JSON 是比较常用的数据格式,相比 XML 层次更清晰,这里介绍两种解析 JSON 的方式:NSJSONSerialization 和 JSONKit
NSJSONSerialization 是 iOS 5 以后推出的,比较好用的 JSON 解析包.
JSON 数据格式由对应的 '[',']' 和 '{','}',前者表示数组,后者表示字典.
NSJSONSerialization 解析过程:
1.获取文件路径
2.获取文件内容
3.解析
简单小例子:
1 - (IBAction)parserJSON:(id)sender {
2
3 //获取文件路径
4
5 NSString *jsonPath = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"];
6 NSError *error = nil;
7 NSData *jsonData = [NSData dataWithContentsOfFile:jsonPath];
8 NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
9 if (error == nil) {
10 NSLog(@"%@",array);
11 }else {
12 NSLog(@"%@",error);
13 }
14
15 //数据封装
16
17 NSMutableArray *arr = [NSMutableArray array];
18
19 for (NSDictionary *dic in array) {
20 Student *stu = [[Student alloc]initWithDictionary:dic];
21 [arr addObject:stu];
22 }
23
24 for (Student *stu in arr) {
25 NSLog(@"%@",stu);
26 }
27 }
JSONKit 解析:(代码)
1 - (IBAction)parserJSONWithJESONKIT:(id)sender {
2
3 //获取文件路径
4
5 NSString *jsonPath = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"];
6 NSError *error = nil;
7 NSString *JSONStr = [[NSString alloc]initWithContentsOfFile:jsonPath encoding:NSUTF8StringEncoding error:&error];
8 NSLog(@"%@",JSONStr);
9 //让jesonKIT 解析 JSON 数据
10 NSMutableArray *array = [JSONStr objectFromJSONString];
11 NSLog(@"%ld",array.count);
12 //数据封装
13 NSMutableArray *arr = [NSMutableArray array];
14
15 for (NSDictionary *dic in array) {
16 Student *stu = [[Student alloc]initWithDictionary:dic];
17 [arr addObject:stu];
18 }
19
20 for (Student *stu in arr) {
21 NSLog(@"%@",stu);
22 }
23 }