代碼（XIB）實現UIButton、UILabel文字添加下劃線小技巧

UILabel設置下劃線:app UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 100, 310, 50)]; label.backgroundColor = [UIColor redColor]; [label setLineBreakMode:NSLineBreakByWordWrapping]; label.nu

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