[英]How to set first responder for NSTextView in Swift?
Edit: in a macOS project 编辑:在macOS项目中
I have a simple ViewController which I display as popover on a status item menu app. 我有一个简单的ViewController,它在状态项菜单应用程序上显示为弹出框。
I change the text of the view text with a NSTableView, depending of which item is clicked. 我使用NSTableView更改视图文本的文本,具体取决于单击的项目。 The code I use is similar to this one:
我使用的代码与此类似:
mainTextField.insertText(newStr, replacementRange: theRange)
(I use insertText for the purpose to have the change recorded in undo manager) (我使用insertText的目的是将更改记录在撤消管理器中)
Then I highlight the text: 然后我突出显示文本:
// create the new NSRange
let range = NSRange(location: startRange, length: newStrLength)
// select the range in field
mainTextField.selectedRange = range
All work fine, except that the text is highlighted but with a light grey instead of the usual sky blue, indicating that the control is not the first responder. 所有操作均正常,但突出显示了文本,但使用了浅灰色而不是通常的天蓝色,表明该控件不是第一响应者。 And when I click on the field the selection disappear.
当我单击该字段时,选择消失。
Actually I would like that the NSTextView becomes first responder so I can directly copy the selected text. 实际上,我希望NSTextView成为第一响应者,因此我可以直接复制所选文本。
Edit: if I press Tab key on the keyboard I got the textView to become first responder (and the grey selection becomes standard sky blue). 编辑:如果我按键盘上的Tab键,我将使textView成为第一响应者(灰色选择变为标准的天蓝色)。
In AppKit, you need: 在AppKit中,您需要:
if mainTextField.acceptsFirstResponder {
mainTextField.window?.makeFirstResponder(mainTextField)
}
In this case, it's probably safe to not check acceptsFirstResponder
, but it doesn't hurt either. 在这种情况下,不检查
acceptsFirstResponder
可能是安全的,但也不会造成伤害。
UIKit
) UIKit
) You need to call mainTextField.becomeFirstResponder()
. 您需要调用
mainTextField.becomeFirstResponder()
。
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