如何從Swift中的NSTextView中獲取選定的字符串？

Question

如何從Swift中的NSTextView中獲取選定的字符串？

// create a range of selected text 
let range = mainTextField.selectedRange() 

// this works but I need a plain string not an attributed string 
let str = mainTextField.textStorage?.attributedSubstring(from: range) 

也許我必須添加一箇中間步驟，我得到完整的字符串，然後在其上應用範圍？

Answer 1

什麼

let str = mainTextField.text.substring(with: range) 

編輯：

這應該現在的工作：

let range = mainTextField.selectedRange()  // Returns NSRange :-/ (instead of Range) 
let str = mainTextField.string as NSString? // So we cast String? to NSString? 
let substr = str?.substring(with: range)  // To be able to use the range in substring(with:) 

Answer 2

這可能是有益的給你：

let textView = NSTextView(frame: NSMakeRect(0, 0, 100, 100)) 
let attributes = [NSForegroundColorAttributeName: NSColor.redColor(), 
       NSBackgroundColorAttributeName: NSColor.blackColor()] 
let attrStr = NSMutableAttributedString(string: "my string", attributes: attributes) 
let area = NSMakeRange(0, attrStr.length) 
if let font = NSFont(name: "Helvetica Neue Light", size: 16) { 
    attrStr.addAttribute(NSFontAttributeName, value: font, range: area) 
    textView.textStorage?.appendAttributedString(attrStr) 
}