我試圖重複一個動畫序列,在LOOP內部,隨機地在每個循環中改變一些參數。這是代碼。任何人都知道爲什麼它不起作用? 如果我使用按鈕動作調用它,它可以工作,但是使用循環它不會。 非常感謝! Giuseppe循環動畫 - 不走
-(IBAction)startLoop:(id)sender {
for (int i=1;i<10; i++) {
[self animation2];
}
}
-(id) animation2 {
int max=500;
UIImage *myImage = [UIImage imageNamed:@"coccinella2.png"];
CALayer *myLayer = [CALayer layer];
myLayer.contents = (id)myImage.CGImage;
myLayer.bounds = CGRectMake(0, 0, 50, 60);
[myLayer setPosition:CGPointMake(arc4random()%(max), arc4random()%(max))];
[myLayer setBounds:CGRectMake(0.0, 0.0, 50.0, 60.0)];
[self.view.layer addSublayer:myLayer];
//translation1
CGPoint startPt = CGPointMake(arc4random()%(max),arc4random()%(max));
CGPoint endPt = CGPointMake(arc4random()%(max),arc4random()%(max));
CABasicAnimation *transl1 = [CABasicAnimation animationWithKeyPath:@"position"];
transl1.removedOnCompletion = FALSE;
transl1.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
transl1.fromValue = [NSValue valueWithCGPoint:startPt];
transl1.toValue = [NSValue valueWithCGPoint:endPt];
transl1.duration = 2.0;
transl1.fillMode = kCAFillModeForwards;
transl1.beginTime = 0;
//scale 1
CABasicAnimation *scale1 = [CABasicAnimation
animationWithKeyPath:@"transform.scale"];
scale1.removedOnCompletion = FALSE;
[scale1 setToValue:[NSNumber numberWithInt:3]];
[scale1 setDuration:2.0f];
scale1.fillMode = kCAFillModeForwards;
scale1.beginTime = 0;
//rotation1
CABasicAnimation *rotation1 = [CABasicAnimation
animationWithKeyPath:@"transform.rotation.z"];
rotation1.removedOnCompletion = FALSE;
[rotation1 setFromValue:DegreesToNumber(0)];
[rotation1 setToValue:DegreesToNumber(90)];
//rotation1.repeatCount = HUGE_VALF;
[rotation1 setDuration:2.0f];
rotation1.fillMode = kCAFillModeForwards;
rotation1.beginTime = 0;
//group
CAAnimationGroup* group = [CAAnimationGroup animation];
[group setDuration: 6.0];
group.removedOnCompletion = FALSE;
group.fillMode = kCAFillModeForwards;
[group setAnimations: [NSArray arrayWithObjects:scale1, transl1, rotation1, nil]];
[myLayer addAnimation: group forKey: nil];
}
謝謝,我的目標是不斷重複動畫,例如每0.1秒,我怎麼能調用這個方法? – Beppino66