如何在多个视图/XIB 之间共享变量 [英] How to share a variable between multiple Views/XIBs

问题描述

我已经阅读了几个类似的主题，但似乎无法解决这个问题 - 抱歉.我有一个包含多个视图的项目，包括一个 ViewController、几个子"视图和一个 NavigationController.我想要一个可从任何视图访问的数组，以便我可以填充 TableView 或 TextField 等.我希望该数组可以从任何可以访问它的视图中修改.

I've read several similar threads, but can't seem to figure this out - sorry. I've got a project with multiple Views, including a ViewController, several "sub" views, and a NavigationController. I'd like to have an array that is accessible from any of the Views, so that I can populate a TableView or a TextField, etc. I'd like the array to be modifiable from any View that can access it.

现在我在 xxAppDelegate.h 文件中有这个:

Right now I have this in the xxAppDelegate.h file:

NSMutableArray *listOfHeadings;
@property (strong,nonatomic) NSMutableArray *listOfHeadings;

并在 xxAppDelegate.m 文件中填充数组:

And in the xxAppDelegate.m file I populate the array:

listOfHeadings = [[NSMutableArray alloc] init];
[listOfHeadings addObject:@"Heading 0"];
[listOfHeadings addObject:@"Heading 1"];

但我似乎无法从其他 .m 文件访问数组.我该如何正确执行此操作?

But I can't seem to access the array from other .m files. How do I do this correctly?

推荐答案

使用当前的设计，您可以使用以下方法获取 AppDelegate 指针:

With the current design you have, you can get ahold of the AppDelegate pointer using:

AppDelegate *dPtr = (AppDelegate *)[[UIApplication sharedApplication] delegate];

然后您可以使用该属性访问您的数组:

Then you can access your array using the property:

[dPtr.your_array objectAtIndex:i];

但我强烈建议使用单例设计模式来管理您的全局对象.

But I would highly recommend using a Singleton design pattern to manage your global objects.

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