bluetooth99 2013-01-17 07:18 采纳率: 0%
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iphone,实现拖拽到同一位置

嗨,应用中有拖拽选项,需要实现将对象拖拽到位置之后,在同一位置设置对象,但是我下面的代码实现不了,不知道怎么办?是在IOS6版本中的,谢谢大家们的帮助。

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint touchPoint = [[touches anyObject] locationInView:self.view];
if (touchPoint.x > self.img1.frame.origin.x &&
    touchPoint.x < self.img1.frame.origin.x + self.img1.frame.size.width &&
    touchPoint.y > self.img1.frame.origin.y &&
    touchPoint.y < self.img1.frame.origin.y + self.img1.frame.size.height )
{
    self.img1.backgroundColor = self.img1.backgroundColor;

}
self.img1.frame = CGRectMake(self.homePosition.x, self.homePosition.y,
                                   self.img1.frame.size.width,
                                   self.img1.frame.size.height);
}
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1条回答

  • gaoXxxing 2013-01-17 08:13
    关注

    在.h文件:

    CGPoint startPt;
    

    在.m文件:

    -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
        startPt = [[touches anyObject] locationInView:self.view];
    
    }
    
    - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
    {
    CGPoint touchPoint = [[touches anyObject] locationInView:self.view];
    if (touchPoint.x > self.img1.frame.origin.x &&
        touchPoint.x < self.img1.frame.origin.x + self.img1.frame.size.width &&
        touchPoint.y > self.img1.frame.origin.y &&
        touchPoint.y < self.img1.frame.origin.y + self.img1.frame.size.height )
    {
        self.img1.backgroundColor = self.img1.backgroundColor;
    
    }
    
    self.img1.frame = CGRectMake(startPt.x, startPt.y,
                                       self.img1.frame.size.width,
                                       self.img1.frame.size.height);
    }
    
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