我看过很多的Qt代码，里面有时会用到Qt.resolvedUrl．有时候不仔细想，还真是一知半解．看了Qt的文档：
url resolvedUrl(url url)
Returns url resolved relative to the URL of the caller.
你可能还会是一头雾水．这样吧，我们还是利用一个简单的例程来说们问题：\
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Image {
anchors.fill: parent
source: "images/girl.jpg"
Component.onCompleted: {
// This prints 'false'. Although "pics/logo.png" was the input string,
// it's been converted from a string to a URL, so these two are not the same.
console.log(source == "images/girl.jpg")
// This prints 'true' as Qt.resovledUrl() converts the string into a
// URL with the correctly resolved path
console.log("resolvedurl: " + Qt.resolvedUrl("images/girl.jpg"))
console.log(source == Qt.resolvedUrl("images/girl.jpg"))
// This prints the absolute path, e.g. "file:///path/to/pics/logo.png"
console.log(source.toString())
}
}
上面的例程中，我们在Image中显示另一个女孩的照片．从代码中可以看出来，它明显使用的是相对路径．虽然我们输入的是相对路径，当它被输入到一个url的类型的属性时（比如 Image中的source)，它将被转换为一个QUrl的对象．如果我们直接把url中的内容和我们输入的内容相比较的话，就会失败．比如上面的代码的输出结果是：
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Starting /usr/ubuntu-sdk-dev/bin/qmlscene...
qml: false
qml: resolvedurl: file:///home/liuxg/qml/resolveurl/images/girl.jpg
qml: true
qml: file:///home/liuxg/qml/resolveurl/images/girl.jpg
从上面的代码中可以看出来，使用Qt.resolvedUrl可以把我们的相对路径的url转换为绝对路径的path．
整个项目的源码在：github.com/liu-xiao-gu…
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