使用CGAffineTransformTranslate通过触摸在特定区域移动图像

Question

我想在屏幕的某个区域移动图像。我不想与框架混淆，因为它会在稍后造成碰撞行为的麻烦。我得到了这个代码到目前为止。我不知道如何使用触摸感谢您的帮助

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    //CGPoint svpt = [[touches anyObject] locationInView:self.view]; 
    CGPoint pt = [[touches anyObject] locationInView:self.playerMove]; 
    CGRect frame = [self.playerMove frame]; 
    CGAffineTransform CGAT = CGAffineTransformIdentity; 
    CGAT = CGAffineTransformTranslate(CGAT, MIN(MAX(frame.origin.x, -10), 240), MIN(MAX(frame.origin.y, 430), 430)); 
    self.playerMove.transform = CGAT; 
} 

Answer 1

您可以使用平移手势识别器。

UIPanGestureRecognizer *gr = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)]; 
[self.playerMove addGestureRecognizer:gr]; 
self.playerMove.userInteractionEnabled = YES; 

再后来......

- (void)handlePan:(UIPanGestureRecognizer *)gr { 

    if (gr.state == UIGestureRecognizerStateBegan || gr.state == UIGestureRecognizerStateChanged) { 
     UIView *view = gr.view; 
     CGPoint translation = [gr translationInView:view]; 
     view.transform = CGAffineTransformTranslate(view.transform, translation.x, translation.y); 
     [gr setTranslation:CGPointZero inView:view]; 
    } 
}