我正在尝试将自定义对象保存到 NSUserDefaults 但它不起作用。这是代码。
/// 用户.m ////////////
#import "User.h"
@implementation User
....
+ (User *)getUser {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *myEncodedObject = [defaults objectForKey:kUser];
User *obj = (User *)[NSKeyedUnarchiver unarchiveObjectWithData: myEncodedObject];
return obj;
}
- (void)encodeWithCoder:(NSCoder *)encoder {
//Encode properties, other class variables, etc
[encoder encodeObject:self.address1 forKey:@"address1"];
[encoder encodeObject:self.address2 forKey:@"address2"];
[encoder encodeObject:self.city forKey:@"city"];
[encoder encodeObject:self.country forKey:@"country"];
[encoder encodeObject:self.created_at forKey:@"created_at"];
[encoder encodeObject:self.emergency_contact_name forKey:@"emergency_contact_name"];
[encoder encodeObject:self.emergency_contact_phone_number forKey:@"emergency_contact_phone_number"];
[encoder encodeObject:self.facetime_email forKey:@"facetime_email"];
[encoder encodeObject:self.gender forKey:@"gender"];
[encoder encodeObject:self.password forKey:@"password"];
[encoder encodeObject:self.phone_number forKey:@"phone_number"];
[encoder encodeObject:self.photo_url forKey:@"photo_url"];
[encoder encodeObject:self.role forKey:@"role"];
[encoder encodeObject:self.security_answer forKey:@"security_answer"];
[encoder encodeObject:self.security_question forKey:@"security_question"];
[encoder encodeObject:self.state forKey:@"state"];
[encoder encodeObject:self.updated_at forKey:@"updated_at"];
[encoder encodeObject:self.userID forKey:@"userID"];
[encoder encodeObject:self.username forKey:@"username"];
[encoder encodeObject:self.zip forKey:@"zip"];
[encoder encodeObject:self.email forKey:@"email"];
}
- (id)initWithCoder:(NSCoder *)decoder {
if((self = [super init])) {
//decode properties, other class vars
self.address1 = [decoder decodeObjectForKey:@"address1"];
self.address2 = [decoder decodeObjectForKey:@"address2"];
self.city = [decoder decodeObjectForKey:@"city"];
self.country = [decoder decodeObjectForKey:@"country"];
self.created_at = [decoder decodeObjectForKey:@"created_at"];
self.emergency_contact_name = [decoder decodeObjectForKey:@"emergency_contact_name"];
self.emergency_contact_phone_number = [decoder decodeObjectForKey:@"emergency_contact_phone_number"];
self.facetime_email = [decoder decodeObjectForKey:@"facetime_email"];
self.gender = [decoder decodeObjectForKey:@"gender"];
self.password = [decoder decodeObjectForKey:@"password"];
self.phone_number = [decoder decodeObjectForKey:@"phone_number"];
self.photo_url = [decoder decodeObjectForKey:@"photo_url"];
self.role = [decoder decodeObjectForKey:@"role"];
self.security_answer = [decoder decodeObjectForKey:@"security_answer"];
self.security_question = [decoder decodeObjectForKey:@"security_question"];
self.state = [decoder decodeObjectForKey:@"state"];
self.updated_at = [decoder decodeObjectForKey:@"updated_at"];
self.userID = [decoder decodeObjectForKey:@"userID"];
self.username = [decoder decodeObjectForKey:@"username"];
self.zip = [decoder decodeObjectForKey:@"zip"];
self.email = [decoder decodeObjectForKey:@"email"];
}
return self;
}
+ (void)saveUser:(User *)obj {
NSData *myEncodedObject = [NSKeyedArchiver archivedDataWithRootObject:obj];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:myEncodedObject forKey:kUser];
[defaults synchronize];
}
+ (User *)loadUserWithKey:(NSString *)key {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *myEncodedObject = [defaults objectForKey:key];
User *obj = (User *)[NSKeyedUnarchiver unarchiveObjectWithData: myEncodedObject];
return obj;
}
+(void)deleteUser {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:nil forKey:kUser];
}
@end
/// 这是我保存用户的方法
User *currentUser = [User getUser];
currentUser.firstname = self.firstNameField.text;
currentUser.lastname = self.lastNameField.text;
currentUser.email = self.emailField.text;
currentUser.password = self.passwordField.text;
currentUser.phone_number = self.mobileField.text;
[User saveUser:currentUser];
/// 这是我获取它的方式，但它返回时没有我在保存期间设置的任何属性集？怎么回事？
// Fill the textfields and image with the data
User *currentUser = [User loadUserWithKey:kUser];
self.firstNameField.text = currentUser.firstname;
self.lastNameField.text = currentUser.lastname;
self.mobileField.text = currentUser.phone_number;
self.emailField.text = currentUser.email;
所有当前用户。东西是零；