iphone - 下载 nsDocumentDirectory 中的 zip 文件，解压并阅读

Question

我在某个 URL 上有一个 .zip 文件，我想下载它、解压并将其保存到 nsdocument 目录中，而无需任何 UI 或用户交互。然后回读。

Answer 1

在 .h 文件中声明此变量

NSMutableData *responseData;

在 viewDidLoad 方法中写入此代码 此方法将开始从给定 URL 下载文件

NSURL *serverURL = [NSURL URLWithString:@"your file URL here"];
NSURLRequest *request = [NSURLRequest requestWithURL:serverURL];
NSURLConnection *cn = [NSURLConnection connectionWithRequest:request delegate:self];
[cn start];

在.m文件中实现此委托(delegate)方法

#pragma mark - NSURLConnection Delegate Methods
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    NSLog(@"%s",__FUNCTION__);
    responseData = nil;
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"%s",__FUNCTION__);
    responseData = [[NSMutableData alloc] initWithCapacity:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSLog(@"%s",__FUNCTION__);
    [responseData appendData:data];
}


- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSLog(@"%s",__FUNCTION__);

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *docDirPath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
    NSString *filePath = [docDirPath stringByAppendingPathComponent:@"DownloadedZip.zip"];

    // Save file to Document Directory
    [responseData writeToFile:filePath atomically:YES];
    responseData = nil;
}

下载项目以取消存档 zip 文件 here并将文件保存到文档目录后放置取消存档代码