UIView 渐渐出现 和渐渐消失了动画效果

渐渐 出现spa  self.photoView = [[PhotoShowView alloc]initWithFrame:PJ_MainScreen];orm     self.photoView.transform = CGAffineTransformMakeScale(0.1, 0.1);rem     self.photoView.alpha = 0;animation     sel

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