ObjC－ NSArray->JSON | NSArray->NSData

 

 // NSArray -> JSON
NSArray *arr = [NSArray arrayWithObjects:@"1",@"2b",@"3c", nil];
// NSArray -> JSON
NSString *str = [arr JSONRepresentation];
NSLog(@"%@",str);


// 歸檔 NSArray -> NSData
// 編碼
NSMutableData *data = [NSMutableData dataWithCapacity:0];
NSKeyedArchiver *arch = [[NSKeyedArchiver alloc]initForWritingWithMutableData:data];
// 編碼
[arch encodeObject:arr forKey:@"arr"];
// 結束編碼
[arch finishEncoding];

//解碼
NSKeyedUnarchiver *unarch = [[NSKeyedUnarchiver alloc]initForReadingWithData:data];
NSArray *tmpArr = [unarch decodeObjectForKey:@"arr"];
[unarch finishDecoding];
NSLog(@"tmpArr : %@",tmpArr);