iOS--關於判斷輸入的密碼是否合法,價格動態判斷合法性

一:正則表達式再用


#pragma 正則匹配手機號

+ (BOOL)checkTelNumber:(NSString *) telNumber

{

     NSString *pattern = @^ 1 +[ 3578 ]+\d{ 9 };

     NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern];

     BOOL isMatch = [pred evaluateWithObject:telNumber];

     return isMatch;

}

 

 

#pragma 正則匹配用戶密碼 6 - 18 位數字和字母組合

+ (BOOL)checkPassword:(NSString *) password

{

     NSString *pattern = @^(?![ 0 - 9 ]+$)(?![a-zA-Z]+$)[a-zA-Z0- 9 ]{ 6 , 18 };

     NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern];

     BOOL isMatch = [pred evaluateWithObject:password];

     return isMatch;

      

}

 

#pragma 正則匹配用戶姓名, 20 位的中文或英文

+ (BOOL)checkUserName : (NSString *) userName

{

     NSString *pattern = @^[a-zA-Z一-龥]{ 1 , 20 };

     NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern];

     BOOL isMatch = [pred evaluateWithObject:userName];

     return isMatch;

      

}

 

 

#pragma 正則匹配用戶身份證號 15 或 18 位

+ (BOOL)checkUserIdCard: (NSString *) idCard

{

     NSString *pattern = @(^[ 0 - 9 ]{ 15 }$)|([ 0 - 9 ]{ 17 }([ 0 - 9 ]|X)$);

     NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern];

     BOOL isMatch = [pred evaluateWithObject:idCard];

     return isMatch;

}

 

#pragma 正則匹員工號, 12 位的數字

+ (BOOL)checkEmployeeNumber : (NSString *) number

{

     NSString *pattern = @^[ 0 - 9 ]{ 12 };

      

     NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern];

     BOOL isMatch = [pred evaluateWithObject:number];

     return isMatch;

      

}

 

#pragma 正則匹配URL

+ (BOOL)checkURL : (NSString *) url

{

     NSString *pattern = @^[ 0 -9A-Za-z]{ 1 , 50 };

     NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern];

     BOOL isMatch = [pred evaluateWithObject:url];

     return isMatch;

      

}

二 TextFiled的代理方法

//////// 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:@"肯定" 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:@"小數點後最多三位"];
            return NO;
        }
    }
    return YES;
}