我们如何使用KeychainItemWrapper类（ARC）保存NSArray [英] How can we save NSArray using KeychainItemWrapper class(ARC)

问题描述

我想保存 NSArray 使用 KeychainItemWrapper class

I want to save NSArray using KeychainItemWrapper class

我已经知道在阅读这个问题后我们可以存储 NSDictionary

I have come to know that we can store the NSDictionary after reading This Question

但是它不起作用

这是我到目前为止所做的事情

NSArray *myArray = [[NSArray alloc]initWithObjects:@"Hello1",@"Hello2",@"Hello3",@"Hello4", nil];
NSDictionary *myDic  = [[NSDictionary alloc]initWithObjectsAndKeys:myArray, @"arrayKey", nil];

NSString *error;
NSData *dictionaryRep = [NSPropertyListSerialization dataFromPropertyList:myDic format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];

KeychainItemWrapper *keychain =
[[KeychainItemWrapper alloc] initWithIdentifier:@"MyIdentifier" accessGroup:nil];

[keychain setObject:dictionaryRep forKey:(__bridge id)kSecValueData];

但它在我们设置对象的最后一行崩溃。

But it is crashing at last line where we are setting object.

Erro Logs：

Erro Logs:

2013-10-01 12:16:47.590 stackoverflowtry[3883:a0b] -[__NSCFData dataUsingEncoding:]: unrecognized selector sent to instance 0xa1686a0
2013-10-01 12:16:47.593 stackoverflowtry[3883:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFData dataUsingEncoding:]: unrecognized selector sent to instance 0xa1686a0'

需要帮助。

推荐答案

我有想法。你可以试试这个。你必须 #importSBJsonWriter.h

i have idea. you can try this. you must #import "SBJsonWriter.h"

    NSArray *myArray = [[NSArray alloc]initWithObjects:@"Hello1",@"Hello2",@"Hello3",@"Hello4", nil];
NSDictionary *myDic  = [[NSDictionary alloc]initWithObjectsAndKeys:myArray, @"arrayKey", nil];


KeychainItemWrapper *keychain =
[[KeychainItemWrapper alloc] initWithIdentifier:@"MyIdentifier" accessGroup:nil];

    SBJsonWriter *jsonWriter = [[SBJsonWriter alloc] init];
    NSString *jsonString = @"";

        jsonString = [jsonWriter stringWithObject:myDic];

    [keychain setObject:jsonString forKey:(__bridge id)(kSecAttrDescription)];

如果你想得到它

NSString *JsonString= [keychain objectForKey:(__bridge id)(kSecAttrDescription)];
NSArray *myArray=  [[JsonString JSONValue] objectForKey:@"arrayKey"];

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