Calling the Emoji & Symbols picker from NSButton action

问题

I am new to working in Swift, and am currently working on a small messaging application for macOS. The basic application is complete, but I'm trying to add an emoji picker.

I want to add a button that brings up the "Emoji & Symbols" window. This is automatically added to the "Edit" Menu upon starting the application, but I was hoping to have it pop-up via an NSButton press (like in the native Mac Messages app).

Is there a way to call a system function to show the emoji picker, or perhaps a way to simulate the keyboard shortcut(ctrl+cmd+space)? And if so, what steps would I need to take to implement it?

回答1:

sussed it out thanks to the suggestion to use keyboard shortcuts.

Included below is the code I used. I had trouble simulating two modifier keys being pressed, so the solution was to create a custom CGEventFlags item.

// Setup a custom CGEventFlags Item with value of .MaskControl and .MaskCommand
    let commandControlMask = (CGEventFlags.MaskCommand.rawValue | CGEventFlags.MaskControl.rawValue)
    let commandControlMaskFlags = CGEventFlags(rawValue: commandControlMask)!

    // Press Space key once
    let space = CGEventSourceCreate(.HIDSystemState)
    let keyDown = CGEventCreateKeyboardEvent(space, 49 as CGKeyCode, true)
    CGEventSetFlags(keyDown, commandControlMaskFlags)
    CGEventPost(.CGHIDEventTap, keyDown)
    let keyUp = CGEventCreateKeyboardEvent(space, 49 as CGKeyCode, false)
    CGEventSetFlags(keyUp, commandControlMaskFlags)
    CGEventPost(.CGHIDEventTap, keyUp)

来源：https://stackoverflow.com/questions/38611925/calling-the-emoji-symbols-picker-from-nsbutton-action