block

反向传值

第二个类中：

@interface NationNumberViewController : BaseViewController

@property (nonatomic, strong)void (^selectBlock)(NSString *num);

@end

 

#pragma mark ------- tableViewDelegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    if (_selectBlock) {

        _selectBlock([_tableViewDatasource[indexPath.section] objectForKey:@"data"][indexPath.row][2]);

    }

    [self.navigationController popViewControllerAnimated:YES];

}

 第一个类中：

-(void)arrowBtnClick:(NationBtn *)button

{

    NationNumberViewController * nationVC=[[NationNumberViewController alloc]init];

    nationVC.selectBlock=^(NSString *num){

        [button setTitle:num forState:UIControlStateNormal];

    };

    [self.navigationController pushViewController:nationVC animated:YES];

}

 赋值

  NationBtn * nationBtn=[[NationBtn alloc]initWithFrame:CGRectMake(15, 0, 80, 44)];

    if (nationBtn.titleLabel.text.length==0) {

        [nationBtn setTitle:@"+86" forState:UIControlStateNormal];

    }

        __block NationBtn *myTell = nationBtn;

        _nation.selectBlock = ^(NSString *num){

            // 在这里设置 下面TextField 区号就好了

            [myTell setTitle:num forState:UIControlStateNormal];

        };

    [nationBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

    [nationBtn setImage:[UIImage imageNamed:@"arrow"] forState:UIControlStateNormal];

    [nationBtn addTarget:self action:@selector(arrowBtnClick:) forControlEvents:UIControlEventTouchUpInside];

    [registerBg addSubview:nationBtn];

    

 

转载于:https://www.cnblogs.com/momosmile/p/5287555.html