json解析NSJSONSerialization方法

// //1、json转换成对象

// NSString * path = [[NSBundle mainBundle] pathForResource:@"test.json" ofType:nil];

// NSData * data = [NSData dataWithContentsOfFile:path];

// NSDictionary * dic = [ NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

// NSArray * array = dic[@"class1"];

//

// for (NSDictionary * dic in array)

// {

//

// //2.对象转成data

// NSData * data = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];

// NSString * str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

// NSLog(@"%@", str);

//

// }