iOS開發中手機號碼和價格金額有效性判斷及特殊字符的限制

在實際開發過程中，經常會遇到些不能讓用戶隨便地輸入手機號碼，對輸入的手機號碼的正確判斷；有些輸入框只能輸入數字，不能輸入字母或特殊字符；還有些如價格金額之類的就只能輸入數字和小數點且小數點后面保留兩位。

///// 手機號碼的有效性判斷
//檢測是否是手機號碼
- (BOOL)isMobileNumber:(NSString *)mobileNum
{
    /**
     * 手機號碼
     * 移動：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     * 聯通：130,131,132,152,155,156,185,186
     * 電信：133,1349,153,180,189
     */
    NSString * MOBILE = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
    /**
     10         * 中國移動：China Mobile
     11         * 134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     12         */
    NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$";
    /**
     15         * 中國聯通：China Unicom
     16         * 130,131,132,152,155,156,185,186
     17         */
    NSString * CU = @"^1(3[0-2]|5[256]|8[56])\\d{8}$";
    /**
     20         * 中國電信：China Telecom
     21         * 133,1349,153,180,189
     22         */
    NSString * CT = @"^1((33|53|8[09])[0-9]|349)\\d{7}$";
    /**
     25         * 大陸地區固話及小靈通
     26         * 區號：010,020,021,022,023,024,025,027,028,029
     27         * 號碼：七位或八位
     28         */
    // NSString * PHS = @"^0(10|2[0-5789]|\\d{3})\\d{7,8}$";

    NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE];
    NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];
    NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];
    NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];

    if (([regextestmobile evaluateWithObject:mobileNum] == YES)
        || ([regextestcm evaluateWithObject:mobileNum] == YES)
        || ([regextestct evaluateWithObject:mobileNum] == YES)
        || ([regextestcu evaluateWithObject:mobileNum] == YES))
        {
        return YES;
        }
    else
        {
        return NO;
        }
}

//////// 特殊字符的限制輸入，價格金額的有效性判斷

#define myDotNumbers     @"0123456789.\n"
#define myNumbers          @"0123456789\n"
-(void) createTextFiled {
    textfield1_ = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
    textfield1_.delegate = self;
    [self addSubview:textfield1_];

     textfield2_ = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
    textfield2_.delegate = self;
    [self addSubview:textfield2_];

     textfield3_ = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
    textfield3_.delegate = self;
    [self addSubview:textfield3_];

}

-(void)showMyMessage:(NSString*)aInfo {

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:aInfo delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
    [alertView show];
    [alertView release];

}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    NSCharacterSet *cs;
    if ([textField isEqual:textfield1_]) {
        cs = [[NSCharacterSet characterSetWithCharactersInString:myNumbers] invertedSet];
        NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
        BOOL basicTest = [string isEqualToString:filtered];
        if (!basicTest) {
            [self showMyMessage:@"只能輸入數字"];
            return NO;
        }
    }
    else if ([textField isEqual:textfield2_]) {
        cs = [[NSCharacterSet characterSetWithCharactersInString:myNumbers] invertedSet];
        NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
        BOOL basicTest = [string isEqualToString:filtered];
        if (!basicTest) {
            [self showMyMessage:@"只能輸入數字"];
            return NO;
        }
    }
    else if ([textField isEqual:textfield3_]) {
        NSUInteger nDotLoc = [textField.text rangeOfString:@"."].location;
        if (NSNotFound == nDotLoc && 0 != range.location) {
            cs = [[NSCharacterSet characterSetWithCharactersInString:myDotNumbers] invertedSet];
        }
        else {
            cs = [[NSCharacterSet characterSetWithCharactersInString:myNumbers] invertedSet];
        }
        NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
        BOOL basicTest = [string isEqualToString:filtered];
        if (!basicTest) {

            [self showMyMessage:@"只能輸入數字和小數點"];
            return NO;
        }
        if (NSNotFound != nDotLoc && range.location > nDotLoc + 3) {
            [self showMyMessage:@"小數點后最多三位"];
            return NO;
        }
    }
    return YES;
}