iOS输入数字验证

验证输入值为0~9之间一个数字

//数字验证
-(BOOL) isNumber:(NSString*)number {
    
    NSString *numberRegex = @"[0-9]";
    NSPredicate *numberTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", numberRegex];
    BOOL isMatch = [numberTest evaluateWithObject:number];
    if (!isMatch) {
        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"只能输入一个数字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
        [alert show];
    return NO;
    }
    return YES;
  
}

验证输入值为数字

//数字验证
-(BOOL) isNumber:(NSString*)number {
    
    NSString *numberRegex = @"[0-9]+";
    NSPredicate *numberTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", numberRegex];
    BOOL isMatch = [numberTest evaluateWithObject:number];
    if (!isMatch) {
        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"只能输入数字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
        [alert show];
    return NO;
    }
    return YES;
  
}