NSString 检查是否包含该字符

NSString *temp = @"english, french, japanese, chinese";
NSString *jap = @"japanese";
NSRange foundObj=[temp rangeOfString:jap options:NSCaseInsensitiveSearch];
if(foundObj.length>0) { 
    NSLog(@"Yes ! Jap found"); 
} else {
    NSLog(@"Oops ! no jap"); 
}

4.从某一个字符串中的一个字符串开始截取
 
NSString *a =@"/pubic/evdaily.nsf/vwtrymaindocid/8E88469482579180035442A/$file/测试帐号及信息22.docx";
NSRange range = [a rangeOfString:@"$file/"];//获取$file/的位置
NSString *b = [a substringFromIndex:range.location + 
range.length];//开始截取
NSLog(@"\n b: %@",b);