保存到 NSUserDefaults 会导致应用程序崩溃吗？

Question

我正在尝试使用下面的代码将会话保存到 NSUserDefaults，但出于某种原因这样做会导致我的应用程序崩溃并出现以下错误。

2015-10-31 12:38:22.327 App[13930:4844726] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Attempt to insert non-property list object {type = immutable dict, count = 17, entries => 0 : status = 1 1 : theme = {contents = ""} 2 : roles = {type = immutable dict, count = 2, entries => 0 : 2 = {contents = "authenticated user"} 1 : 3 = {contents = "administrator"} }

3 : uid = 1 5 : access = {contents = "1446319867"} 6 : login = {value = +1446320300, type = kCFNumberSInt64Type} 7 : picture = 9 : {contents = "signature_format"} = 10 : init = {contents = "brittany@email.ca"} 13 : signature = {contents = ""} 14 : data = {value = false} 15 : language = {contents = ""} 16 : created = {contents = "1428187324"} 17 : {contents = "rdf_mapping"} = {type = immutable dict, count = 3, entries => 0 : rdftype = {type = immutable, count = 1, values = ( 0 : {contents = "sioc:UserAccount"} )} 1 : name = {type = immutable dict, count = 1, entries => 2 : predicates = {type = immutable, count = 1, values = ( 0 : {contents = "foaf:name"} )} }

2 : homepage = {type = immutable dict, count = 2, entries => 0 : type = rel 2 : predicates = {type = immutable, count = 1, values = ( 0 : {contents = "foaf:page"} )} }

}

18 : timezone = {contents = "America/Los_Angeles"} 21 : name = admin 22 : mail = {contents = "email@email.ca"} } for key diosSession' *** First throw call stack: (0x183db8f5c 0x1989aff80 0x183db8ea4 0x183df5970 0x183d427c0 0x183d416d8 0x183df5c74 0x183df520c 0x183df8a1c 0x184c21138 0x1000ef5c8 0x1000f14fc 0x100120850 0x1000e8248 0x10026dd70 0x10026dd30 0x100273780 0x183d70258 0x183d6e0c0 0x183c9cdc0 0x18edf0088 0x189376f44 0x100159674 0x1991da8b8) libc++abi.dylib: terminating with uncaught exception of type NSException

知道为什么吗？

谢谢！

[DIOSUser userLoginWithUsername:_userField.text
                  andPassword:_passField.text
                   success:^(AFHTTPRequestOperation *op, id response) {
          // Saving to keychain/NSUserDefaults


          [[NSUserDefaults standardUserDefaults] setObject:[[DIOSSession sharedSession] user]
                                                                                  forKey:@"diosSession"];
                                        [[NSUserDefaults standardUserDefaults] synchronize];
                                        [[DIOSSession sharedSession] getCSRFTokenWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
                                            NSString *csrfToken = [NSString stringWithUTF8String:[responseObject bytes]];
                                            [[NSUserDefaults standardUserDefaults] setObject:csrfToken forKey:@"diosToken"];
                                            [[NSUserDefaults standardUserDefaults] synchronize];
                                        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                            // failure handler
                                        }];

                                        wrongLogin.hidden = YES;
                                        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
                                        MyAccountViewController *yourViewController = (MyAccountViewController *)[storyboard instantiateViewControllerWithIdentifier:@"MyAccount"];
                                        [self.navigationController pushViewController:yourViewController animated:YES];

                                        [self.activityIndicatorViewOne stopAnimating];
                                        self.activityIndicatorViewOne.hidden = YES;

                                        NSLog(@"Success!");}

                                    failure:^(AFHTTPRequestOperation *op, NSError *err) { NSLog(@"Fail!"); wrongLogin.hidden = NO; }
             ];

        }

Answer 1

"Any idea why?"。是：

[[NSUserDefaults standardUserDefaults] setObject:[[DIOSSession sharedSession] user]
                                          forKey:@"diosSession"];

我不知道[[DIOSSession sharedSession] user]是什么，只知道NSArray、NSDictionary、NSString、NSData、NSNumber NSDate 可能会被存储。

所以我想这就是原因。

Answer 2

请试试这个

用于设置对象：

NSData *yourData = [NSKeyedArchiver archivedDataWithRootObject:[[DIOSSession sharedSession] user]];
[[NSUserDefaults standardUserDefaults] setObject:yourData forKey:@"yourKey"];
[[NSUserDefaults standardUserDefaults] synchronize];

获取对象：

NSData *data = [[NSUserDefaults standardUserDefaults] objectForKey:@"yourKey"];
    DIOSSession *object = [NSKeyedUnarchiver unarchiveObjectWithData:data];

保存到 NSUserDefaults 会导致应用程序崩溃吗？

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