导航栏的标题视图重叠

  • Z时代
  • 2024-01-10
  • 分类：问答

我在导航栏中添加了自定义的标题视图。导航栏的标题视图重叠

在每次屏幕更改时，我都会添加另一个标题视图。

问题是前一个没有被删除，我可以一次查看所有视图。

这里是我的代码：

UILabel *lblTitle = [[UILabel alloc] init]; 
lblTitle.text = text; 
CGSize lblSize = [Utility sizeOfText:text withFont:kCGFontMedium(19)]; 
lblTitle.frame = CGRectMake(60, 9, lblSize.width, lblSize.height); 
lblTitle.font =kCGFontMedium(19); 
lblTitle.backgroundColor = [UIColor clearColor]; 
lblTitle.textColor = [UIColor whiteColor]; 
[lblTitle sizeToFit]; 
    [self.navigationController.navigationBar addSubview:lblTitle];

我的问题： 注册并登录，重叠

回答：

解决方案1：每次你要删除自定义的UIView对象时添加到导航栏

[self.navigationController.navigationBar.subviews enumerateObjectsWithOptions:0 usingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { 
    if ([obj isMemberOfClass:[UILabel class]]) { 
     [obj removeFromSuperview]; 
    } 
}]; 
UILabel *lblTitle = [UILabel new]; 
lblTitle.text = text; 
CGSize lblSize = [Utility sizeOfText:text withFont:kCGFontMedium(19)]; 
lblTitle.frame = CGRectMake(60, 9, lblSize.width, lblSize.height); 
lblTitle.font = kCGFontMedium(19); 
lblTitle.backgroundColor = [UIColor clearColor]; 
lblTitle.textColor = [UIColor whiteColor]; 
[lblTitle sizeToFit]; 
[self.navigationController.navigationBar addSubview:lblTitle];

解决方案2：在类接口中添加属性以存储对自定义子视图的访问EW中的导航栏

@property (weak, readwrite, nonatomic) UILabel *navSubView; 
[self.lblTitle removeFromSuperview]; 
self.lblTitle = [UILabel new]; 
lblTitle.text = text; 
CGSize lblSize = [Utility sizeOfText:text withFont:kCGFontMedium(19)]; 
lblTitle.frame = CGRectMake(60, 9, lblSize.width, lblSize.height); 
lblTitle.font = kCGFontMedium(19); 
lblTitle.backgroundColor = [UIColor clearColor]; 
lblTitle.textColor = [UIColor whiteColor]; 
[lblTitle sizeToFit]; 
[self.navigationController.navigationBar addSubview:lblTitle];

回答：

或者你可以只使用NavigationItem的 “titleview的” 属性

的UILabel * titleLabel = [[的UILabel的alloc]初始化]。你可以使用下面的代码来实现这个功能：* titleView = [[UIView alloc] initWithFrame：titleLabel.frame]; [titleView addSubview：titleLabel];

self.navigationItem.titleView = titleView;

这将确保只有一个标题标签的实例存在，它不会重叠self.title要么

以上是 导航栏的标题视图重叠 的全部内容， 来源链接： utcz.com/qa/261390.html

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