NSString如何判断包含某字符串

NSString *temp = @"如何判断包含某字符串";

NSString *str = @"判断";

NSRange foundObj=[temp rangeOfString:str options:NSCaseInsensitiveSearch];

if(foundObj.length>0) {

NSLog(@"Yes ! str found");

}

else {    

NSLog(@"Oops ! no str");

}