使用 Titanium Appcelerator mobile 1.7.2 添加元素后的空数组 [英] Empty array after adding elements using Titanium Appcelerator mobile 1.7.2

问题描述

我使用的是 Titanium Appcelerator 移动 API 1.7.2.

I'm using Titanium Appcelerator mobile API 1.7.2.

创建数组时，我得到了一些奇怪的结果.这是我的语法吗?

When creating an array, I'm getting some odd results. Is it my syntax?

container.textBoxArray = new Array();
container.textBoxArray[0] = createPasswordTextField(options, '0%');
container.textBoxArray[1] = createPasswordTextField(options, '25%');
Ti.API.log(container.textBoxArray == null);
Ti.API.log('len: ' + container.textBoxArray.length);

输出的结果分别为 0(为假)和 'len: 0'.有人知道为什么吗?

The results of the output are 0 (for false) and 'len: 0' respectively. Anyone know why?

亚当

createPasswordTextField 本质上是

createPasswordTextField is essentially

function createPasswordTextField(options, left){
    return Ti.UI.createTextField( options... )
}

推荐答案

我也遇到过这种情况.将数组添加到 TiProxy 对象(视图、窗口、按钮等)时，它无法按预期工作.您需要操作阵列关闭"代理，然后重新设置它.我不知道这是一个错误还是只是 TiProxy 对象属性的限制.下面是一个在 Titanium Mobile SDK 1.7.5 下在 iOS 上表现相同的示例:

I've come across this as well. When adding an array to a TiProxy object (View, Window, button etc.) it doesn't work as expected. You need to manipulate the array 'off' the proxy, then re-set it. I don't know if this is a bug or just a limitation of properties on TiProxy objects. Here is an example that behaves the same on iOS under Titanium Mobile SDK 1.7.5:

var proxy = Ti.UI.createView();  //this can be any TiProxy object

proxy.someArray = [];
proxy.someArray.push( '1' );
proxy.someArray.push( '2' );
Ti.API.info("Array modified directly on TiProxy object" );
Ti.API.info(proxy.someArray );

var myArray = [];
myArray.push( '1' );
myArray.push( '2' );
proxy.someArray = myArray;
Ti.API.info("Array modified outside TiProxy object" );
Ti.API.info( proxy.someArray );

proxy.someArray.push( '3' );
Ti.API.info("This will be unchanged" );
Ti.API.info(proxy.someArray );

var changeArray = proxy.someArray;
changeArray.push('3');
proxy.someArray = changeArray;
Ti.API.info("This is how you must do it." );
Ti.API.info(proxy.someArray );

返回:

[INFO] Array modified directly on TiProxy object
[INFO] []
[INFO] Array modified outside TiProxy object
[INFO] [ 1,  2 ]
[INFO] This will be unchanged
[INFO] [ 1,  2 ]
[INFO] This is how you must do it.
[INFO] [ 1, 2, 3 ]

找出 Android 上的行为要困难得多，因为 Ti.API.info(proxy.someArray); 只返回一个对象引用.

Finding out the behavour on Android is a lot harder bacause Ti.API.info(proxy.someArray ); just returns an object reference.

这篇关于使用 Titanium Appcelerator mobile 1.7.2 添加元素后的空数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！