iOS 启动页放大淡出效果

//屏幕宽度
#define kWIDTH [UIScreen mainScreen].bounds.size.width
//屏幕高度

#define kHEIGHT [UIScreen mainScreen].bounds.size.height

 

[objc] view plain copy

 

1. UIImageView * lunchImg=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];  
2.         lunchImg.image=[UIImage imageNamed:@"lunch"];  
3.         [[UIApplication sharedApplication].keyWindow addSubview:lunchImg];  
4.           
5.           
6.         [UIView animateWithDuration:0.8 animations:^{  
7.             lunchImg.layer.transform = CATransform3DMakeScale(1.5, 1.5, 1);  
8.             lunchImg.alpha=0.0;  
9.         } completion:^(BOOL finished) {  
10.             [lunchImg removeFromSuperview];  
11.         }];