1.NSString 转换成NSData 对象
NSData* xmlData = [@"testdata" dataUsingEncoding:NSUTF8StringEncoding];
2.NSData 转换成NSString对象
NSData * data; NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
3.NSData 转换成char*
NSData *data; char *test=[data bytes];
4.char* 转换成NSData对象
byte* tempData = malloc(sizeof(byte)*16); NSData *content=[NSData dataWithBytes:tempData length:16];
5.将JSON串转化为NSDictionary或NSArray
NSError *error = nil; id jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:&error];
6.将NSDictionary或NSArray转化为JSON串
NSError *error = nil; NSData *jsonData = [NSJSONSerialization dataWithJSONObject:theData options:NSJSONWritingPrettyPrinted error:&error];
附:如果类型出现错误:便会出现这种类型的错误:
时间: 2024-08-01 22:44:56