如何拖动一个标签并放在UIToolbarItem在iphone [英] How to drag a label and drop on UIToolbarItem in iphone

问题描述

如何拖动标签（Move This）并拖放到任何一个UIToolBar项目（即1或2）或3 ...）按钮标题应该作为标签文本更改。

检查此问题的图片

解决方案

使用自定义按钮作为标签，然后使用此代码为：

  UIButton * button = [UIButton buttonWithType：UIButtonTypeCustom]; 
 [button addTarget：self action：@selector（btnTouch：withEvent :) forControlEvents：UIControlEventTouchDown]; 
 button.tag = -1; 
 button.titleLabel.text = @Move this; 
 [button addTarget：self action：@selector（btnTouch：withEvent :) forControlEvents：UIControlEventTouchDragInside]; 
 [self.view addSubview：button]; 
  

然后，您可以通过响应UIControlEventTouchDragInside事件来移动所需的任意位置，例如： b

pre> - （IBAction）btnTouch：（id）sender withEvent：（UIEvent *）event
{
CGPoint point = [[[all allTouches] anyObject] locationInView：self.view];
UIControl * control = sender;
control.center = point;

//这里使用它来检查相交，并检查您正在移动的项目的框架是否与子视图的框架相交
（UIView * anotherBtn in self.view .subviews）{

if（CGRectIntersectsRect（control.frame，anotherBtn.frame））{
// Do something
[anotherBtn setTitle：control.titleLabel.text];
}
}
}


希望它能帮助你。 / p>

I am facing problem to drag and drop UILabel .

How to drag label(Move This) and drop on any one of UIToolBar item (i.e., 1 or 2 or 3 ...) that button title should change as label text.

Check image for this question

解决方案

Use custom button as a label and then use this code as :

     UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button addTarget:self action:@selector(btnTouch:withEvent:) forControlEvents:UIControlEventTouchDown];
    button.tag = -1;
button.titleLabel.text = @"Move this";
        [button addTarget:self action:@selector(btnTouch:withEvent:) forControlEvents:UIControlEventTouchDragInside];
        [self.view addSubview:button];

Then you may move the buttol wherever you want, by responding to the UIControlEventTouchDragInside event, e.g.:

- (IBAction) btnTouch:(id) sender withEvent:(UIEvent *) event
{
    CGPoint point = [[[event allTouches] anyObject] locationInView:self.view];
    UIControl *control = sender;
    control.center = point;

    //Here use this to check when intersects and check if the frame of the item you are moving intersects with the frame from on of your subviews
    for (UIView *anotherBtn in self.view.subviews) {

        if (CGRectIntersectsRect(control.frame, anotherBtn.frame)) {
            // Do something
            [anotherBtn setTitle:control.titleLabel.text];
        }
    }
}

Hope it helps you.

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