Question

这是我的代码：

NSString * path = kCachePath(kCacheFileName);
NSMutableArray * arry = [[NSMutableArray alloc]init];
arry = [NSKeyedUnarchiver unarchiveObjectWithFile:path];

//    NSData * data  = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
//    NSError *error = nil;
//    arry = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: &error];

if (arry) {
    [arry addObject:playModel];
    NSData * data = [NSKeyedArchiver archivedDataWithRootObject:arry];
    [NSKeyedArchiver archiveRootObject:data toFile:path];
    return YES;
} else {
    NSMutableArray * ary = [NSMutableArray array];
    [ary addObject:playModel];
    NSData * data = [NSKeyedArchiver archivedDataWithRootObject:ary];
    [NSKeyedArchiver archiveRootObject:data toFile:path];
}

我已成功将数组归档到该文件，但是当我想要打开数据文件时，我得到了NSMutableData', But I want an NSMutableArray . and I have tried the NSJSONSerialization to conver the NSdata to NSMutableArray and I got a nil`。任何人都知道哪里出错了？

这是我的cachePath：

#define kCacheFileName @"fakeLiveHistory.data"
#define kCachePath(kCacheFileName) ([NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0] stringByAppendingPathComponent:kCacheFileName])

Answer 1

你是ARCHIVE数据 - 下次收到数据时显然不是一个数组;）

将数组存档为开始

    NSData * data = [NSKeyedArchiver archivedDataWithRootObject:arry];

    [NSKeyedArchiver archiveRootObject:data toFile:path];

- ＆GT;

    [NSKeyedArchiver archiveRootObject:arry toFile:path];

为什么我不从NSKeyedUnarchiver获取数组？

1 个答案: