Question

只要 but子被 down倒,怎么能够反复使用这种方法。只要 but子被击落,这种形象就会上升。

-(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];
}

感谢!

Answer 1

你们可以登记两次控制活动:

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


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

之后处理2种方法:

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

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

友情链接