以编程方式清除iPhone上的辅助缓存 [英] programmatically clearing secondary cache on iPhone

问题描述

我创建了一个应用程序，我将在其中从服务器下载图像并将其本地存储在iPhone的文件系统中.它发生的很好.现在的问题是，当我退出应用程序时，我想清除iPhone上的本地缓存图像.

I have created an application , where i ll be downloading the images from server and storing it locally on the iPhone's file system. Its happening fine. Now the problem is , i want to clear the locally cached images on iPhone when ever i quit my application.

如何在iPhone上删除那些缓存的图像.它在iPhone上使用辅助存储器，我如何以编程方式访问它?

How do i delete those cached images on iPhone. it's using Secondary memory on iPhone, how do i access it programmatically ?

先谢谢您. 苏斯.

推荐答案

在applicationWillTerminate方法中清理它们.

Clean them up in your applicationWillTerminate method.

- (void)applicationWillTerminate:(UIApplication *)application
{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *imagesFiles = [fileManager contentsOfDirectoryAtPath:saveDirectory error:error];
    for (NSString *file in imagesFiles) {
        error = nil;
        [fileManager removeItemAtPath:[saveDirectory stringByAppendingPathComponent:file] error:error];
        /* do error handling here */
    }
}

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