我已经从另一位绅士那里调整了这个代码。它到目前为止工作得很好,但在我的应用程序中,我计划有相当多的图像视图/按钮移动。实现这个的最佳方法是什么?也许将对象放入数组并使用枚举器?如果其他人做了类似的事情,那么在正确的方向上轻推将非常感激! 顺便说一下,他们在视图中都会有不同的坐标
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(dragGesture:)];
[dragImage addGestureRecognizer:panGesture];
[dragImage setUserInteractionEnabled:YES];
}
#pragma mark -
#pragma mark UIPanGestureRecognizer selector
- (void) dragGesture:(UIPanGestureRecognizer *) panGesture{
CGPoint translation = [panGesture translationInView:self.view];
switch (panGesture.state) {
case UIGestureRecognizerStateBegan:{
originalCentre = dragImage.center;
}
break;
case UIGestureRecognizerStateChanged:{
dragImage.center = CGPointMake(dragImage.center.x + translation.x,
dragImage.center.y + translation.y);
}
break;
case UIGestureRecognizerStateEnded:{
if (((dragImage.center.x >= 280) && (dragImage.center.y >= 280) &&
(dragImage.center.x <= 450) && (dragImage.center.y <= 450))) {
dragImage.center = CGPointMake(300, 300);
[dragImage setUserInteractionEnabled:NO];
break;
}
[UIView animateWithDuration:0.5
animations:^{
dragImage.center = originalCentre;
}
completion:^(BOOL finished){
}];
}
break;
default:
break;
}
[panGesture setTranslation:CGPointZero inView:self.view];
}
-(IBAction)clear{
[UIImageView animateWithDuration:0.5 animations:^{
dragImage.center = CGPointMake(100, 200);
}];
[dragImage setUserInteractionEnabled:YES];
}
非常感谢您花时间阅读这个问题。
答案 0 :(得分:2)
您可以使用recognizer.view
来确定要移动的视图。不要总是更改drawImage
,只需使用recognizer.view
即可。当识别器开始时,请确保将其取消(将enabled
设置为NO
然后YES
),如果它是不想要成为的子视图拖投掷的。
您可能需要更改其中一些幻数,具体取决于要移动的视图。