Titanium 消息="'；未定义'；不是函数（计算'；bookview.open（）'；）”；钛合金

我是泰坦尼克号的新手，目前正在跟随官方的脚步，但我在这个阶段就开始了

function showBook(event) {
    var selectedBook = event.source;var args = {
        title: selectedBook.title,
        author: selectedBook.author
    };
    var bookview = Alloy.createController("bookdetails", args).getView();
    bookview.open();
}      

当我尝试使用ios模拟器运行时，我有点陷入了上面的阶段，出现了以下错误

  Script Error {
[ERROR] :      backtrace = "#0 () at :0";
[ERROR] :      line = 27;
[ERROR] :      message = "'undefined' is not a function (evaluating 'bookview.open()')";
[ERROR] :      name = TypeError;
[ERROR] :      sourceId = 344963552;
[ERROR] :      sourceURL = "file:///Users/hivelocity/Library/Application%20Support/iPhone%20Simulator/7.1/Applications/6B8062FB-B379-407A-8553-184EED274850/FaveBooks.app/alloy/controllers/index.js";
[ERROR] :  }

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确保bookdetails是一个窗口而不是视图

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要进行检查，只需打开bookdetails.xml并检查窗口的标记是否存在。

但如果它是一个窗口，并且我遇到了相同的错误，该怎么办？