[英]Animating a UIImageView
我正在嘗試為UIImageView
設置動畫,以使其從高度x到高度y進行動畫處理,並且我有以下代碼:
- (void)viewDidLoad
{
[super viewDidLoad];
self.test = [self createNewBarWithValue:800 atLocation:CGPointMake(107, 43)];
}
- (UIImageView*)createNewBarWithValue:(float)percent atLocation:(CGPoint)location
{
UIImageView *newBar = [[[UIImageView alloc] initWithFrame:CGRectMake(location.x, location.y, 107, 43)] autorelease];
newBar.image = [UIImage imageNamed:@"bar.png"];
CABasicAnimation *scaleToValue = [CABasicAnimation animationWithKeyPath:@"transform.scale.y"];
scaleToValue.toValue = [NSNumber numberWithFloat:percent];
scaleToValue.fromValue = [NSNumber numberWithFloat:0];
scaleToValue.duration = 1.0f;
scaleToValue.delegate = self;
newBar.layer.anchorPoint = CGPointMake(0.5, 1);
[newBar.layer addAnimation:scaleToValue forKey:@"scaleUp"];
CGAffineTransform scaleTo = CGAffineTransformMakeScale( 1.0f, percent );
newBar.transform = scaleTo;
return newBar;
}
但是,我在這里看不到任何東西。 我想念什么?
您似乎沒有將UIImageView
添加到視圖控制器的視圖中。
前
[self.view addSubview:test];
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