如何在iPhone应用程序中枚举和加载资源？ [英] How do I enumerate and load resources in an iPhone app?

问题描述

我试图在资源中填充一个图像集合的NSArray。但是，为了最大的灵活性，我试图避免硬编码文件名，甚至有多少文件。

I'm trying to populate an NSArray with a collection of images in Resources. However, for maximum flexibility, I'm trying to avoid hard-coding the filenames or even how many files there are.

通常，我会做这样的例子从苹果的示例代码：

Normally, I'd do something like this example from the sample code at apple:

kNumImages = 5;  //or whatever
NSMutableArray *images;
for (i = 1; i <= kNumImages; i++)
{
    NSString *imageName = [NSString stringWithFormat:@"image%d.jpg", i];
    [images addObject:[UIImage imageNamed:imageName];
}

但是，我试图完全避免kNumImages。

However, I'm trying to avoid kNumImages entirely. Is there a way to run a regex or something on resources?

推荐答案

这里是一个片段，只是从我的iPhone应用程序

Here's a snippet that does just that from my iPhone app

// Load item icons  
paths = [[NSBundle mainBundle] pathsForResourcesOfType:@"png" inDirectory:nil];
for (NSString *filename in paths) {
  filename = [[filename componentsSeparatedByString:@"/"] lastObject];
  if ([filename hasPrefix:@"ItemIcon"]) {
    [UIImage imageNamed:filename];
  }
}

它遍历所有具有png扩展名的资源，文件名以ItemIcon开头，然后加载到UIImage的内置缓存中。

It loops through all resources that have a png extension, and it the filename begins with "ItemIcon" then it loads into UIImage's built in cache.

如果您在特定目录中有它们，则需要指定间接：

If you have them in a specific directory, you will need to specify the indirectory: argument.

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