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swift - 如何以编程方式将根视图控制器添加到 macOS？

问题描述

我想弄清楚如何在 macOS 上设置根视图控制器。这有点令人困惑，我也遇到了一些错误。我确实遵循了一些 iOS 指南并尝试查看有关 Mac 指南的其他一些帖子。但我正在处理这些错误。在 Info.plist 中，我的主故事板文件也设置为“Main”，我应该删除它吗？我是 macOS 方面的新手。

我正在使用 AppKit 而不是 Apple 最新的 SwiftUI 库。所以这是我正在处理的事情。我非常感谢任何提供帮助的人！:)

这是我的 AppDelegate 文件。

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

var window: NSWindow?


func applicationDidFinishLaunching(_ aNotification: Notification) {
    // Insert code here to initialize your application
    
    let storyBoard = NSStoryboard(name: NSStoryboard.Name("Main"), bundle: Bundle.main)
    let homeViewController = storyBoard.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier("ViewController")) as! ViewController
    NSApp.keyWindow?.contentViewController = homeViewController
    
}

func applicationWillTerminate(_ aNotification: Notification) {
    // Insert code here to tear down your application
}


}

这是我得到的错误：

2020-11-06 01:24:11.985119-0800 avengers[53735:1621559] Failed to set (contentViewController) user defined inspected property on (NSWindow): Unable to activate constraint with anchors <NSLayoutXAxisAnchor:0x600002a0f940 "NSTextView:0x7fecb041f8b0.centerX"> and <NSLayoutXAxisAnchor:0x600002a0c040 "NSView:0x7fecb0609d80.centerX"> because they have no common ancestor.  Does the constraint or its anchors reference items in different view hierarchies?  That's illegal.

2020-11-06 01:24:12.028071-0800 avengers[53735:1621559] Storyboard (<NSStoryboard:0x600003d08320 path='/Users/jazilzaim/Library/Developer/Xcode/DerivedData/avengers-gixxxwjnvqcwkreksxccdalagqme/Build/Products/Debug/avengers.app/Contents/Resources/Base.lproj/Main.storyboardc', initialController='NSWindowController-B8D-0N-5wS'>) doesn't contain a controller with identifier 'ViewController'

这是我的视图控制器。

import Cocoa

class ViewController: NSViewController {

let labelTxt: NSText = {
    let text = NSText()
    text.string = "Hello"
    text.translatesAutoresizingMaskIntoConstraints = false
    return text
}()


override func viewDidLoad() {
    super.viewDidLoad()

    
    labelTxt.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
    labelTxt.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
    labelTxt.topAnchor.constraint(equalTo: view.topAnchor, constant: 150).isActive = true
    self.view.addSubview(labelTxt)
    
}

override var representedObject: Any? {
    didSet {
    // Update the view, if already loaded.
    }
}


}

标签： swiftmacosappkit

解决方案

您以编程方式创建 vc 所以替换

let storyBoard = NSStoryboard(name: NSStoryboard.Name("Main"), bundle: Bundle.main)
let homeViewController = storyBoard.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier("ViewController")) as! ViewController

和

let homeViewController = ViewController()

此外，您应该在进行约束之前添加子视图

self.view.addSubview(labelTxt)
labelTxt.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
labelTxt.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
labelTxt.topAnchor.constraint(equalTo: view.topAnchor, constant: 150).isActive = true

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