iOS Block 页面传值

直接上代码

1.定义block

@interface TopTypeCollectionView : UIView

@property (nonatomic, strong) NSArray *typeItemArray;//数据源

typedef void(^Blo)(NSString *s1 , UIColor *c);//定义block名字
@property (nonatomic , copy) Blo block;//声明

/**
 cell点击回调Block
 */
@property (nonatomic , copy) void (^clickCellCb)(NSString *group,int index);//匿名block


@end

2.TopTypeCollectionView中调用

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    //调用block
    if (self.clickCellCb) {
        self.clickCellCb(self.group , (int)indexPath.row);
    }
}

3.初始化block

__weak  ViewController *weakself = self;
//类型列表
        TopTypeCollectionView *topTypeView = [[TopTypeCollectionView alloc] initWithFrame:CGRectZero];
        topTypeView.typeItemArray = @[];
        topTypeView.backgroundColor = [UIColor whiteColor];
        topTypeView.group = group;
        //点击cell，打开页面
        topTypeView.clickCellCb = ^(NSString *groupTemp , int index){
            [weakself openWallpaperView:groupTemp index:index];
        };