cocoa - 归档 NSString 字典

Question

我想存档只包含 NSString 的字典，但是当我取消存档时，发生错误:

[NSKeyedUnarchiver initForReadingWithData:]: non-keyed archive cannot be decoded by NSKeyedUnarchiver

我的代码是:

- (IBAction)startArchive:(id)sender {
    NSString *path = [self pathForDataFile];
    NSMutableDictionary *ageDictionary= [NSMutableDictionary dictionary];
    [ageDictionary setValue:@"12" forKey:@"Jack"];
    [ageDictionary setValue:@"22" forKey:@"John"];
    [NSArchiver archiveRootObject:ageDictionary toFile:path];
}


- (IBAction)unarchive:(id)sender {
    NSString *path = [self pathForDataFile];
    NSDictionary *rootObject = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
    NSLog(@"%@",rootObject);
}

Answer 1

原因是 Unarchiver。您使用 NSArchiver 进行归档。作为解档程序，您应该使用 NSUnarchiver。如果您使用 NSKeyedArchiver，则应该使用 NSKeyedUnarchiver。

你把他们搞糊涂了。

流动代码是测试工作:

    #import <Foundation/Foundation.h>

void startArchive() {
    NSString *path = @"/Users/dinosaur/Desktop/test.plist";
    NSMutableDictionary *ageDictionary= [NSMutableDictionary dictionary];
    [ageDictionary setValue:@"12" forKey:@"Jack"];
    [ageDictionary setValue:@"22" forKey:@"John"];
    [NSArchiver archiveRootObject:ageDictionary toFile:path];
}


void unarchive() {
    NSString *path = @"/Users/dinosaur/Desktop/test.plist";
    NSDictionary *rootObject = [NSUnarchiver unarchiveObjectWithFile:path];
    NSLog(@"%@",rootObject);
}


int main(int argc, char *argv[]) {
    @autoreleasepool {
        startArchive();
        unarchive();
    }
}

============

这是日志:

2012-08-27 14:03:11.511 无标题[7930:707] { jack =12； 约翰 = 22；}