我正在尝试将 NsData 文件保存到目录中。这是我的方法的代码：
- (void)cacheImage:(NSData *)imageData withTitle:(NSString *)title
{
NSURL *cacheURL = (NSURL *)[[self.fileMenager URLsForDirectory:NSCachesDirectory inDomains:NSUserDomainMask] objectAtIndex:0]; //we take the URL of the cache Directory and comvert the url of the cache directory into a string
NSURL *imageFolder = [cacheURL URLByAppendingPathComponent:PHOTO_CACHE_FOLDER];
if ([self.fileMenager isWritableFileAtPath:[cacheURL path]]) { //check if the cache directory is writable
if (![self.fileMenager createDirectoryAtURL:cacheURL withIntermediateDirectories:NO attributes:nil error:nil]) { //check if the directory of our image is already exist
NSURL * fileToWrite = [[imageFolder URLByAppendingPathComponent:title isDirectory:NO] URLByAppendingPathExtension:@"jpg"]; //take the complete url of image
if ([imageData writeToURL:fileToWrite atomically:YES]) //atomically = safe write
{
NSArray *debug = [self.fileMenager contentsOfDirectoryAtPath:[imageFolder path] error:nil];
for (NSURL *url in debug)
NSLog(@"url prooooo : %@",url);
}
}
}
}
这是我尝试编写的 url (fileToWrite) 示例：
file://localhost/Users/MarcoMignano/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/93B0A0AC-EC13-4050-88CA-F46FBA11001E/Library/Caches/image_cache/Mozart%201.jpg
重点很简单，writeToURL 方法返回 NO，我不明白为什么，url 看起来是正确的。
有人可以帮助我'谢谢。