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 }
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