iOS存储自定义对象

使用MJExtension进行自定义对象解档归档达到存储自定义对象的功能

UserInfoModel.h
在模型的.h 加上

@interface UserInfoModel : NSObject <NSCoding>

UserInfoModel.m加上

//解档归档路径,名字随意
#define kNSKeyedArchPath [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]      stringByAppendingPathComponent:@"XXX.arch"]

@implementation UserInfoModel
//通过MJExtension实现解归档
MJCodingImplementation


//实现存和取两个函数

+ (void)saveUserInfoModel:(UserInfoModel *)model{
    [NSKeyedArchiver archiveRootObject:model toFile:kNSKeyedArchPath];
}


+ (UserInfoModel *)getUserInfoModel{
    return [NSKeyedUnarchiver unarchiveObjectWithFile:kNSKeyedArchPath];
}

@end

然后在需要的地方进行归档解档操作:

//存
 UserInfoModel *model = [UserInfoModel mj_objectWithKeyValues:myInfoDict];
                        [UserInfoModel saveUserInfoModel:model];

 //取
UserInfoModel *model = [UserInfoModel getUserInfoModel];
        NSLog(@"%@",model.name);

它其实就帮我们实现了把所有属性都归档和反归档的操作，那么问题来了，加入我不想所有的文件都归档，我只想归档name和age属性，不想归档gay属性，那怎么办呢？其实MJExtension已经帮我们想好了，只需要调用一下：

[UserInfoModel setupIgnoredCodingPropertyNames:^NSArray *{
    return @[@"gay"];
}];