iOSJSON數(shù)據(jù)解析

2019-11-14 18:02:01

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JSON 是比較常用的數(shù)據(jù)格式,相比 xml 層次更清晰,這里介紹兩種解析 JSON 的方式:NSJSONSerialization 和 JSONKit

NSJSONSerialization 是 iOS 5 以后推出的,比較好用的 JSON 解析包.

JSON 數(shù)據(jù)格式由對(duì)應(yīng)的 '[',']' 和 '{','}',前者表示數(shù)組,后者表示字典.

NSJSONSerialization 解析過程:

1.獲取文件路徑

2.獲取文件內(nèi)容

3.解析

簡(jiǎn)單小例子:

 1 - (IBAction)parserJSON:(id)sender { 2      3     //獲取文件路徑 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     //數(shù)據(jù)封裝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:(代碼)

 1 - (IBAction)parserJSONWithJESONKIT:(id)sender { 2      3     //獲取文件路徑 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     //讓jesonKIT 解析 JSON 數(shù)據(jù)10     NSMutableArray *array = [JSONStr objectFromJSONString];11     NSLog(@"%ld",array.count);12     //數(shù)據(jù)封裝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 }