JSON格式的数据是最常用的数据格式，处理方法的选择就显得比较重要了。我常用的一种是用对象来接收，然后保存在数组中，需要时直接从数组中取值。下面列出一个小例子。
1、在.h文件中：
#import <Foundation/Foundation.h>
@interface DailyWeathers : NSObject
@property(nonatomic,strong) NSString *date;
@property(nonatomic,strong) NSString *maxtempF;
@property(nonatomic,strong) NSString *mintempF;
@property(nonatomic,strong) NSURL *weatherIconUrl;
+(id)weatherWithJSON:(NSDictionary*)json;
@end
2、在.m文件中：
#import "DailyWeathers.h"
@implementation DailyWeathers
+(id)weatherWithJSON:(NSDictionary *)json{
return [[self alloc] initWithJSON:json];
}
-(id)initWithJSON:(NSDictionary*)json{
self = [super init];
if (self) {
self.date = json[@"date"];
self.maxtempF = json[@"maxtempF"];
self.mintempF = json[@"mintempF"];
self.weatherIconUrl = [NSURL URLWithString:json[@"hourly"][3][@"weatherIconUrl"][0][@"value"]];
}
return self;
}
@end
3、在网络请求数据的地方，直接调用下面的方法：
-(NSArray*)dailyWeathersWithKeyFromJSON:(id)json{
NSMutableArray *result = [NSMutableArray new];
NSArray *weathers = json[@"data"][@"weather"];
for (NSDictionary *weather in weathers) {
DailyWeathers *dailyWeather = [DailyWeathers weatherWithJSON:weather];
[result addObject:dailyWeather];
}
return [result copy];
}