objective-c - 以编程方式在 UIViewController 中的 UINavigationBar 中设置左右标签

Question

我正在尝试以编程方式在我的 UIViewController 实现中添加两个标签 - 一个在 UINavigationBar 的左侧，一个在右侧。但是当我运行我的程序时它没有出现。我有一个嵌入在 UINavigationController 中的 UIViewController。我正在使用以下代码：

- (void) setTheNavigationbarView{

    CGFloat originX = self.navigationItem.titleView.bounds.origin.x;
    CGFloat originY = self.navigationItem.titleView.bounds.origin.y;
    CGFloat sizeW = self.navigationItem.titleView.bounds.size.width;
    CGFloat sizeH = self.navigationItem.titleView.bounds.size.height;

    UIView * navigationbarView = [[UIView alloc] initWithFrame:CGRectMake(originX + 1, originY + 1, sizeW - 2, sizeH - 2)];
    navigationbarView.backgroundColor = [UIColor clearColor];


    UILabel *labelLeft = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, (sizeW - 2)/2, (sizeH - 2))] autorelease];
    labelLeft.backgroundColor = [UIColor clearColor];
    labelLeft.font = [UIFont boldSystemFontOfSize:16];
    labelLeft.adjustsFontSizeToFitWidth = NO;
    labelLeft.textAlignment = UITextAlignmentLeft;
    labelLeft.textColor = [UIColor blackColor];
    labelLeft.text = @"first line";
    labelLeft.highlightedTextColor = [UIColor blackColor];
    [navigationbarView addSubview:labelLeft];

    UILabel *labelRight = [[[UILabel alloc] initWithFrame:CGRectMake(((sizeW - 2)/2 + 1), 0, (sizeW - 2)/2, (sizeH - 2))] autorelease];
    labelRight.backgroundColor = [UIColor clearColor];
    labelRight.font = [UIFont boldSystemFontOfSize:16];
    labelRight.adjustsFontSizeToFitWidth = NO;
    labelRight.textAlignment = UITextAlignmentRight;
    labelRight.textColor = [UIColor blackColor];
    labelRight.text = @"second line";
    labelRight.highlightedTextColor = [UIColor blackColor];
    [navigationbarView addSubview:labelRight];

    // set the view as navigationba title view
    self.navigationItem.titleView = navigationbarView;
}

我将不胜感激。谢谢。

Answer 1

我测试您的代码及其对我的工作，我只会检查您的框架是否不大于您的 navigaitonController 的每个大小。