长UIButton的标题标签截断的中心，而不是右边

Question

我测试下面的代码：

username = @"addagkagalkjagjalggxxaklgjagjglkjag"; 

NSString *fullUsername = [NSString stringWithFormat:@"%@%@", @"@", username]; 

UIButton *usernameButton = [UIButton buttonWithType:UIButtonTypeSystem]; 
[usernameButton setTitle:fullUsername forState:UIControlStateNormal]; 

usernameButton.frame = CGRectMake(100.0, 10.0, 215.0, 25.0); 

最终结果截断和省略号在标签的中心。我最终需要它，但是我必须为此设置哪些属性？

Answer 1

usernameButton.titleLabel.lineBreakMode = NSLineBreakByTruncatingTail;