Dear Apple developers:
Hello, recently I want to develop an application for macos that automatically switches input methods. The function is that when you switch applications, it can automatically switch to the input method you set, thus eliminating the trouble of manual switching.
All the functions have been implemented, but only when the sandbox is closed. When I opened the sandbox, I found a very strange phenomenon. Suppose wechat was set to the Chinese input method. When I switched to wechat, wechat automatically got the focus of the input box. The input method icon in the upper right corner of the screen had actually switched successfully, but when I actually input, it was still the previous input method. If you switch to an application that does not have a built-in focus, the automatic switching of the input method will take effect when you click the input box with the mouse to regain the focus. This phenomenon is too difficult for my current technical level.
I have tried many methods but none of them worked. I hope the respected experts can offer some ideas. Below is a snippet of the code switching I provided:
DispatchQueue. Main. AsyncAfter (deadline: now () + 0.1) {
let result = TISSelectInputSource(inputSource)
if result == noErr {
print(" Successfully switched to input method: \(targetInputMethod)")
} else {
print(" Input method switch failed. Error code: \(result)")
}
// Verify the switching result
if let newInputSource = getCurrentInputSource() {
print(" Switched input method: (newInputSource)")
}
}
When the sandbox is opened, the synchronous switching does not take effect. The input method icon in the status bar will flash for a moment, unable to compete with system events. Even if it is set to DispatchQueue.main.async, it still does not work. It seems that there is a timing issue with the input method switching.
Development environment
macOS version: 15.4.1
Xcode version: 16.2
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I am trying to write a MacOS app which switch input methods by previously assigned shortcut(command+space in here). Switching input methods preoperly works so that the language icon at the status bar(top right) immediately changes as I put the shortcut. The problem I got in here is that the actual input method does not change. For example, if I run my app when the selected input method is Korean, then although the status bar is showing the selected input method is Japanese after command+space, what I can only type is Korean characters. However, after I change focus to another text app(e.g. from sublime text to xcode), only then the selected input method is reflected well. I am using MacOS Monterey 12.6 and Xcode 13.1.
My project contains two source files. The code in the file AppDelegate.swift is as follows:
import Cocoa
@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var switcher = Switcher()
}
And the code in the file Switcher.swift is as follows:
import Cocoa
import MASShortcut
class Switcher{
var lang: Int = 0
var kr: TISInputSource?
var jp: TISInputSource?
var en: TISInputSource?
init(){
let inputSourceNSArray = TISCreateInputSourceList(nil, false).takeRetainedValue() as NSArray
let inputSourceList = inputSourceNSArray as! [TISInputSource]
for inputSource in inputSourceList {
if inputSource.id == "com.apple.inputmethod.Korean.2SetKorean" {
self.kr = inputSource
}
if inputSource.id == "com.apple.inputmethod.Kotoeri.RomajiTyping.Japanese" {
self.jp = inputSource
}
if inputSource.id == "com.apple.keylayout.ABC" {
self.en = inputSource
}
}
self.register()
}
func switchLang(){
self.lang = (self.lang + 1) % 3
switch lang {
case 0:
TISSelectInputSource(self.kr)
case 1:
TISSelectInputSource(self.jp)
case 2:
TISSelectInputSource(self.en)
default:
print("error")
}
}
func register() {
let langShortcut = MASShortcut(keyCode: kVK_Space, modifierFlags: [.command])
MASShortcutMonitor.shared()?.register(langShortcut, withAction: {
self.switchLang()
})
}
}
I wrote these codes by referring KAWA, but KAWA does not make this issue. I have analyzed all codes of KAWA several times, I couldn't find out why the same problem does not occur in KAWA. I am quite new to Swift, and I have no idea to approach. Could you help me....? Thank you.