UIImage加阴影

  

   

    

     

    
    

     

       UIImageView*pageContenterImageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"onePageApple.png"]];
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //添加边框
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              CALayer*layer = [pageContenterImageView layer];
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              layer.borderColor= [[UIColor whiteColor]CGColor];
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              layer.borderWidth=0.0f;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //添加四个边阴影
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              pageContenterImageView.layer.shadowColor= [UIColor blackColor].CGColor;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              pageContenterImageView.layer.shadowOffset=CGSizeMake(0,0);
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              pageContenterImageView.layer.shadowOpacity=0.5; 
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              pageContenterImageView.layer.shadowRadius=5.0;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //添加两个边阴影
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //pageContenterImageView.layer.shadowColor = [UIColor blackColor].CGColor;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        // pageContenterImageView.layer.shadowOffset = CGSizeMake(2, 2);
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        // pageContenterImageView.layer.shadowOpacity = 0.5; 
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        // pageContenterImageView.layer.shadowRadius = 2.0;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //-------------
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              阴影渲染会严重消耗内存 ,导致程序咔叽.
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        /*阴影效果*/
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //添加边框
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              CALayer*layer = [self.pageContenter layer];
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              layer.borderColor= [[UIColorwhiteColor]CGColor];
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              layer.borderWidth=0.0f;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //添加四个边阴影
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              self.pageContenter.layer.shadowColor= [UIColorblackColor].CGColor;//阴影颜色
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              self.pageContenter.layer.shadowOffset=CGSizeMake(0,0);//阴影偏移
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              self.pageContenter.layer.shadowOpacity=0.5;//阴影不透明度
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     

              self.pageContenter.layer.shadowRadius=5.0;//阴影半径
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //添加两个边阴影
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //self.pageContenter.layer.shadowColor = [UIColor blackColor].CGColor;
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //self.pageContenter.layer.shadowOffset = CGSizeMake(2, 2);
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //self.pageContenter.layer.shadowOpacity = 0.5; 
     
    
   

    

     

    
    

     
        
     
    
   

    

     

    
    

     
        //self.pageContenter.layer.shadowRadius = 2.0; 
     
    
  
 

  
 
 

  

   

    

     

    
    

     

       UIView * content=[[UIView alloc] initWithFrame:CGRectMake(100, 250, 503, 500)]; 
     
    
   

    

     

    
    

     

          content.backgroundColor=[UIColor orangeColor];
     
    
   

    

     

    
    

     
    //content.layer.shadowOffset=10;
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          content.layer.shadowOffset = CGSizeMake(5, 3);
     
    
   

    

     

    
    

     

          content.layer.shadowOpacity = 0.6;
     
    
   

    

     

    
    

     

          content.layer.shadowColor = [UIColor blackColor].CGColor;
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          [self.window addSubview:content];
     
    
  
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/8351034