我正在使用以下代码下载 slqite 文件并存储它
self.responseData = NSMutableData
我收到responseData = 2048bytes
。运作良好。
然而,白写它确实会创建一个文件myFile.sqlite
,但它是零字节的。怎么了?
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *dbPath = [self getDBPath];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success)
{
if(self.responseData)
{
dbPath = [dbPath stringByAppendingPathComponent:[self.selectedBtn.dbPath lastPathComponent]];
[self.responseData writeToFile:dbPath atomically:YES];
[self performSegueWithIdentifier:@"list" sender:self];
}
}
[self.alertView removeFromSuperview];
}
-(NSString *) getDBPath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSURL *url = [[NSURL alloc] initWithString:[self.selectedBtn.dbPath lastPathComponent]];
return [documentsDir stringByAppendingPathComponent:[url lastPathComponent]];
}
我收到错误
`The operation couldn’t be completed. (Cocoa error 4.)`
dbPath : /Users/umar/Library/Application Support/iPhone Simulator/6.1/Applications/00027635-CE9C-48C3-8000-64CA1E6532F1/Documents/music.sqlite/music.sqlite