NSString char * 之间的转换

//NSString 转换为char *

NSString *blankText = @"sevensoft is a mobile software outsourcing company";

char *ptr = [blankText cStringUsingEncoding:NSASCIIStringEncoding];

//char * 转换为 NSString

char encode_buf[1024];

NSString *encrypted = [[NSString alloc] initWithCString:(const char*)encode_buf encoding:NSASCIIStringEncoding];

          char mychar[100];

          mystring=[NSString stringWithFormat:@"%s",mychar];

          char[]转NSString有更简单的方法，NSString类方法：
          + (id)stringWithUTF8String:(const char *)bytes。

          NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

          NSString *str = [[NSString alloc] initWithCString:(char*) encoding:enc]; //使用NSUTF8StringEncoding编码无效时，改为如上编码进行尝试（中文能正常显示）

去两边空格

NSString *cleanString = [dirtyString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];