如何在一個qmldir文件中放置多個單身人士？

Question

我想在一個qmldir文件中使用多個單例，但它似乎不起作用，我沒有錯誤，但程序無法啓動。

qmldir：

singleton File1 1.0 File.qml 
singleton File2 1.0 File2.qml 

主：

import QtQuick 2.7 
import QtQuick.Controls 2.1 
import '.' 
Window{ 
    visible:true 
    width:640 
    height:480 
    title: qstr("hello world!") 

    Button{ 

     onCliked: File2.test(); 
    } 
} 

File2.qml：

pragma Singleton 
import QtQuick 2.7 
import QtQuick.Controls 2.1 
Item{ 
    signal test; 
    onTest:console.log("File2 received signal"); 
} 

File1.qml：

pragma Singleton 
import QtQuick 2.7 
import QtQuick.Controls 2.1 
Item{ 
    signal test; 
    onTest:console.log("File1 received signal"); 
} 

代碼工作，如果我刪除qmldir第二線，但隨後file2將和undifined

Answer 1

如果您qmldir文件是完全按照你寫：

Singleton File1 1.0 File.qml 
Singleton File2 1.0 File2.qml 

的錯誤可能位於內，隨着關鍵字是singleton，而不是Singleton。

試一下：

singleton File1 1.0 File.qml 
singleton File2 1.0 File2.qml 

但是誤差不應靜默失敗。應該有一些錯誤：

[main.qml] a component declaration requires two or three arguments, but 4 were provided
[qmldir] a component declaration requires two or three arguments, but 4 were provided

//main.qml

import QtQuick 2.7 
import QtQuick.Controls 2.0 
import '.' 

ApplicationWindow { 
    id: window  
    width: 800 
    height: 600 
    visible: true  
    Row { 
     spacing: 3 
     Button { 
      text: 'single1' 
      onClicked: Single.sig() 
     } 

     Button { 
      text: 'signle2' 
      onClicked: Single2.sig() 
     } 
    }  
} 

//singleton.qml

pragma Singleton 
import QtQuick 2.0 
QtObject { 
    signal sig 
    onSig: console.log('Singleton1 Received') 
} 

//singleton2.qml

pragma Singleton 
import QtQuick 2.0 
QtObject { 
    signal sig 
    onSig: console.log('Singelton2 Received') 
} 

// qmldir

singleton Single 1.0 singleton.qml 
singleton Single2 1.0 singleton2.qml 

---

就像一個魅力。