在我的模型上设置NSString属性后,它立即返回为Null。奇怪的是,设置任何typedef属性都会被保留(即NSInteger)。代码如下。我也通过GCD运行这种方法 - 但我对此进行了评论。它没有改变任何东西。我在模型中也有一些NSCoding方法,但是注释掉委托并没有改变任何东西。
字面上一切正常,包括访问JSON dict和NSLogging结果,EXCEPT用于设置非typedef的模型属性。
更新
将任何NSString分配给[dictionary valueForKey:@“first_name”]会返回Null,所以这是访问字典的问题。
更新2
记录字典后,我注意到某些keyss没有“”而某些值没有“”。我正在使用rails中的as_json,并且在postman chrome扩展中,这个DOESNT发生了
{
available = 1;
boxing = 0;
certificates = "";
city = A;
"created_at" = "2014-12-14T07:23:35.445Z";
description = "Short description";
"drivers_license" = CA12345;
"drivers_license_expiration" = "12/20";
"drivers_license_state" = CA;
email = "test4@aol.com";
"facebook_id" = "";
"first_name" = TEsty;
gender = "";
id = 1;
"last_name" = Again;
latitude = "<null>";
longitude = "<null>";
password = g;
pilates = 0;
"reset_password_token" = "<null>";
running = 0;
strength = 0;
"updated_at" = "2014-12-25T08:42:27.122Z";
yoga = 0;
}
.h文件
@interface FSTrainer : NSObject <NSCoding>
@property (nonatomic) NSInteger id;
@property (nonatomic, strong) NSString* first_name;
@property (nonatomic, strong) NSString* last_name;
- (id) init;
- (id) initWith:(NSMutableDictionary *)dictionary;
等。
.m文件
-(id)init{
self = [super init];
if (!self) return nil;
return self;
}
- (id) initWith:(NSMutableDictionary *)dictionary
{
self = [super init];
if (!self) return nil;
if ([dictionary valueForKey:@"id"] != [NSNull class])
{self.id = [[dictionary valueForKey:@"id"] integerValue];}
if ([dictionary valueForKey:@"first_name"] != [NSNull class])
{
[self setFirst_name:[dictionary valueForKey:@"first_name"]];
NSLog(@"%@", [dictionary objectForKey:@"first_name"]);
NSLog(@"%@", [dictionary valueForKey:@"first_name"]);}
//Both NSLogs print out the correct names
if ([dictionary valueForKey:@"last_name"] != [NSNull class])
{self.last_name = [valueForKey objectForKey:@"last_name"];}
etc....
return self;
}
这是通过以下方式调用的:
dispatch_async(dispatch_get_global_queue(0, 0), ^{
[self computationForRails];
});
功能
-(void)computationForRails{
...
FSTrainer* currentTrainer = [[FSTrainer alloc] initWith:[tempdict valueForKey:@"data"]];
//sol-added JNKeychian
[JNKeychain saveValue:currentTrainer forKey:@"current_trainer"];
}
tempdict等于(数据是字典中的键)
id jsonObject = [NSJSONSerialization JSONObjectWithData: data
options: NSJSONReadingMutableContainers
error: &error];
我稍后访问该模型的位置(我保存的模型未正确设置其属性,因此这是应用程序崩溃的地方
FSTrainer* current_trainer = [JNKeychain loadValueForKey:@"current_trainer"];
NSString* trainerName = current_trainer.first_name;
答案 0 :(得分:1)
替换您的代码
[self setFirst_name:[dictionary valueForKey:@"first_name"]];
使用此代码
[self setFirst_name:[NSString stringWithFormat:@"%@",[dictionary valueForKey:@"first_name"]]];
它为我工作