如何判断IOS正则表达式的输入类型
来源：爱站网时间：2021-06-22编辑：网友分享
在开发的过程当中，有时候是需要对用户输入的类型去做一些判断，比较常见的就是在注册页面即用户名和密码，那要如何判断IOS正则表达式的输入类型呢，大家一起和爱站技术频道小编来学习看看吧。
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;
}
爱站技术频道小编讲解的这篇如何判断IOS正则表达式的输入类型的文章，如果大家还有不懂的可以关注爱站技术频道小编，后续还会有更多正则表达式相关内容及教程，在此非常感谢朋友们一直以来的支持。
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