IOS正则表达式判断输入类型(整理)

在开发过程中，有时需要对用户输入的类型做判断，最常见是在注册页面即用户名和密码，代码整理如下：

只能为中文

-(bool)onlyinputchinesecharacters:(nsstring*)string{
 nsstring *zhstring = @"[\u4e00-\u9fa5]+";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",zhstring];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

只能为数字

- (bool)onlyinputthenumber:(nsstring*)string{
 nsstring *numstring =@"[0-9]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",numstring];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

只能为小写

- (bool)onlyinputlowercaseletter:(nsstring*)string{
 nsstring *regex =@"[a-z]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

*只能为大写

- (bool)onlyinputacapital:(nsstring*)string{
 nsstring *regex =@"[a-z]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

允许大小写

- (bool)inputcapitalandlowercaseletter:(nsstring*)string{
 nsstring *regex =@"[a-za-z]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

允许含大小写或数字(不限字数)

- (bool)inputlettersornumbers:(nsstring*)string{
 nsstring *regex =@"[a-za-z0-9]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

允许含大小写或数字(限字数)

-(bool)inputnumberorletters:(nsstring*)name {
 nsstring *usernameregex = @"^[a-za-z0-9]{6,20}+$";
 nspredicate *usernamepredicate = [nspredicate predicatewithformat:@"self matches %@",usernameregex];
 bool inputstring = [usernamepredicate evaluatewithobject:name];
 return inputstring;
}

允许汉字或数字(不限字数)

- (bool)inputchineseornumbers:(nsstring*)string{
 nsstring *regex =@"[\u4e00-\u9fa5]+[0-9]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

允许汉字或数字(限字数)

- (bool)inputchineseornumberslimit:(nsstring*)string{
 nsstring *regex =@"[\u4e00-\u9fa5][0-9]{6,20}+$";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

允许汉字，大小写或数字(不限字数)

- (bool)inputchineseorlettersandnumbersnum:(nsstring*)string{
 nsstring *regex =@"[\u4e00-\u9fa5]+[a-za-z0-9]*";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

允许汉字，大小写或数字(限字数)

- (bool)inputchineseorlettersnumberslimit:(nsstring*)string{
 nsstring *regex =@"[\u4e00-\u9fa5]+[a-za-z0-9]{6,20}+$";
 nspredicate *predicate = [nspredicate predicatewithformat:@"self matches %@",regex];
 bool inputstring = [predicate evaluatewithobject:string];
 return inputstring;
}

以上所述是小编给大家介绍的ios正则表达式判断输入类型(整理)，希望对大家有所帮助