草庐IT

如何制作仅允许1到31的数字[目标C]的文本场

-(BOOL)textField:(UITextField*)textFieldshouldChangeCharactersInRange:(NSRange)rangereplacementString:(NSString*)string{NSString*newString=[textField.textstringByReplacingCharactersInRange:rangewithString:string];if([newStringlength]>=1){NSString*sepStr=[newStringsubstringToIndex:1];return!([sepStrl