UIButtonのラベルを改行させるの方法
btn.titleLabel!.lineBreakMode = NSLineBreakMode.ByWordWrapping
btn.titleLabel!.numberOfLines = 2
btn.titleLabel!.textAlignment = NSTextAlignment.Center
UIButtonのラベルを改行させるの方法
btn.titleLabel!.lineBreakMode = NSLineBreakMode.ByWordWrapping
btn.titleLabel!.numberOfLines = 2
btn.titleLabel!.textAlignment = NSTextAlignment.Center