iOS--关于判断输入的密码是否合法,价格动态判断合法性
一:正则表达式再用
#pragma 正则匹配手机号
+ (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;
}
#pragma 正则匹配用户身份证号
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;
}
二 TextFiled的代理方法
//////// 特殊字符的限制输入，价格金额的有效性判断
#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:@"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;
}