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尽管我们的developer网站有丰富的API介绍，但是，有些API的介绍可能并不全，有些API也在不断地演进中。为了得到更详细的API，我们可以通过如下的命令来得到更加详细的信息。比如我们对“SingleDownload”API来得到更加多的信息。
$qmlplugindump Ubuntu.DownloadManager 0.1
显示的结果如下：
import QtQuick.tooling 1.1
// This file describes the plugin-supplied types contained in the library.
// It is used for QML tooling purposes only.
//
// This file was auto-generated by:
// ‘qmlplugindump Ubuntu.DownloadManager 0.1‘
Module {
Component {
name: "Ubuntu::DownloadManager::DownloadError"
prototype: "QObject"
exports: ["Error 0.1"]
exportMetaObjectRevisions: [0]
Property { name: "type"; type: "string"; isReadonly: true }
Property { name: "message"; type: "string"; isReadonly: true }
}
Component {
name: "Ubuntu::DownloadManager::SingleDownload"
prototype: "QObject"
exports: ["SingleDownload 0.1"]
exportMetaObjectRevisions: [0]
Property { name: "autoStart"; type: "bool" }
Property { name: "errorMessage"; type: "string"; isReadonly: true }
Property { name: "isCompleted"; type: "bool"; isReadonly: true }
Property { name: "downloadInProgress"; type: "bool"; isReadonly: true }
Property { name: "allowMobileDownload"; type: "bool" }
Property { name: "throttle"; type: "qulonglong" }
Property { name: "progress"; type: "int"; isReadonly: true }
Property { name: "downloading"; type: "bool"; isReadonly: true }
Property { name: "downloadId"; type: "string"; isReadonly: true }
Property { name: "headers"; type: "QVariantMap" }
Signal {
name: "canceled"
Parameter { name: "success"; type: "bool" }
}
Signal {
name: "finished"
Parameter { name: "path"; type: "string" }
}
Signal {
name: "paused"
Parameter { name: "success"; type: "bool" }
}
Signal {
name: "processing"
Parameter { name: "path"; type: "string" }
}
Signal {
name: "progressReceived"
Parameter { name: "received"; type: "qulonglong" }
Parameter { name: "total"; type: "qulonglong" }
}
Signal {
name: "resumed"
Parameter { name: "success"; type: "bool" }
}
Signal {
name: "started"
Parameter { name: "success"; type: "bool" }
}
Signal {
name: "errorFound"
Parameter { name: "error"; type: "DownloadError&" }
}
Signal { name: "errorChanged" }
Method {
name: "registerError"
Parameter { name: "error"; type: "Error"; isPointer: true }
}
Method {
name: "bindDownload"
Parameter { name: "download"; type: "Download"; isPointer: true }
}
Method {
name: "unbindDownload"
Parameter { name: "download"; type: "Download"; isPointer: true }
}
Method {
name: "onFinished"
Parameter { name: "path"; type: "string" }
}
Method {
name: "onProgress"
Parameter { name: "received"; type: "qulonglong" }
Parameter { name: "total"; type: "qulonglong" }
}
Method {
name: "onPaused"
Parameter { name: "wasPaused"; type: "bool" }
}
Method {
name: "onResumed"
Parameter { name: "wasResumed"; type: "bool" }
}
Method {
name: "onStarted"
Parameter { name: "wasStarted"; type: "bool" }
}
Method {
name: "onCanceled"
Parameter { name: "wasCanceled"; type: "bool" }
}
Method { name: "start" }
Method { name: "pause" }
Method { name: "resume" }
Method { name: "cancel" }
Method {
name: "download"
Parameter { name: "url"; type: "string" }
}
}
Component {
name: "Ubuntu::DownloadManager::UbuntuDownloadManager"
prototype: "QObject"
exports: ["DownloadManager 0.1"]
exportMetaObjectRevisions: [0]
Property { name: "autoStart"; type: "bool" }
Property { name: "cleanDownloads"; type: "bool" }
Property { name: "errorMessage"; type: "string"; isReadonly: true }
Property { name: "downloads"; type: "QVariantList"; isReadonly: true }
Signal { name: "errorChanged" }
Method {
name: "download"
Parameter { name: "url"; type: "string" }
}
}
}
我们通过使用“finished”信号可以得到下载完成的事件而进行分别的处理！
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原文地址：http://blog.csdn.net/ubuntutouch/article/details/44221625
