不写入NSMutableArray

Question

我有一个应用程序，其中包含需要添加到NSMutableArray中的路径，以及writeToFile它。

int r = arc4random() % 100;
int s = arc4random() % 100;
int e = arc4random() % 100;
NSLog(@"%i%i%i.MOV", r, s, e);
NSString * tempFileName = [NSString stringWithFormat:@"%i%i%i.MOV", r, s, e];
NSString * tempFilePath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString * storePath = [documentsDirectory stringByAppendingPathComponent:tempFileName];
NSError *error = nil;
[[NSFileManager defaultManager] copyItemAtURL:[NSURL fileURLWithPath:tempFilePath]
                                        toURL:[NSURL fileURLWithPath:storePath]
                                        error:&error];

if (error) {
    NSLog(@"%@", error);
}
NSLog(@"Old File path : %@", tempFilePath);
NSLog(@"New File path : %@", storePath);
dayCounter ++;
    videoDayCounter = [[NSMutableArray alloc] initWithContentsOfFile:dayCounterPath];
    NSLog(@"DayCounter INIT");
[videoDayCounter addObject:dayCounter];
[videoDayCounter writeToFile:dayCounterPath atomically:YES];
NSLog(@"dayCounter wrote to file"); '
allVideos = [[NSMutableArray alloc] initWithContentsOfFile:allVideosPath];
NSLog(@"AllVideosINIT");
[allVideos addObject:storePath];
NSLog(@"array: %@", allVideos);
[allVideos writeToFile:allVideosPath atomically:YES];
[videoCount setText:[allVideos count]];
[daysLabel setText:[videoDayCounter count]];
[self dismissModalViewControllerAnimated:YES];
[picker release];

所有视频的NSLog都返回NULL。

我试图通过

在应用启动时创建allVideosPath

 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *allVideosPath = [documentsDirectory stringByAppendingPathComponent:@"allVideos.plist"];
 NSString *dayCounterPath = [documentsDirectory stringByAppendingPathComponent:@"dayCount.plist"];
 BOOL booleanAllVideos;
 BOOL booleanDayCounter;
 NSFileManager *fileManager = [NSFileManager defaultManager];

 booleanAllVideos = [fileManager fileExistsAtPath:allVideosPath];
 booleanDayCounter= [fileManager fileExistsAtPath:dayCounterPath];

 if(booleanAllVideos == NO)
 {
     NSMutableArray *allVideos = [[NSMutableArray alloc] initWithCapacity:3];
     [allVideos writeToFile:allVideosPath atomically:YES];
 }
 if(booleanDayCounter == NO)
 {
     NSMutableArray *videoDayCounter = [[NSMutableArray alloc] initWithCapacity:3];
     [allVideos writeToFile:dayCounterPath atomically:YES];
 }

但我猜它不起作用？

谢谢！

Answer 1

[[NSFileManager defaultManager] copyItemAtURL:[NSURL fileURLWithPath:tempFilePath]
                                    toURL:[NSURL fileURLWithPath:storePath]
                                    error:&error];

你确定文件“tempFilePath”存在吗？

Answer 2

在您的阅读功能中，allVideosPath是否正确定义？我没有看到任何代码在你的阅读功能中设置它。