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
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-(BOOL)onlyInputChineseCharacters:(NSString*)string{
NSString *zhString = @"[\u4e00-\u9fa5]+";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",zhString];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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只能为数字
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- (BOOL)onlyInputTheNumber:(NSString*)string{
NSString *numString =@"[0-9]*";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",numString];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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只能为小写
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- (BOOL)onlyInputLowercaseLetter:(NSString*)string{
NSString *regex =@"[a-z]*";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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*只能为大写
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- (BOOL)onlyInputACapital:(NSString*)string{
NSString *regex =@"[A-Z]*";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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允许大小写
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- (BOOL)InputCapitalAndLowercaseLetter:(NSString*)string{
NSString *regex =@"[a-zA-Z]*";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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允许含大小写或数字(不限字数)
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- (BOOL)inputLettersOrNumbers:(NSString*)string{
NSString *regex =@"[a-zA-Z0-9]*";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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允许含大小写或数字(限字数)
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-(BOOL)inputNumberOrLetters:(NSString*)name {
NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";
NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex];
BOOL inputString = [userNamePredicate evaluateWithObject:name];
return inputString;
}
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允许汉字或数字(不限字数)
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- (BOOL)inputChineseOrNumbers:(NSString*)string{
NSString *regex =@"[\u4e00-\u9fa5]+[0-9]*";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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允许汉字或数字(限字数)
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- (BOOL)inputChineseOrNumbersLimit:(NSString*)string{
NSString *regex =@"[\u4e00-\u9fa5][0-9]{6,20}+$";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL inputString = [predicate evaluateWithObject:string];
return inputString;
}
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允许汉字，大小写或数字(不限字数)
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- (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;
}
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允许汉字，大小写或数字(限字数)
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- (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;
}
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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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！