这篇文章将为大家详细讲解有关IOS正则表达式判断输入类型，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
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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;
}关于“IOS正则表达式判断输入类型”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
