將UILabel向上移動NSTimer

Question

HI all， 我想將UILabel向上移動5秒並隱藏起來。 我們在遊戲中看到的東西，當我們得到布魯斯什麼的時候， 文字出現，向上移動說什麼「+300」等。

如何移動UIlabel？ 問候

Answer 1

看一看在UIView animation methods

即

- (void)showScoreLabelFor:(int)score { 
    // Make a label 
    UILabel *scoreLabel = [UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)] autorelease]; 

    // Set it's text to the score we want to show 
    [scoreLabel setText:[NSString stringWithFormat:@"%+i", score]]; 

    // Center it in the view 
    [scoreLabel sizeToFit]; 
    [scoreLabel setCenter:CGPointMake([[self view] center].x, 200)]; 

    // Add it to the view 
    [[self view] addSubview:scoreLabel]; 

    // Animate it up 100 pixels ver 2 seconds 
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:2.0]; 
    CGRect frame = [scoreLabel frame]; 
    frame.origin.y -= 100; 
    [scoreLabel setFrame:frame]; 
    [UIView commitAnimations]; 
}