Error Domain=NSCocoaErrorDomain Code=512 \"The operation couldn’t be completed.The operation couldn’t be completed. Is a directory

问题:

I want use writeToFile to store a pic image to the documents, but find the error below, how to solve it ?

Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" {NSFilePath=/Users/alexqdh/Library/Application Support/iPhone Simulator/6.0/Applications/xxx/Documents/girl.png, NSUnderlyingError=0x753e630 "The operation couldn’t be completed. Is a directory"}

-(NSString*)getImagePath:(NSString *)name {     NSArray *path =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask, YES);     NSString *docPath = [path objectAtIndex:0];     NSFileManager *fileManager = [NSFileManager defaultManager];     NSString *finalPath = [docPath stringByAppendingPathComponent:name];     [fileManager createDirectoryAtPath:finalPath withIntermediateDirectories:YES attributes:nil error:nil];     return finalPath; } //below is how to use NSData writeToFile AFImageRequestOperation *opera = [AFImageRequestOperation imageRequestOperationWithRequest:request imageProcessingBlock:nil     success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {     img.image = image;     [self.view addSubview:img];     NSData *imageData = UIImagePNGRepresentation(img.image);     if(imageData == nil)     {         NSLog(@"imageData nil");     }     NSString *picPath = [self getImagePath:@"girl.png"];     NSLog(@"path:%@",picPath);     NSError *error = [[NSError alloc]init];     BOOL a = [imageData writeToFile:picPath options:NSDataWritingAtomic error:&error];     if(a == YES)     {         NSLog(@"YES");     }     else     {         NSLog(@"NO.error:%@", error);     }      /*NSData *imageData = UIImagePNGRepresentation(img.image);     NSString *picPath = [self getImagePath:@"girl.png"];     [imageData writeToFile:picPath atomically:YES];*/      NSLog(@"Got it.code:%d",response.statusCode); } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {     NSLog(@"Failed pic.error:%@",error); }];  [opera start]; 

回答1:

The problem is caused by creating a directory with the name of the image, then trying to write a file in place of the directory. In other words, you are first creating a directory named:

Documents/girl.png/

then you try to write a file to the path:

Documents/girl.png

Obviously this is not what you meant to do. In your getImagePath: method, get rid of the call to create the directory. The Documents directory will already exist. And of course you don't want a directory corresponding to the filename.

One other option is to change your getImagePath: to:

- (NSString*)getImagePath:(NSString *)name {     NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask, YES);     NSString *docPath = [path objectAtIndex:0];     NSFileManager *fileManager = [NSFileManager defaultManager];     NSString *finalPath = [docPath stringByAppendingPathComponent:name];      // Remove the filename and create the remaining path     [fileManager createDirectoryAtPath:[finalPath stringByDeletingLastPathComponent] withIntermediateDirectories:YES attributes:nil error:nil];      return finalPath; } 

This updated code now supports you passing in name values that include subdirectories you might want.

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