Question

我在iPhone设备上使用NSFileManager创建目录和文件时遇到问题。我的代码，如下所示，在模拟器上工作正常，但在设备上没有，你能帮我吗？给我一些问题的方向，感谢每一个回复..

我首先以这种方式创建目录：

NSFileManager *fileMgr = [NSFileManager defaultManager];
NSArray *arPaths = NSSearchPathForDirectoriesInDomains(NSDownloadsDirectory, NSUserDomainMask, YES);
NSString *appPath = [[NSString alloc] init];
appPath = [arPaths objectAtIndex:0];

strDownloadsDir = [[NSString alloc] init];
strDownloadsDir = [[appPath stringByAppendingPathComponent:@"/Other"] copy];
if(![fileMgr fileExistsAtPath:strDownloadsDir])
    [fileMgr createDirectoryAtPath:strDownloadsDir attributes:nil];

然后我试图以这种方式在这个目录中创建新文件：

NSString *filePath = [strDownloadsDir stringByAppendingPathComponent:strDlFileName];
//Test whether this file exists, if not, create it
NSLog(@"%@", filePath);
if(![fileMgr fileExistsAtPath:filePath])
{
    if([fileMgr createFileAtPath:filePath contents:nil attributes:nil])
        NSLog(@"Creating new file at path %@", filePath);
    else
        NSLog(@"Failed to create new file.");
}

整个NSFileManager似乎有问题，因为当我使用带有此路径的文件的fileExistAtPath时

NSArray *arPaths = NSSearchPathForDirectoriesInDomains(NSDownloadsDirectory, NSUserDomainMask, YES);
NSString *appPath = [[NSString alloc] init];
appPath = [arPaths objectAtIndex:0];

它也不起作用，我试图将目录更改为NSDocumentsDirectory但它没有帮助

Answer 1

可能是因为使用方法“createDirectoryAtPath：attrubutes：”被苹果公司拒绝了.....

Answer 2

您只能在应用程序的沙箱目录下创建文件。 Apple不允许您创建文件。

这是你手机失败的原因吗？

Answer 3

[[NSFileManager defaultManager] createDirectoryAtPath:strPath withIntermediateDirectories:YES attributes:nil error:nil];

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *strFile = [documentsDirectory stringByAppendingPathComponent:@"hello/config.plist"];
        NSLog(@"strFile: %@", strFile);

        NSString *strPath = [documentsDirectory stringByAppendingPathComponent:@"hello"];
        if (![[NSFileManager defaultManager] fileExistsAtPath:strPath]) {
            NSLog(@"there is no Directory: %@",strPath);
            [[NSFileManager defaultManager] createDirectoryAtPath:strPath withIntermediateDirectories:YES attributes:nil error:nil];
        }

        NSArray *keys = [NSArray arrayWithObjects: @"username", @"password", @"serverName", @"serverPort", @"autoSave", nil];
        NSArray *values = [NSArray arrayWithObjects: @"11", @"11", @"11", @"11", @"11", nil];

        NSDictionary *configInfo = [[NSDictionary alloc] initWithObjects: values forKeys:keys];
        if (![configInfo writeToFile: strFile atomically: YES]) {
            NSLog(@"write file error");
        }

NSFileManager在模拟器上运行良好，但在设备上运行不正常

3 个答案: