当 backBarButtonItem 有长文本时显示“...”

Question

我是 iOS 编程的新手。我使用应用程序使用 导航栏，并为 Back 按钮设置文本，如下所示：

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"my text" style:UIBarButtonItemStyleBordered target:nil action:nil];

它工作正常。但是，当我的文本很长时会出现问题，backBarButtonItem 显示默认文本是 Back。

所以，问题是：如何在 backBarButtonItem 中显示长文本，也许显示“...”而不是全文。或者我可以使用自定义视图替换默认导航栏吗？

P/s : 我已经推荐了"back" text displayed in iOS7 UINavigationBar when view title is long 但它对我解决这个问题没有帮助。

Answer 1

试试这个

self.navigationItem.hidesBackButton = YES;
UIButton *btnLeft=[UIButton buttonWithType:UIButtonTypeCustom];
btnLeft.frame=CGRectMake(0, 0, button.widh, button.height);
[btnLeft addTarget:self action:@selector(onClickBackBarItem:) forControlEvents:UIControlEventTouchUpInside];
[btnLeft setTitle:@"YOUR TEXT"  forState:UIControlStateNormal];
btnLeft.titleLabel.font  = [UIFont fontWithName:@"font_name" size:25.0];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:btnLeft];

希望对你有帮助

Answer 2

使用sizeToFit在UIButton中显示全文

    UIButton *btnBack = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 20) ];
    [btnBack setTitle:@"Skip" forState:UIControlStateNormal];
    btnBack.titleLabel.font = [UIFont fontWithName:@"SFUIText-Medium" size:15];
    [btnBack sizeToFit];
    [btnBack addTarget:self action:@selector(backActionEvent:) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:btnSkip];