代码中回调的用法

 

//声明回调
typedef void(^discoverCreateBackBlock)(BOOL state);

@interface DiscoverCreateViewController
//定义回调
@property (nonatomic , copy) discoverCreateBackBlock finishBlock;    //发布成功回调Block
@property (nonatomic, copy) GetCameraImageBlock getCameraImageBlock;
.....
@end

//返回回调
@implementation DiscoverCreateViewController

#pragma mark --
#pragma mark -- HTTPRequestDelegate

- (void)request:(AFHTTPRequestOperation *)myRequest finshAction:(NSDictionary *)dic withURLTag:(NSString *)url{
    
    int code = [[dic safeObjectForKey:@"status"] intValue];
    if (code == 200) {
        
        //评论请求成功
        if ([url isEqualToString: DISCOVER_ADD_FOUND] ) {
            ...
            
                //[self stopLoadAnimation];
            CL_INFO(@"评论请求完成完毕");
            if (_arrayPic.count !=0 && self.needExtractPhotosForAnimation) {
                if (self.finishBlock) {
                    self.finishBlock(YES);
                }
            }
            else{
                [self onClickBack];
            }
        }
       
    }
}

@end

//使用回调
    DiscoverCreateViewController*recommed = [[DiscoverCreateViewController alloc]init];
    recommed.arrayPic = [[NSMutableArray alloc] initWithArray:nil];
    recommed.canChooseProduct = NO;
    recommed.selectedEntity = self.selectedEntity;
    recommed.isRepost = YES;
    
    [recommed setFinishBlock:^(BOOL state){
        CL_INFO(@"发布完成,刷新我的关注页面数据");
        
    }];
    
    [self.navigationController pushViewController:recommed animated:YES];