1.归档方式

把记录保存在应用沙盒的某一文件中，进行归档，或者说存档。
新建一个类CJSearchRecord，继承NSObject,并遵守NSCoding协议
CJSearchRecord.h文件

@interface CJSearchRecord : NSObject<NSCoding>
@property (nonatomic, copy) NSString *beginCity;
@property (nonatomic, copy) NSString *endCity;

CJSearchRecord.m文件实现两个方法

//归档、存入档案
-(void)encodeWithCoder:(nonnull NSCoder *)encoder{
    
    [encoder encodeObject:_beginCity forKey:@"beginCity"];
    [encoder encodeObject:_endCity forKey:@"endCity"];
    
}
//解档，打开档案
-(nullable instancetype)initWithCoder:(nonnull NSCoder *)decoder{
    if (self=[super init]) {
        _beginCity = [decoder decodeObjectForKey:@"beginCity"];
        _endCity =[decoder decodeObjectForKey:@"endCity"];
    }
    return self;
}

在ViewController.m文件中导入上面创建的文件
在某一个按钮事件方法中

    //归档，保存搜索记录
    CJSearchRecord *record = [[CJSearchRecord alloc]init];
    //设置值
    record.beginCity = self.beginCity.titleLabel.text;
    record.endCity = self.endCity.titleLabel.text;
    //获取沙盒中的document目录
    NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    //拼接文件路径
    NSString *filePath = [path stringByAppendingPathComponent:@"searchRecoder.plist"];
    //进行归档
    [NSKeyedArchiver archiveRootObject:record toFile:filePath];

在viewDidLoad方法中

 //解档,读档，读取记录
    //获取文件路径
    NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *filePath = [path stringByAppendingPathComponent:@"searchRecoder.plist"];
    CJSearchRecord *record = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];