Json數(shù)據(jù)操作

1. 使用NSDictionary

    //創(chuàng)建一個字典
    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:@"value1",@"key1",@"value2",@"key2", nil];
    //或者是可以這樣創(chuàng)建字典
    NSDictionary *dict = @{@"key1":@"value1",@"key2":@"value2"};
    //創(chuàng)建一個 NSData 類型的東西，這就是Json數(shù)據(jù)
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil];
    //將Json數(shù)據(jù)轉(zhuǎn)換為字典
    NSDictionary *dict1 = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
    NSLog(@"%@",dict1);
   

2. 使用NSArray

    //從plist文件中讀取一個數(shù)組
    NSArray *arr = [NSArray arrayWithContentsOfURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"testlist" ofType:@"plist"]]];
    //檢查數(shù)組是否符合Json化的要求
    if ([NSJSONSerialization isValidJSONObject:arr]) {
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:arr options:NSJSONWritingPrettyPrinted error:nil];
    NSLog(@"%@",jsonData);
    }