iOS关于判断输入的密码是否合法,价格动态判断合法性详解手机开发

NSString *pattern = @^ 1 +[ 3578 ]+/d{ 9 }; NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern]; BOOL isMatch = [pred evaluateWithObject:telNumber]; return isMatch;
#pragma 正则匹配用户密码 6 - 18 位数字和字母组合 + (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 正则匹配用户姓名, 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;
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 正则匹员工号, 12 位的数字 + (BOOL)checkEmployeeNumber : (NSString *) number NSString *pattern = @^[ 0 - 9 ]{ 12 }; NSPredicate *pred = [NSPredicate predicateWithFormat: @SELF MATCHES %@, pattern]; BOOL isMatch = [pred evaluateWithObject:number]; return isMatch; #pragma 正则匹配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;
-(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:@"确定" 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:@"只能输入数字"]; 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:@"只能输入数字"]; 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:@"只能输入数字和小数点"]; return NO; if (NSNotFound != nDotLoc range.location nDotLoc + 3) { [self showMyMessage:@"小数点后最多三位"]; return NO; return YES;