iOS 按钮拖动。

-(void)testMove

{

moveBtn = [[UIButton alloc ]init];

moveBtn.frame = CGRectMake(0, 30, 60, 60);

moveBtn.backgroundColor = [UIColorredColor];

//[moveBtn addTarget:self action:@selector(moveBtn) forControlEvents:UIControlEventTouchDown];

//[moveBtn addTarget:self action:@selector(moveBtnEnd) forControlEvents:UIControlEventTouchUpInside];

[moveBtnaddTarget:selfaction:@selector(dragMoving:withEvent: )forControlEvents: UIControlEventTouchDragInside];

[moveBtnaddTarget:selfaction:@selector(doClick:) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:moveBtn];

}

- (void) dragMoving: (UIButton *)btn withEvent:(UIEvent *)event

{

CGPoint point = [[[event allTouches] anyObject] locationInView:self.view];

CGFloat x = point.x;

CGFloat y = point.y;

CGFloat btnx = btn.frame.size.width/2;

CGFloat btny = btn.frame.size.height/2;

if(x<=btnx)

{

point.x = btnx;

}

if(x >= self.view.bounds.size.width - btnx)

{

point.x = self.view.bounds.size.width - btnx;

}

NSLog(@"fs:%f %f",x, btnx);

btn.center = point;

NSLog(@"%f,,,%f",btn.center.x,btn.center.y);

}