摘要：
//将NSData转化为NSStringNSString*str=[[NSStringalloc]initWithData:responseencoding:NSUTF8StringEncoding];//将NSString转化为NSData(NSString.h)-(NSData*)dataUsingEncoding:(NSStringEncoding)encoding;//载一个字符串中删除一个字符或字符串[_displaydeleteCharactersInRange:NSMakeRange(index_of_char_to_remove,1)];数学转换为字符串NSString*ret 阅读全文
