長UIButton的標題標籤截斷的中心，而不是右邊

Question

我測試下面的代碼：

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); 

最終結果截斷和省略號在標籤的中心。我最終需要它，但是我必須爲此設置哪些屬性？

Answer 1

usernameButton.titleLabel.lineBreakMode = NSLineBreakByTruncatingTail;