我们如何使用KeychainItemWrapper类（ARC）保存NSArray

我想使用KeychainItemWrapper类保存NSArray

我已经知道我们可以在阅读这个问题后存储NSDictionary

但它不工作

这是我迄今为止所做的

 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]; 

但是在设定对象的最后一行是崩溃。

错误日志：

 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' 

需要帮忙。

Answer 1

我有想法。 你可以试试这个。 你必须#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"];