iOS中怎么實(shí)現(xiàn)數(shù)字倍數(shù)動(dòng)畫(huà)效果

本篇文章為大家展示了iOS中怎么實(shí)現(xiàn)數(shù)字倍數(shù)動(dòng)畫(huà)效果，內(nèi)容簡(jiǎn)明扼要并且容易理解，絕對(duì)能使你眼前一亮，通過(guò)這篇文章的詳細(xì)介紹希望你能有所收獲。

// 數(shù)字跳動(dòng)動(dòng)畫(huà)- (void)labelDanceAnimation:(NSTimeInterval)duration { //透明度 CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"]; opacityAnimation.duration = 0.4 * duration; opacityAnimation.fromValue = @0.f; opacityAnimation.toValue = @1.f; //縮放 CAKeyframeAnimation *scaleAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"]; scaleAnimation.duration = duration; scaleAnimation.values = @[@3.f, @1.f, @1.2f, @1.f]; scaleAnimation.keyTimes = @[@0.f, @0.16f, @0.28f, @0.4f]; scaleAnimation.removedOnCompletion = YES; scaleAnimation.fillMode = kCAFillModeForwards; CAAnimationGroup *animationGroup = [CAAnimationGroup animation]; animationGroup.animations = @[opacityAnimation, scaleAnimation]; animationGroup.duration = duration; animationGroup.removedOnCompletion = YES; animationGroup.fillMode = kCAFillModeForwards; [self.comboLabel.layer addAnimation:animationGroup forKey:@"kComboAnimationKey"];}

利用一個(gè)透明度從 0 ~ 1之間的alpha,然后縮放 之后加到動(dòng)畫(huà)組實(shí)現(xiàn)一下就好了

切記動(dòng)畫(huà)完成最好移除 否則可能引起動(dòng)畫(huà)內(nèi)存問(wèn)題

這里設(shè)置斜體字體

self.comboLabel.font = [UIFont fontWithName:@"AvenirNext-BoldItalic" size:50];

看著比較明顯

最后按鈕點(diǎn)擊的時(shí)候調(diào)用

- (IBAction)clickAction:(UIButton *)sender { self.danceCount++; [self labelDanceAnimation:0.4]; self.comboLabel.text = [NSString stringWithFormat:@"+ %tu",self.danceCount];}

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