在我的应用中,我需要将自定义User
对象NSDictionary
保存在我的NSUserDefaults
中。我尝试使用以下代码:
NSDictionary *userObjectDictionary = response[@"user"];
NSLog(@"USER OBJECT:\n%@", userObjectDictionary);
[defaults setObject:userObjectDictionary forKey:@"defaultUserObjectDictionary"];
[defaults synchronize];
此尝试使用以下消息导致我的应用崩溃:
由于未捕获的异常而终止应用 'NSInvalidArgumentException',原因:'尝试插入非属性 列表对象{type = immutable dict,count = 10,entries => 0:status_id = 1:{contents =“first_name”} = exampleFirstName 3:id = {value = + 2,type = kCFNumberSInt64Type} 4:{contents =“profile_picture”} = {contents = “http://myDevServer.com/pictures/userName.jpg”} 5: last_name = exampleLastName 7:email = {contents =“myEmail@gmail.com”} 8:{contents =“badge_count”} = {value = + 0,type = kCFNumberSInt64Type} 9:user_name = userName 10:{contents =“phone_number”} = {contents =“0123456789”} 12:{contents =“status_updated_at”} = 为了钥匙 defaultUserObjectDictionary'
这是我的User
对象字典在我尝试保存之前的样子:
{
"badge_count" = 0;
email = "myEmail@gmail.com";
"first_name" = exampleFirstName;
id = 2;
"last_name" = exampleLastName;
"phone_number" = 0123456789;
"profile_picture" = "http://myDevServer.com/pictures/userName.jpg";
"status_id" = "<null>";
"status_updated_at" = "<null>";
"user_name" = userName;
}
是否崩溃,因为我的User
对象NSDictionary
中有空值?我尝试使用带有空值的虚拟数据的常规NSDictionary
并且它有效。如果这是问题,我该如何绕过这个?有时我的User
对象将具有可为空的属性。
答案 0 :(得分:4)
字典中的某些对象或键具有类,不支持属性列表序列化。有关详细信息,请参阅此答案:Property list supported ObjC types
我建议检查对象的关键字“profile_picture” - 它可能是NSURL。
如果这没有帮助,您可以使用以下代码来识别不兼容的对象:
for (id key in userObjectDictionary) {
NSLog(@"key: %@, keyClass: %@, value: %@, valueClass: %@",
key, NSStringFromClass([key class]),
userObjectDictionary[key], NSStringFromClass([userObjectDictionary[key] class]));
}
答案 1 :(得分:2)
NSNull在JSON中可接受(作为MATCH p=(n:Label{updatetime:'2017/5/1 6:30'})-[r:GO_TO{routeid:'1'}]->()
MATCH p1=(n1:Label{updatetime:'2017/5/1 6:30'})-[r1:GO_TO{routeid:'2'}]->()
MATCH p2=(n2:Label{updatetime:'2017/5/1 6:30'})-[r2:GO_TO{routeid:'3'}]->()
MATCH p3=(n3:Label{updatetime:'2017/5/1 6:35'})-[r3:GO_TO{routeid:'4'}]->()
MATCH p4=(n4:Label{updatetime:'2017/5/1 6:45'})-[r4:GO_TO{routeid:'5'}]->()
MATCH p5=(n5:Label{updatetime:'2017/5/1 6:45'})-[r5:GO_TO{routeid:'6'}]->()
MATCH p6=(n6:Label{updatetime:'2017/5/1 6:50'})-[r6:GO_TO{routeid:'7'}]->()
),但未列在属性列表中。因此,一种解决方案是将字典转换为NSData并保存。