难以理解的initForReadingWithData中的存档/取消存档结果 [英] Archiving / Unarchiving results in initForReadingWithData incomprehensible archive

问题描述

我已经在applicationWillTerminate上实现了保存，并在applicationWillFinishLoading上实现了加载. 有一个完整的对象树，都实现了NSCoding协议，我已经检查了输入的类型.

I've implemented an save on applicationWillTerminate and load on applicationWillFinishLoading. There is a complete object tree, all implement the NSCoding protocol and I've check the types I enter.

其中一个类还将NSMutableData存储到NSKeyedArchive，我怀疑这有时可能会破坏取消存档.奇怪的是，有时它起作用，有时却不起作用.我怀疑NSMutableData中的某些内容会破坏存档.

One of the classes also stores an NSMutableData to the NSKeyedArchive, which I suspect might break unarchiving occasionally. Weirdly enough, sometimes it works and sometimes it doesn't. I suspect some content in the NSMutableData will break the archiving.

我在所有对象上都使用encodeObject，但布尔型和整数型除外，在这里我使用正确的对应方法(encodeBool:forKey:和encodeInt:forKey:)

I use encodeObject on all objects, except for the bools and int where I use the correct corresponding method (encodeBool:forKey: and encodeInt:forKey:)

更清楚的是:该代码确实有效，有时它能够重建相当完整的对象图，而并非总是如此.

To be more clear: the code really does work, sometimes is it able to rebuild a rather complete object graph, just not all the time.

我收到的错误消息是:

initForReadingWithData incomprehensible archive 0x62, 0x70, 0x6c, 0x69, 0x73, 0x74, 0x30, 0x30

已添加:代码失败，它的NSMutableData为10+ MB

Added: code which is failing, it an NSMutableData of 10+ MB

- (void)encodeWithCoder:(NSCoder*)encoder {
[encoder encodeObject:self.encodedMessage forKey:@"EncodedMessage"]; //NSData
[encoder encodeObject:self.data forKey:@"Data"]; //NSMutableData (10+MB)
[encoder encodeObject:self.header forKey:@"Header"]; //NSString
[encoder encodeObject:self.fileName forKey:@"FileName"]; //NSString
[encoder encodeInt:self.dataStartIndex forKey:@"DataStartIndex"]; //int
[encoder encodeInt:self.dataEndIndex forKey:@"DataEndIndex"]; //int
}

- (id)initWithCoder:(NSCoder*)decoder {
    if (self = [super init]) {
        self.encodedMessage = [decoder decodeObjectForKey:@"EncodedMessage"]; //NSData
        self.data = [decoder decodeObjectForKey:@"Data"]; //NSMutableData
        self.header = [decoder decodeObjectForKey:@"Header"]; //NSString
        self.fileName = [decoder decodeObjectForKey:@"FileName"]; //NSString
        self.dataStartIndex = [decoder decodeIntForKey:@"DataStartIndex"]; //int
        self.dataEndIndex = [decoder decodeIntForKey:@"DataEndIndex"]; //int
    }

    return self;
}

当我删除self.data编码和解码时，它似乎总是可以工作. 如果使用较小的self.data，它也会失败.似乎不是大小，而是内容问题?

When I remove the self.data encoding and decoding it always seem to work. It also fails with smaller sized self.data. Doesn't seem size but content issue?

当我确实将nsmutabledata写入文件时，试图打开该文件，适当的列表编辑器显示错误:

Tried to open the file when I did write the nsmutabledata to it, the propertly list editor displays the error:

"Conversion of string failed. The string is empty."

plutil也给出此错误:

plutil also gives this error:

"$ plutil -lint nzbvortex.state nzbvortex.state: Conversion of string failed. The string is empty."

推荐答案

似乎通过NSMutableArray存储超过230000字节会导致NSKeyedArchiver创建损坏的plist文件.

It seems that store more than around 230000 bytes via an NSMutableArray will cause the NSKeyedArchiver to create a broken plist file.

220000件作品，250000件作品没有.是否搜索了允许的确切数量.

220000 works, 250000 didn't. Did search for the exact amount that is allowed.

这篇关于难以理解的initForReadingWithData中的存档/取消存档结果的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！