之前覺得很簡單，寫兩個基礎(chǔ)動畫嵌套即可，但是發(fā)現(xiàn)并不是那么回事，后面動畫會覆蓋前面那個，自己就寫了個，看代碼：
//縮放動畫
[UIView animateKeyframesWithDuration:1delay:0options:0animations: ^{
? ? self.bgView.transform = CGAffineTransformMakeScale(0.1,0.1);
? ? [UIView addKeyframeWithRelativeStartTime:0relativeDuration:1animations: ^{
? ? ? ? self.view.transform = CGAffineTransformMakeScale(1.2,1.2);
? ? }];
? ? [UIView addKeyframeWithRelativeStartTime:1relativeDuration:1animations: ^{
? ? ? ? self.view.transform = CGAffineTransformMakeScale(1.0,1.0);
? ? }];
} completion:nil];
