今天又是闲得蛋疼,研究一下关于button拖动事件,其实很简单,是需要几句话就可以,废话不多说,上代码
关于viewcontroller.h里面的东西
@property(nonatomic,strong)UIButton *button;
关于viewcontroller.m里面的东西
首先写viewDidLoad里面的
self.button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
self.button.frame = CGRectMake(100, 100, 50, 50);
self.button.backgroundColor = [UIColor redColor];
[self.button setTitle:@"触摸" forState:UIControlStateNormal];
[self.button setTitle:@"移动" forState:UIControlEventTouchDown];
[self.button addTarget:self action:@selector(dragMoving:withEvent: )forControlEvents: UIControlEventTouchDragInside];
[self.button addTarget:self action:@selector(dragEnded:withEvent: )forControlEvents:UIControlEventTouchUpOutside];
[self.button addTarget:self action:@selector(buttonAction:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:self.button];
}
然后是方法
- (void) dragMoving: (UIControl *) c withEvent:ev
{
c.center = [[[ev allTouches] anyObject] locationInView:self.view];
}
- (void) dragEnded: (UIControl *) c withEvent:ev
{
c.center = [[[ev allTouches] anyObject] locationInView:self.view];
}
-(void)buttonAction:(UIButton *)sender
{
NSLog(@"起飞");
}
好了,就是这么简单
