在開發過程中，有時需要對用戶輸入的類型做判斷，最常見是在注冊頁面即用戶名和密碼，代碼整理如下：
只能為中文
-(BOOL)onlyInputChineseCharacters:(NSString*)string{ NSString *zhString = @"[/u4e00-/u9fa5]+"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",zhString]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}只能為數字
- (BOOL)onlyInputTheNumber:(NSString*)string{ NSString *numString =@"[0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",numString]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}只能為小寫
- (BOOL)onlyInputLowercaseLetter:(NSString*)string{ NSString *regex =@"[a-z]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}*只能為大寫
- (BOOL)onlyInputACapital:(NSString*)string{ NSString *regex =@"[A-Z]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}允許大小寫
- (BOOL)InputCapitalAndLowercaseLetter:(NSString*)string{ NSString *regex =@"[a-zA-Z]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}允許含大小寫或數字(不限字數)
- (BOOL)inputLettersOrNumbers:(NSString*)string{ NSString *regex =@"[a-zA-Z0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}允許含大小寫或數字(限字數)
-(BOOL)inputNumberOrLetters:(NSString*)name { NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$"; NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex]; BOOL inputString = [userNamePredicate evaluateWithObject:name]; return inputString;}允許漢字或數字(不限字數)
- (BOOL)inputChineseOrNumbers:(NSString*)string{ NSString *regex =@"[/u4e00-/u9fa5]+[0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}允許漢字或數字(限字數)
- (BOOL)inputChineseOrNumbersLimit:(NSString*)string{ NSString *regex =@"[/u4e00-/u9fa5][0-9]{6,20}+$"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString;}允許漢字，大小寫或數字(不限字數)
- (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;}允許漢字，大小寫或數字(限字數)
- (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;}以上所述是小編給大家介紹的IOS正則表達式判斷輸入類型(整理)，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對VEVB武林網網站的支持！
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