我要评论在开发过程中，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
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