协议用法

来源：互联网发布：淘宝客新建定向计划编辑：程序博客网时间：2024/06/18 03:40

协议就是让别的类干一些自己类干不了的事，比如 cell 不能push VC 那么就让VC 去干

1. 在cell 里面声明协议方法并设置成属性记得在 interface 上面所以必须加上 calss

@class DiscoverCellHeadView;@protocol CollectBtnDelgate <NSObject>/** *  收藏点击 代理 * *  @param view <#view description#> */-(void)collectBtnClick:(DiscoverCellHeadView *)view WithRquest:(BOOL)request WithResultDescr:(NSString *)resultDescr;@end

2.设置成属性

@interface DiscoverCellHeadView : UIView<DLImageViewDelegate>@property (nonatomic, weak) id <CollectBtnDelgate> delgatecCollectBtn;  //代理

比如在一个cell 点击button 的时候调用记得传一下3个参数需要几个自己修改

if ([self.delgatecCollectBtn conformsToProtocol:@protocol(CollectBtnDelgate)] && [_delgatecCollectBtn respondsToSelector:@selector(collectBtnClick:WithRquest:WithResultDescr:)])    {        [self.delgatecCollectBtn collectBtnClick:self WithRquest:YES WithResultDescr:nil];    }

3.回去 VC 调用声明协议

@interface DiscoverVC : DLBaseAMTVC <CollectBtnDelgate>

4.设置代理

DiscoverJokeCell *cell = (DiscoverJokeCell *)[tableView dequeueReusableCellWithIdentifier:cellJokeIdentify];            if (!cell) {                cell = [[[NSBundle mainBundle] loadNibNamed:@"DiscoverJokeCell" owner:self options:nil] objectAtIndex:0];            }            cell.headView.delgatecCollectBtn = self;

5.代理方法

#pragma mark --headView 代理方法-(void)collectBtnClick:(DiscoverCellHeadView *)view WithRquest:(BOOL)request WithResultDescr:(NSString *)resultDescr{    ContentResponseModel *model = [_dataArray objectAtIndex:view.model.info.cellRow];    model.info.isCollect = view.model.info.isCollect;        if (request) {        if (model.info.isCollect == 1) {            [self presentMessageTips:@"添加收藏成功~"];        }        else        {            [self presentMessageTips:@"取消收藏成功~"];        }    }    else    {        [self presentMessageTips:resultDescr];    }}

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