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正则怎样在ios里判断是否输入

时间:2021-07-01 10:21:17 帮助过:6人阅读

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

  1. -(BOOL)onlyInputChineseCharacters:(NSString*)string{
  2. NSString *zhString = @"[\u4e00-\u9fa5]+";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",zhString];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

只能为数字

  1. - (BOOL)onlyInputTheNumber:(NSString*)string{
  2. NSString *numString =@"[0-9]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",numString];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

只能为小写

  1. - (BOOL)onlyInputLowercaseLetter:(NSString*)string{
  2. NSString *regex =@"[a-z]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

*只能为大写

  1. - (BOOL)onlyInputACapital:(NSString*)string{
  2. NSString *regex =@"[A-Z]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

允许大小写

  1. - (BOOL)InputCapitalAndLowercaseLetter:(NSString*)string{
  2. NSString *regex =@"[a-zA-Z]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

允许含大小写或数字(不限字数)

  1. - (BOOL)inputLettersOrNumbers:(NSString*)string{
  2. NSString *regex =@"[a-zA-Z0-9]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

允许含大小写或数字(限字数)

  1. -(BOOL)inputNumberOrLetters:(NSString*)name {
  2. NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";
  3. NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex];
  4. BOOL inputString = [userNamePredicate evaluateWithObject:name];
  5. return inputString;
  6. }

允许汉字或数字(不限字数)

  1. - (BOOL)inputChineseOrNumbers:(NSString*)string{
  2. NSString *regex =@"[\u4e00-\u9fa5]+[0-9]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

允许汉字或数字(限字数)

  1. - (BOOL)inputChineseOrNumbersLimit:(NSString*)string{
  2. NSString *regex =@"[\u4e00-\u9fa5][0-9]{6,20}+$";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

允许汉字,大小写或数字(不限字数)

  1. - (BOOL)inputChineseOrLettersAndNumbersNum:(NSString*)string{
  2. NSString *regex =@"[\u4e00-\u9fa5]+[A-Za-z0-9]*";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

允许汉字,大小写或数字(限字数)

  1. - (BOOL)inputChineseOrLettersNumberslimit:(NSString*)string{
  2. NSString *regex =@"[\u4e00-\u9fa5]+[A-Za-z0-9]{6,20}+$";
  3. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
  4. BOOL inputString = [predicate evaluateWithObject:string];
  5. return inputString;
  6. }

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