iOS 判断字符串中含有某个字符串 rangeOfString

//判断roadTitleLab.text 是否含有qingjoin

if([roadTitleLab.text rangeOfString:@"qingjoin"].location !=NSNotFound)//_roaldSearchText
 {
   	NSLog(@"yes");
 }else {
   	NSLog(@"no");
}