将NSArray转换为NSData iOS Objective-C

Question

这是我的代码，但我无法获取数据

NSData *wrtData = [NSKeyedArchiver archivedDataWithRootObject:my_Array];

Answer 1

If you want to convert a NSArray to NSData you should make sure that all objects inside this array conform to NSCoding protocol . Same goes for NSDictionary .

Answer 2

Use this sample:

   NSArray *mapPoints = @[
                      @{ @"latitude":@"10.010490",
                          @"longitude":@"76.360779",
                          @"altitude":@"30.833334",
                          @"timestamp":@"11:17:23",
                          @"speed":@"0.00",
                          @"distance":@"0.00"
                      },
                      @{
                          @"latitude":@"10.010688",
                          @"longitude":@"76.361378",
                          @"altitude":@"28.546305",
                          @"timestamp":@"11:19:26",
                          @"speed":@"1.614",
                          @"distance":@"198.525711"
                      }
                      ];

NSLog(@"Countries array = %@",mapPoints);
NSData *mapPointsData = [NSKeyedArchiver archivedDataWithRootObject:mapPoints];
NSLog(@"countries data=%@",mapPointsData);
NSLog(@"mapPointsData to mapPointsArray = %@",[NSKeyedUnarchiver unarchiveObjectWithData:mapPointsData]);

Github link:

https://github.com/k-sathireddy/JsonArrayToNSData