json解析1

手动解析

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//json:也是一种数据解析格式，键值对形式

- (void)viewDidLoad {

[super viewDidLoad];

//xlm :sax(标签对解析)   dom(属性解析)

//json:也是一种数据解析格式，键值对形式

//NSString * str = @"{\"key\":\"value\"}";

//字典{}:里面存的都是:键值对

//数组[]:里面存的是:值

//json解析类:NSJSONSerialization

//json解析之后是数组或者字典

NSURL* url = [NSURL URLWithString:@"http://localhost:8080/Login1/NewServlet?command=5"];

NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:url];

[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *_Nullableresponse,NSData *_Nullabledata,NSError *_NullableconnectionError) {

NSString * str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"data -----%@",str);

NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

//接收请求到的数据

//-号方法

///BaseClass * base = [[BaseClass alloc] initWithData:dic];

//+号方法更为简洁方便

BaseClass * base = [BaseClassb aseClassWithDic:dic];

NSLog(@"base.userArr.count ===== %ld",base.userArr.count);

}];

}

---

BaseClass.m

//自定义对象类初始化方法

- (id)initWithDic:(NSDictionary*)dic {

if(self= [super init]) {

_userArr= [[NSMutableArray alloc] init];

//类中接收数据中名为"Parma"的数组

NSArray * arr = [dic objectForKey:@"parma"];

NSLog(@"arr ----- %@",arr);

//遍历数组的字典

for(NSDictionary * userDic in arr) {

//对象接收从数组中取出的字典

User * user = [[User alloc] initWithDic:userDic];

//在接收对象的数组里添加解析后的对象

[_userArr addObject:user];

}

}

return self;

}

+ (id)baseClassWithDic:(NSDictionary*)dic {

return[[self alloc] initWithDic:dic];

}

---

User.m

//自定义对象初始化方法

- (id)initWithDic:(NSDictionary*)dic {

if(self= [super init]) {

//对象对接收来的字典进行解析并接收值

self.name= [dicobjectForKey:@"name"];

self.pwd= [dicobjectForKey:@"pwd"];

self.age= [dicobjectForKey:@"age"];

self.trueName= [dicobjectForKey:@"tureName"];

}

return self;

}