可可触摸 - 按住按钮

Question

只要按住按钮，我怎样才能重复运行此方法。这样，只要按下按钮，图像就会向上移动。

-(IBAction)thrustButton{ //moves ship foward

    yCoordinate = yCoordinate - 2;

    [UIView beginAnimations:@"slide-up" context:NULL];
    shipImageView.center = CGPointMake(xCoordinate,yCoordinate);  // change this to somewhere else you want.
    [UIView commitAnimations];
} 

谢谢！

Answer 1

您可以注册2个控制事件：

[yourButton addTarget:self action:@selector(doneButtonPressed) forControlEvents:UIControlEventTouchDown];


[yourButton addTarget:self action:@selector(doneButtonReleased) forControlEvents:UIControlEventTouchUpInside];

然后处理2个方法：

- (void)doneButtonPressed { 
  // open a thread
  while(someBOOL) {
    //do something you want 
  }
}

- (void)doneButtonReleased {
  // do something
  someBOOL = NO;
}