL

[NSTimer scheduledTimerWithTimeInterval:2.0 // You can set TimeInterval as u need. 
    target:self 
    selector:@selector(targetMethod) 
    userInfo:nil 
    repeats:YES]; 

呼叫targetMethod方法2.0時間間隔

-(void)targetMethod 
{ 
    // write code for your method 
} 

你也可以通過usi停止NSTimer納克其方法invalidate

[MyTimer invalidate]; 

更多有關NSTimer閱讀How do I use NSTimer?

Answer 3

閱讀這篇文章，同時具有定時解決方案，並與觸摸解決方案按鈕

Way to make a UIButton continuously fire during a press-and-hold situation?

您可以管理爲此設置它