正则怎样在ios里判断是否输入

这次给大家带来正则怎样在ios里判断是否输入，正则在ios里判断是否输入的注意事项有哪些，下面就是实战案例，一起来看一下。

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;
}

相信看了本文案例你已经掌握了方法，更多精彩请关注其它相关文章！

推荐阅读：

正则怎样写才能匹配一组字符

正则的位置匹配使用详解

以上就是正则怎样在ios里判断是否输入的详细内容，更多请关注其它相关文章！