NSArray *array = @[ @1, @2, @3, @4, @5, @3 ];// 1. NSArray与NSData相互转化// NSArray to NSDataNSError *error;NSData *arrayData = [NSJSONSerialization dataWithJSONObject:array options:NSJSONWritingPrettyPrinted error:&error];if (!error) {NSLog(@"arrayData = %@", arrayData);} else {NSLog(@"%@", error);}// NSData to NSArrayNSArray *data2Array = [NSJSONSerialization JSONObjectWithData:arrayData options:NSJSONReadingMutableLeaves error:&error];if (!error) {NSLog(@"data2Array = %@", data2Array);} else {NSLog(@"%@", error);}// 2. NSArray与NSString相互转化// NSArray to NSStringNSString *arrayStr = [array componentsJoinedByString:@","];NSLog(@"arrayStr = %@", arrayStr);// NSString to NSArrayNSArray *string2Array = [arrayStr componentsSeparatedByString:@","];NSLog(@"string2Array = %@", string2Array);NSDictionary *dictionary = @{ @"name": @"xue zhang", @"sex": @1, @"age": @25 };// 3. dictionary与NSData相互转化// NSArray to NSDataNSData *dictionaryData = [NSJSONSerialization dataWithJSONObject:dictionary options:NSJSONWritingPrettyPrinted error:&error];if (!error) {NSLog(@"dictionaryData = %@", dictionaryData);} else {NSLog(@"%@", error);}// NSData to NSDictionaryNSDictionary *data2Dictionary = [NSJSONSerialization JSONObjectWithData:dictionaryData options:NSJSONReadingMutableLeaves error:&error];if (!error) {NSLog(@"data2Dictionary = %@", data2Dictionary);} else {NSLog(@"%@", error);}// 4. NSDictionary与NSString相互转化// NSDictionary to NSStringNSString *dictionaryStr = [[NSString alloc] initWithData:dictionaryData encoding:NSUTF8StringEncoding];NSLog(@"dictionaryStr = %@", dictionaryStr);// NSString to NSArrayNSDictionary *string2Dictionary = [NSJSONSerialization JSONObjectWithData:[dictionaryStr dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableLeaves error:&error];NSLog(@"string2Dictionary = %@", string2Dictionary);