图片“九宫格”布局frame 之通用公式

1.属性说明：

#define kImageWidth 90    //图片宽 

#define kImageHeight 90   //图片高

#define kImageEdge 5        //图片间隔

#define kImageCount 3       //单行图片个数

//所选择的图片数组

@property (nonatomic, strong)NSMutableArray *selectedImages;  

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2.重点代码

  ///>>添加imageView

     //遍历图片数组

    [self.selectedImages enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

     

       UIImageView *imageView = [[UIImageView alloc] init];

       

//设置单张图片的frame

          // x 取余

        CGFloat x = idx % kImageCount * (kImageWidth + kImageEdge);

          // y 取商

        CGFloat y = idx / kImageCount * (kImageHeight + kImageEdge);

        imageView.frame = CGRectMake(x, y, kImageWidth, kImageHeight);

        imageView.image = obj;
        //添加到父视图上

        [self.imageSuperView addSubview:imageView];

     

    }];