将.zip文件转换为NSData [英] convert .zip file into NSData

问题描述

嘿，用zip文件初始化NSData是正确的吗？我想将一个zip文件转换为NSData并构造另一个文件与数据（在简单的语言复制它）。我有如下代码：

Hey, Is it correct to initialize an NSData with a zip file? I want to convert a zip file into NSData and construct another file with the data (in simple language 'copy it'). I have the code as:

NSURL *theFileUrl = [NSURL URLWithString: @"file://localhost/Users/xxx/Desktop/testZippedFile.zip"];

NSData *data = [NSData dataWithContentsOfURL: theFileUrl];

当我， NSLog（@Data：％@，data） ，我得到一些输出，但是当我尝试初始化NSString与这些数据，它不工作：

When I, NSLog(@"Data: %@", data) , i do get some output but when I try to initialize an NSString with this data, it doesn't work:

 NSString *str = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
`NSLog(@"String: %@", string)`

log as： String：PK

任何人都可以指出我的错误。
提前感谢！

Can anyone point out my mistakes please. Thanks in advance!

推荐答案

为什么会这样？ NSFileManager 将为你做的：）

Why do it that way? NSFileManager will do it for you :)

[[NSFileManager defaultManager] copyItemAtPath:oldPath toPath:newPath error:nil];

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但是，这只适用于本地 - 如果您要从服务器复制文件，请查看 NSURLConnection 加载数据，然后NSData的writeToFile：atomically：方法将内容保存到文件系统（在这里。）

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However, this only works for files that are local - if you want to copy a file from a server, you should have a look at NSURLConnection to load the data and then NSData's writeToFile:atomically: method to save the contents to the file system (found here.)

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