iOS UIView简单的缩放动画效果

// 创建一个背景 self.bgView = [UIView new]; [self addSubview:self.bgView]; [self.bgView mas_makeConstraints:^(MASConstraintMaker *make) { make.centerX.mas_equalTo(self.bounds.origin.x); make.centerY.mas_equalTo(self.bounds.origin.y); make.width.mas_equalTo(alertWidth * kWIDTH);//宽度自己设置 300 make.height.mas_equalTo(alertHeight * kHEIGHT);// 高度自己设置 200 }]; self.bgView.backgroundColor = [UIColor redColor]; // 0.2 表示动画时长为0.2秒 [UIView animateWithDuration:0.2 animations:^{ // transform 使...变形 // CGAffineTransformMakeScale(1.2, 1.2) 缩放的比例 缩放为原来的1.2倍 self.bgView.transform = CGAffineTransformMakeScale(1.2, 1.2); } completion:^(BOOL finished) { // 完成后要将视图还原 // CGAffineTransformIdentity [UIView animateWithDuration:0.2 animations:^{ self.bgView.transform = CGAffineTransformIdentity; }]; }];