UITouch，拖放並沒有在所有工作

我有一個UIView和他的頂部我有UIButton，UITableView和UINavigationBar。我想要做的是，當你點擊UIButton並拖動它時，所有視圖將只移動到左側，直到屏幕結束。我的意思是，您可以將視圖拖動到左側，當您停止觸摸時，視圖將停止在您的手指停止觸摸屏幕的位置。UITouch，拖放並沒有在所有工作

我不能這樣做，他只給我看「觸動開始1」，就是這樣。這裏似乎是我的問題？

非常感謝大家！

float oldX, oldY; 
BOOL dragging; 

- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event 
{ 
    NSLog("Touches Began 1"); 
    UITouch *touch = [[event allTouches] anyObject]; 
    CGPoint touchLocation = [touch locationInView:self.view]; 

    if (CGRectContainsPoint(btnOpen.frame, touchLocation)) 
    { 
     NSLog("Touches Began 2"); 
     dragging = YES; 
     oldX = touchLocation.x; 
     oldY = touchLocation.y; 
    } 
} 

- (void) touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event 
{ 
    UITouch *touch = [[event allTouches] anyObject]; 
    CGPoint touchLocation = [touch locationInView:self.view]; 

    if (dragging) 
    { 
     NSLog("Dragging!"); 
     CGRect frame = mainView.frame; 
     frame.origin.x = mainView.frame.origin.x + touchLocation.x - oldX; 
     frame.origin.y = mainView.frame.origin.y + touchLocation.y - oldY; 
     mainView.frame = frame; 
    } 
} 

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    NSLog("Touches Ended!"); 
    dragging = NO; 
} 


- (void)viewDidLoad 
{  
    [btnOpen addTarget:self action:@selector(touchesBegan:withEvent:) forControlEvents: UIControlEventTouchDown]; 
    [btnOpen addTarget:self action:@selector(touchesMoved:withEvent:) forControlEvents: UIControlEventTouchDragInside]; 
    [btnOpen addTarget:self action:@selector(touchesEnded:withEvent:) forControlEvents: UIControlEventTouchUpInside | UIControlEventTouchUpOutside]; 
}

來源

2012-08-09 Yossi Tsafar

- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event 
{ 
    NSLog("Touches Began 1"); 
for (UITouch *touch in touches) { 
    //UITouch *touch = [[event allTouches] anyObject]; 
    CGPoint touchLocation = [touch locationInView:self.view]; 

    if (CGRectContainsPoint(btnOpen.frame, touchLocation)) 
    { 
     NSLog("Touches Began 2"); 
     //dragging = YES; 
     oldX = touchLocation.x; 
     oldY = touchLocation.y; 
    } 
} 
} 

- (void) touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event 
{ 
    // UITouch *touch = [[event allTouches] anyObject]; 
for (UITouch *touch in touches) { 
    CGPoint touchLocation = [touch locationInView:self.view]; 

    if (CGRectContainsPoint(btnOpen.frame, touchLocation)) 
    { 
     NSLog("Dragging!"); 
     CGRect frame = mainView.frame; 
     frame.origin.x = mainView.frame.origin.x + touchLocation.x - oldX; 
     frame.origin.y = mainView.frame.origin.y + touchLocation.y - oldY; 
     mainView.frame = frame; 
    } 
} 
}

嘗試這樣我認爲這將是對你有所幫助。

來源

2012-08-09 12:00:24

您所要求的觸摸的座標有關

CGPoint touchLocation = [touch locationInView:self.view];

然後你問主視圖的框架，如果touchLocation的位置的按鈕框架

的框架內

if (CGRectContainsPoint(btnOpen.frame, touchLocation))

換句話說。您正在檢查觸摸是否在按鈕的範圍內，但您通過在主視圖上進行的觸摸座標來檢查，而不是按鈕。

因此，這是你應該做的：

CGPoint touchLocation = [touch locationInView:btnOpen];

來源

2012-08-09 11:40:18 Cyprian

UITouch，拖放並沒有在所有工作

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