转化为NSDictionary
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers | NSJSONReadingMutableLeaves error:nil];
字典转化为Model类
-(id) initWithDictionary:(NSDictionary *)dictionary {
if (self = [super init]){
[self setValuesForKeysWithDictionary:dictionary];
}
return self;
}