NSString*str=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; 

NSString*path=[str stringByAppendingPathComponent:@"account.plist"];

//1.

 [responseObject writeToFile:path atomically:YES];

//2.將一個物件寫入沙盒 需要用到一個NSKeyedArchiver 自定義物件的儲存必須用這個
 

//注:改物件要遵循NSCoding

 [NSKeyedArchiver archiveRootObject:model toFile:path];

//  在物件中重寫encodeWithCoder:(NSCoder*)aCoder 方法，目的是告訴編譯器把哪些屬性存入沙盒

-(void)encodeWithCoder:(NSCoder *)aCoder
{
    [encoder encodeInt:self.uid forKey:@"uid"];
    [encoder encodeObject:self.name forKey:@"name
 
"];
    [encoder encodeObject:self.tel forKey:@"tel"];

// 反歸檔 的時候會呼叫這個方法  解檔
-(instancetype)initWithCoder:(NSCoder *)decoder
{
    if (self=[super init]) {
        self.uid=[decoder decodeIntForKey:@"uid"];
        self.name=[decoder decodeObjectForKey:@"name"];
        self.tel=[decoder decodeObjectForKey:@"
 
tel"];
        self.birthday=[decoder decodeObjectForKey:@"birthday"];
        
    }
    return self;
}