无法在UIButton上进行自动换行

Question

我有一个简单的UIButton并试图得到自动换行但它总是在一行中显示超过按钮大小的文本.

 NSString * text = NSLocalizedString(@"Start Loading",@"Start Loading");
_continueBtn.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
_continueBtn.titleLabel.textAlignment = NSTextAlignmentCenter;
[_continueBtn setTitle:text forState:UIControlStateNormal];

同样在UI构建器中,当我设置自动换行时,文本换行 - 只有当我运行应用程序时,文本才会出现在一行中.

我错过了什么？

Answer 1

尝试:

_continueBtn.titleLabel.numberOfLines = 0;

我试过下一个代码:

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(20, 20, 70, 50);
button.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
button.titleLabel.textAlignment = NSTextAlignmentCenter;
[button setTitle:@"start loading"
        forState:UIControlStateNormal];
[self.view addSubview:button];

它对我有用: