斯威夫特：設置大膽使用setTitleTextAttributes的範圍

Question

如何創建一個按鈕像如下：

[計數： 1]

其中count：大膽而1是純文本。

let range = NSMakeRange(0,7) 
let attrs = [NSFontAttributeName:UIFont.boldSystemFontOfSize(12)] 
leftNameButton.setTitleTextAttributes(attrs, forState: UIControlState.Normal) 
// Where does range go? 

Answer 1

你需要如果你想這對工作的UIBarButtonItem使用NSMutableAttributedString

let yourString = NSMutableAttributedString(string: "[Count:1]",attributes: attrs!]) 

yourString.addAttribute(attrs!, range: range) 

yourButton.text = yourString 

Answer 2

你需要使用一個customView像這樣：

let yourString = NSMutableAttributedString(string: "Count: 1") 
yourString.setAttributes(attrs, range: range) 
let buttonLabel = UILabel() 
buttonLabel.attributedText = yourString 
buttonLabel.sizeToFit() // Important for bar buttons 
let barButton = UIBarButtonItem(customView: buttonLabel)