大佬教程收集整理的这篇文章主要介绍了objective-c – 将uiimage拖放到另一个uiimageview中，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[myImageView addGestureRecognizer:panRecognizer];
-(void)move:(id)sender {
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
firstX = [myImageView center].x;
firstY = [myImageView center].y;
}
translatedPoint = CGPointMake(firstX+translatedPoint.x,firstY+translatedPoint.y);
[myImageView setCenter:translatedPoint];
}
这段代码拖拽了整个myImageView,但是我的要求是只需拖动uiimage并将其拖放到另一个uiimagview.myImageView也应该保持拖动后也是如此.我需要拖动myImageView layer.draggable图像应该是透明的.任何想法都会受到赞赏.
第1步：在.h文件中定义这3个变量
UIImageView *ivSource1,*ivDestination2,*tempIV;
第2步：初始化所有三个UIImageView并添加到ViewController中,在viewDidLoad方法中编写它
ivSource1 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1.jpg"]]; [ivSource1 setFrame:CGRectMake(100,100,100)]; [ivSource1 setTag:100]; [ivSource1 setUserInteractionEnabled:YES]; [self.view addSubview:ivSource1]; ivDestination2 = [[UIImageView alloc] init]; [ivDestination2 setFrame:CGRectMake(200,300,100)]; [ivDestination2 setTag:101]; [ivDestination2 setUserInteractionEnabled:YES]; [self.view addSubview:ivDestination2]; tempIV = [[UIImageView alloc] init]; [tempIV setFrame:CGRectMake(0,100)]; [tempIV setTag:102]; [tempIV setUserInteractionEnabled:YES]; [self.view addSubview:tempIV];
步骤3：定义以下触摸方法以处理拖动和放大的图像移动.下降
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
if([[touch view] tag] == 100)
{
[tempIV setImage:ivSource1.image];
[tempIV setCenter:[touch locationInView:self.view]];
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
[tempIV setCenter:[touch locationInView:self.view]];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
[tempIV setCenter:[touch locationInView:self.view]];
if(CGRectContainsPoint(ivDestination2.frame,[touch locationInView:self.view]))
{
[ivDestination2 setImage:tempIV.image];
}
// Remove image from dragable view
[tempIV setImage:[UIImage imageNamed:@""]];
}
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