如何在中间对齐自定义 UINavigationBar 标题（UILabel）（iOS）

Posted 2023-03-13

【中文标题】如何在中间对齐自定义 UINavigationBar 标题（UILabel）（iOS）

【英文标题】：How to align custom UINavigationBar title (UILabel )in middle (iOS)

【发布时间】：2015-05-06 04:45:01

【问题描述】：

我正在使用以下代码在 UINavigationBar 中心对齐 2 个字符串。

例如：

         <Back     John Kelly Maria
                       23/F

我在 UINavigationbar 中需要这种中间对齐的文本，但现在得到的结果是所有文本都在 UINavigationBar 的右侧对齐。 像这样的

      <Back                  John Kelly Maria   
                                  23/F

请帮助..我。 这是我的代码

 UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,50)];

    UIFont * customFont = [UIFont fontWithName:@"Helvetica Neue" size:19]; //custom font
    NSString * text =title;
    UILabel *patientNameLabel;
    if([title length]>15)
        patientNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,320,30)];
    else
        patientNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,320,30)];

    
    patientNameLabel.text = @"John Kelly Maria";
    patientNameLabel.font = customFont;
    patientNameLabel.numberOfLines = 0;
    patientNameLabel.textAlignment=NSTextAlignmentCenter;
    patientNameLabel.minimumScaleFactor = 10.0f/12.0f;
    patientNameLabel.clipsToBounds = YES;
    patientNameLabel.backgroundColor = [UIColor clearColor];
    patientNameLabel.textColor = [UIColor blackColor];
    patientNameLabel.autoresizingMask = UIViewAutoresizingFlexibleHeight;
    NSString *subTitle =subTitleText;
    UIFont * customFont1 = [UIFont fontWithName:@"Helvetica Neue" size:14]; //custom font

    UILabel *subTitleLabel = [[UILabel alloc]initWithFrame:CGRectMake(0,25,320,20)];
    subTitleLabel.textAlignment = NSTextAlignmentCenter;

    subTitleLabel.text = @"23/F";
    subTitleLabel.font = customFont1;
     subTitleLabel.textAlignment=NSTextAlignmentCenter;
    subTitleLabel.numberOfLines = 1;

    subTitleLabel.adjustsFontSizeToFitWidth = YES;
    subTitleLabel.minimumScaleFactor = 10.0f/12.0f;
    subTitleLabel.clipsToBounds = YES;
    subTitleLabel.backgroundColor = [UIColor clearColor];
    subTitleLabel.textColor = [UIColor blackColor];
    [titleView addSubview:patientNameLabel];
    [titleView addSubview:subTitleLabel];

【问题讨论】：

你能把你得到的截图放上去吗，它对回答你的问题更有帮助。

好的..我会添加截图链接

【参考方案1】：

在 addSubview 行之前添加以下两行..

patientNameLabel.center = CGPointMake(titleView.frame.size.width/2, 0);
subTitleLabel.center = CGPointMake(titleView.frame.size.width/2, 25);

添加下面的代码并查看

UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(0,0,self.view.frame.size.width,50)];

UIFont * customFont = [UIFont fontWithName:@"Helvetica Neue" size:19]; //custom font
NSString * text =@"Nilesh Patel";
UILabel *patientNameLabel;
if([text length]>15)
    patientNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,320,30)];
else
    patientNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,320,30)];


patientNameLabel.text = @"Nilesh Patel";
patientNameLabel.font = customFont;
patientNameLabel.numberOfLines = 0;
patientNameLabel.textAlignment=NSTextAlignmentCenter;
patientNameLabel.minimumScaleFactor = 10.0f/12.0f;
patientNameLabel.clipsToBounds = YES;
patientNameLabel.backgroundColor = [UIColor clearColor];
patientNameLabel.textColor = [UIColor blackColor];
patientNameLabel.autoresizingMask = UIViewAutoresizingFlexibleHeight;
NSString *subTitle =@"ios Developer";
UIFont * customFont1 = [UIFont fontWithName:@"Helvetica Neue" size:14]; //custom font

UILabel *subTitleLabel = [[UILabel alloc]initWithFrame:CGRectMake(0,25,320,20)];
subTitleLabel.textAlignment = NSTextAlignmentCenter;

subTitleLabel.text = @"28/M";
subTitleLabel.font = customFont1;
subTitleLabel.textAlignment=NSTextAlignmentCenter;
subTitleLabel.numberOfLines = 1;

subTitleLabel.adjustsFontSizeToFitWidth = YES;
subTitleLabel.minimumScaleFactor = 10.0f/12.0f;
subTitleLabel.clipsToBounds = YES;
subTitleLabel.backgroundColor = [UIColor clearColor];
subTitleLabel.textColor = [UIColor blackColor];

patientNameLabel.center = CGPointMake(titleView.frame.size.width/2, 10);
subTitleLabel.center = CGPointMake(titleView.frame.size.width/2, 30);


[titleView addSubview:patientNameLabel];
[titleView addSubview:subTitleLabel];
[self.navigationController.navigationBar addSubview:titleView];

注意：您已将静态框架设置为 titleView，因此如果您在不同的设备上看到您的应用程序，您将无法在准确的中心看到文本。为避免这种情况，请根据设备/视图宽度动态设置 titleView 框架。

【讨论】：

它移到右上角（parentNameLabel 与状态栏冲突）角落...没有按我想要的方式工作

将 10 像素添加到 Y 位置.. Like.. patientNameLabel.center = CGPointMake(titleView.frame.size.width/2, 10); subTitleLabel.center = CGPointMake(titleView.frame.size.width/2, 35);

右角是什么意思？我必须在您的原始帖子中引用哪张图片？

做一件事.. 将标题视图居中。比如titleView.center = CGPointMake(self.view.frame.size.width/2, 10);

我上传截图的链接

【参考方案2】：

试试这样的框架设置

CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(0,20,screenWidth,50)];
UILabel *subTitleLabel = [[UILabel alloc]initWithFrame:CGRectMake(0,25,screenWidth,20)];
UILabel *patientNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,screenWidth,30)];