0

我是 iPhone 新手,

我制作了应用程序,当用户下载任何内容时,它会被下载到DocumentDirectory

我想在我创建的文件夹中下载DocumentDirectory

如何做到这一点?

我想我会把文件下载到我的DocumentDirectory,然后我会将该文件移动到我的文件夹中DocumentDirectory

这是好习惯吗?

这是我的代码片段,但我仍然无法移动我的文件。

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {

    NSString *file = [NSString stringWithString:[url absoluteString]];
    NSURL *fileURL = [NSURL URLWithString:file];

    NSURLRequest *req = [NSURLRequest requestWithURL:fileURL];
    [NSURLConnection connectionWithRequest:req delegate:self];


    NSString *DestPath=[[[SourcePath stringByAppendingString:@"/"]stringByAppendingString:BookCateg]stringByAppendingString:@"/"];

                   if ([fm copyItemAtPath:SourcePath toPath:DestPath error:&error]) 
                   {
                      NSLog(@"Success !");
                   }
                  else{
                      NSLog(@"Fail to Move!");
                   }

}

我的日志显示Fail to Move!

任何帮助将不胜感激。

4

4 回答 4

8

您应该直接将文件下载到文档目录的文件夹中,为此您需要按照@iPhone Developer 的建议创建目录并在该目录中写入文件

例如:

  NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"/File"];
  error = nil;
  if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath])
    [[NSFileManager defaultManager] createDirectoryAtPath:stringPath withIntermediateDirectories:NO attributes:nil error:&error];

  NSURL *url = [NSURL URLWithString:@"http://www.ndqatar.mobi/18December/admin/rington/133/QatarDay13.mp3"];
  NSData *data = [NSData dataWithContentsOfURL:url];
  if(data)
  {
    stringPath = [stringPath stringByAppendingPathComponent:[url lastPathComponent]];
    [data writeToFile:stringPath atomically:YES];
  }

如果你想要你可以像这样移动文件:

 NSString *destPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"/Dest"];
  error = nil;
  if (![[NSFileManager defaultManager] fileExistsAtPath:destPath])
    [[NSFileManager defaultManager] createDirectoryAtPath:destPath withIntermediateDirectories:NO attributes:nil error:&error];
  destPath = [destPath stringByAppendingPathComponent:[stringPath lastPathComponent];];

 [[NSFileManager defaultManager] copyItemAtPath:stringPath toPath:destPath error:&error];
于 2012-07-25T06:58:06.947 回答
3

您可以使用以下代码:

NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"/Your Folder Name"];

    error = nil;
    if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath])
        [[NSFileManager defaultManager] createDirectoryAtPath:stringPath withIntermediateDirectories:NO attributes:nil error:&error];
NSString *DestPath=[stringPath stringByAppendingString:@"/Your file Name"];
于 2012-07-25T06:43:01.823 回答
1

您通过附加字符串而不是通过附加路径组件来使用字符串,这将附加路径并且您的文件将移到那里

享受编码

于 2012-07-25T06:56:10.060 回答
0
Framework: ReactJS
Library: Material-UI
Version: 4.0

我尝试使用https://material-ui.com/api/button/ (在按钮的 href 中添加链接),它适用于 ipad/iphone/ios safari。

import Button from '@material-ui/core/Button';
<Button href={add_your_link_here} />
于 2019-08-14T15:44:23.440 回答