为什么我不能从 NSKeyedUnarchiver 获取数组？

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];
}

我已经成功地将一个数组存档到文件中，但是当我想打开数据文件时，我得到了一个 NSMutableData', But I want anNSMutableArray. and I have tried theNSJSONSerializationto conver theNSdatatoNSMutableArrayand I got a无`。有人知道哪里出了问题吗？

这是我的缓存路径：

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

Answer 1

您归档数据 - 显然不是数组，所以下次您取回数据时 ;)

将数组存档作为开始

    NSData * data = [NSKeyedArchiver archivedDataWithRootObject:arry];

    [NSKeyedArchiver archiveRootObject:data toFile:path];

-->

    [NSKeyedArchiver archiveRootObject:arry toFile:path];

为什么我不能从 NSKeyedUnarchiver 获取数组？

Why don't I get an Array from a NSKeyedUnarchiver?

objective-c

nskeyedarchiver

ios