Question

如何使用Swift以编程方式选择NSTextField中的所有文本？

对于UITextField，有一个类似

的方法

textField.selectedTextRange = textField.textRangeFromPosition(...)

Answer 1

在操场上试试这个：

import XCPlayground
import AppKit

let view = NSView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))

XCPShowView("view", view)

let txtf = NSTextField(frame: CGRect(x: 50, y: 50, width: 200, height: 50))

view.addSubview(txtf)

txtf.stringValue = "falling asleep at the keyboard..."

txtf.selectText(nil) // Ends editing and selects the entire contents of the text field

var txt = txtf.currentEditor() // returns an NSText

txt.selectedRange // --> (0,33)

按住selectedRange，然后点击NSText（其返回类型），这会跳转到其Swiftened标题，您可以在其中查看其丰富的功能...

Answer 2

更好的解决方案：

import Cocoa

class TextFieldSubclass: NSTextField {
    override func mouseDown(theEvent: NSEvent) {
        super.mouseDown(theEvent)
        if let textEditor = currentEditor() {
            textEditor.selectAll(self)
        }
    }
}

或者是为了精确选择：

import Cocoa

class TextFieldSubclass: NSTextField {
    override func mouseDown(theEvent: NSEvent) {
        super.mouseDown(theEvent)
        if let textEditor = currentEditor() {
            textEditor.selectedRange = NSMakeRange(location, length)
        }
    }
}

适合我：

import Cocoa

class TextFieldSubclass: NSTextField {
    override func becomeFirstResponder() -> Bool {
        let source = CGEventSourceCreate(CGEventSourceStateID.HIDSystemState)
        let tapLocation = CGEventTapLocation.CGHIDEventTap
        let cmdA = CGEventCreateKeyboardEvent(source, 0x00, true)
        CGEventSetFlags(cmdA, CGEventFlags.MaskCommand)
        CGEventPost(tapLocation, cmdA)
        return true
    }
}

使用Swift选择NSTextField中的所有文本

2 个答案: