NSKeyedArchiver archiveRootObject保持返回NO

Question

我花了几个小时试图解决这个问题,但我已经没想完了.

我要做的就是归档一个对象,但该方法archiveRootObject一直在返回NO

这是我的代码:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cacheDirectory = [paths objectAtIndex:0];
cacheDirectory = [cacheDirectory stringByAppendingPathComponent:@"MyAppCache"];
NSString *fullPath = [cacheDirectory stringByAppendingPathComponent:@"archive.data"];

if(![[NSFileManager defaultManager] fileExistsAtPath:fullPath]){
    [[NSFileManager defaultManager] createDirectoryAtPath:fullPath withIntermediateDirectories:YES attributes:nil error:nil];
}

NSArray *array = [NSArray arrayWithObjects:@"hello", @"world", nil];
NSLog(@"Full Path: %@", fullPath);
BOOL res = [NSKeyedArchiver archiveRootObject:array toFile:fullPath];

if(res){
    NSLog(@"YES");
}else{
    NSLog(@"NO");
}

每次我运行它,它都会打印出来NO.

任何帮助,将不胜感激!

Answer 1

使用路径创建目录,fullPath然后尝试在同一路径上写入文件.用这样的文件覆盖目录是不可能的.使用您的cacheDirectory字符串来创建目录.