objective-c – 创建和隐藏UILabel
发布时间:2020-12-14 17:39:47 所属栏目:百科 来源:网络整理
导读:我以编程方式创建了一个UILabel并触发了一个我想要隐藏相同标签的按钮.这是我的代码: UILabel *nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,100,320,100)];nameLabel.text = @"TEXT";nameLabel.backgroundColor = [UIColor greenColor];nameL
我以编程方式创建了一个UILabel并触发了一个我想要隐藏相同标签的按钮.这是我的代码:
UILabel *nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,100,320,100)]; nameLabel.text = @"TEXT"; nameLabel.backgroundColor = [UIColor greenColor]; nameLabel.numberOfLines = 5; nameLabel.font = [UIFont boldSystemFontOfSize:12]; [self.view addSubview:nameLabel]; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Hide" style:UIBarButtonItemStyleBordered target:self action:@selector(back)]; - (IBAction)back{ self.navigationItem.rightBarButtonItem=nil; [nameLabel setHidden: YES]; not working nameLabel.hidden = YES; not working } 我错过了什么吗? 解决方法
这也是另一种做法
UILabel *nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,100)]; nameLabel.text = @"TEXT"; nameLabel.tag = 1001; nameLabel.backgroundColor = [UIColor greenColor]; nameLabel.numberOfLines = 5; nameLabel.font = [UIFont boldSystemFontOfSize:12]; [self.view addSubview:nameLabel]; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Hide" style:UIBarButtonItemStyleBordered target:self action:@selector(back)]; - (IBAction)back{ self.navigationItem.rightBarButtonItem=nil; UILabel *tempLabel = (UILabel *)[self.view viewWithTag:1001]; [tempLabel setHidden: YES]; tempLabel.hidden = YES; } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |