- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

        UIImage *baseImage = [info objectForKey:UIImagePickerControllerOriginalImage];

        if (baseImage == nil) return;

        compositeImage = [self addOverlayToBaseImage:baseImage];

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

        NSDate* date = [NSDate date];

        NSDateFormatter* formatter = [[[NSDateFormatter alloc] init] autorelease];

        [formatter setDateFormat:@"yyyyMMddHHMMSS"];

        NSString* str = [formatter stringFromDate:date]; 

        //给照片按拍摄时间命名

        NSString *uniquePath=[[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",str]];

    BOOL result=[UIImagePNGRepresentation(compositeImage)writeToFile: uniquePath atomically:YES];

    if (result) {

        NSLog(@"success");

    }        

}

 

NSString *DocumentsDirectory = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"XXX.db"];    NSFileManager *fileManager = [[NSFileManager alloc] init];    if (![fileManager fileExistsAtPath:DocumentsDirectory]) {        NSString *newFile = [[NSBundle mainBundle] pathForResource:@"XXX.db" ofType:nil];        [fileManager copyItemAtPath:newFile toPath:DocumentsDirectory error:nil];    }    [fileManager release];