传递JavaScript数组来的UILabel - iOS设备 [英] Passing Javascript Array to UILabel - iOS

问题描述

我在本地的HTML文件JavaScript数组在我的应用程序：

I have a javascript array in a local HTML file in my app:

//js

<script language="javascript">
    test = ["First menu item","second menu item", "third menu item"];
</script>

和我想通过这个数组iOS中一个UILabel上。我怎么能去这样做？

and I would like to pass on this array to a UILabel in iOS. How could I go about doing this?

先谢谢了！

推荐答案

我可以与下面的步骤来做到这一点：

I was able to do this with the steps below:

1. 首先，改变你的字符串数组的JavaScript在短短的一
   字符串的方法加入（）

二，使用的WebView方法
     stringByEvaluatingJavaScriptFromString：来获得上述字符串

Second, use webview's method stringByEvaluatingJavaScriptFromString: to get the string above

最后，使用的NSString的方法 componentsSeparatedByString：
    改造中的字符串数组的iOS字符串。

Finally, using NSString's method componentsSeparatedByString: to transform the string in a iOS array of strings.

现在，你只需要使用这个数组作为UIPickerView的数据源。你可以看到如何做到这一点 >。

Now, you only have to use this array as datasource of your UIPickerView. You can see how to do this here.

这是如何code看起来像：

This is how to code would look like:

您的javascript：

Your javascript:

<script language="javascript">
    var test = ["First menu item","second menu item", "third menu item"];
    var testString = test.join('#');
</script>

您的Objective-C code：

Your objective-C code:

NSString *testArrayString = [webView stringByEvaluatingJavaScriptFromString:@"testString"];
NSArray *testArray = [testArrayString componentsSeparatedByString:@"#"]; 
NSLog(@"%@", testArray);

下面是什么的NSLog会打印：

Here's what the NSLog will print:

2013-08-20 23:48:29.578 YourProject3633:c07] (
    "First menu item",
    "second menu item",
    "third menu item"
)

编辑：

要显示的标签阵列的内容，而不是UIPickerView，你可以做（​​未经测试，但应工作）：

To show the array content in a label, instead of a UIPickerView, you can do (untested, but should work):

self.myLabel.text = [NSString stringWithFormat:%@, testArray];

或只是再次用逗号连接阵列的字符串，像这样的：

or simply joining the array's strings again with a comma, like this:

self.myLabel.text = [testArray componentsJoinedByString:@","];

我不知道是否有人有更好的解决办法，这是我想到的第一件事。让我知道，如果它帮你。

I don't know if someone has a better solution, this is the first thing I thought. Let me know if it helped you.

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