iOS UITextField或UITextView的內容是否為空

//判斷正在編輯的UITextField或UITextView的內容是否為空，判斷正在編輯的UITextField或UITextView的內容是否為空，以此來控制button的點亮狀態

#pragma mark- UITextFieldDelegate

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

    NSMutableString * changedString=[[NSMutableString alloc]initWithString:textField.text];

    [changedString replaceCharactersInRange:range withString:string];

    if (changedString.length!=0) {

        self.navigationItem.rightBarButtonItem.enabled=YES;

    }else{

        self.navigationItem.rightBarButtonItem.enabled=NO;

    }

    return YES;

}

#pragma mark- UITextViewDelegate

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text

{

    NSMutableString * changedString=[[NSMutableString alloc]initWithString:textView.text];

    [changedString replaceCharactersInRange:range withString:text];

    if (changedString.length!=0) {

        self.navigationItem.rightBarButtonItem.enabled=YES;

    }else{

        self.navigationItem.rightBarButtonItem.enabled=NO;

    }

    return YES;

}

//一些判斷技巧

- (BOOL)verifyData{

    if(tfPostName.text.length<1){

        //01

        tfPostName.layer.borderColor = [UIColor redColor].CGColor;

       tfPostName.layer.borderWidth =1.0;

        tfPostName.layer.cornerRadius =5.0;

        return NO;

    }

    else if (tfPositionType.text.length<1){

        //02

        tfPositionType.layer.borderColor = [UIColor redColor].CGColor;

        tfPositionType.layer.borderWidth =1.0;

        tfPositionType.layer.cornerRadius =5.0;

        return NO;

    }

    else if ( tfPeopleNum.text.length<1){

        //03

         tfPeopleNum.layer.borderColor = [UIColor redColor].CGColor;

         tfPeopleNum.layer.borderWidth =1.0;

         tfPeopleNum.layer.cornerRadius =5.0;

        return NO;

    }

    else if ( tfWages.text.length<1){

        //04

         tfWages.layer.borderColor = [UIColor redColor].CGColor;

         tfWages.layer.borderWidth =1.0;

         tfWages.layer.cornerRadius =5.0;

        return NO;

    }else if (tfUnit.text.length<1){

        //05

        tfUnit.layer.borderColor = [UIColor redColor].CGColor;

        tfUnit.layer.borderWidth =1.0;

        tfUnit.layer.cornerRadius =5.0;

        return NO;

    }else if (tfStartDate.text.length<1){

        //07

        tfStartDate.layer.borderColor = [UIColor redColor].CGColor;

        tfStartDate.layer.borderWidth =1.0;

        tfStartDate.layer.cornerRadius =5.0;

        return NO;

    }else if (tfEndDate.text.length<1){

        //08

        tfEndDate.layer.borderColor = [UIColor redColor].CGColor;

        tfEndDate.layer.borderWidth =1.0;

        tfEndDate.layer.cornerRadius =5.0;

        return NO;

    }else if (tfSescribe.text.length<1){

        //09

        tfSescribe.layer.borderColor = [UIColor redColor].CGColor;

        tfSescribe.layer.borderWidth =1.0;

        tfSescribe.layer.cornerRadius =5.0;

        //tfSescribe.text.length == 0;

        return NO;

    }

//    }else if (tfPayWay.text.length<1){

    //tfSescribe

//        //10--

//       tfPayWay.layer.borderColor = [UIColor redColor].CGColor;

//       tfPayWay.layer.borderWidth =1.0;

//       tfPayWay.layer.cornerRadius =5.0;

//        return NO;

//        

//    }

        else if (tfContactPerson.text.length<1){

        //11

        tfContactPerson.layer.borderColor = [UIColor redColor].CGColor;

       tfContactPerson.layer.borderWidth =1.0;

       tfContactPerson.layer.cornerRadius =5.0;

        return NO;

    }

    else if ( tfContactPhone.text.length<1){

        //12--

       tfContactPhone.layer.borderColor = [UIColor redColor].CGColor;

       tfContactPhone.layer.borderWidth =1.0;

       tfContactPhone.layer.cornerRadius =5.0;

        return NO;

    }else if (tfJobArea.text.length<1){

        //13

        tfJobArea.layer.borderColor = [UIColor redColor].CGColor;

        tfJobArea.layer.borderWidth =1.0;

        tfJobArea.layer.cornerRadius =5.0;

        return NO;

    }

    else if (tfDetailAddress.text.length<1){

        //14--

        tfDetailAddress.layer.borderColor = [UIColor redColor].CGColor;

        tfDetailAddress.layer.borderWidth =1.0;

        tfDetailAddress.layer.cornerRadius =5.0;

        return NO;

    }else if (tfUnit.text.length<1){

        //15

        tfUnit.layer.borderColor = [UIColor redColor].CGColor;

        tfUnit.layer.borderWidth =1.0;

        tfUnit.layer.cornerRadius =5.0;

        return NO;

    }

    else {

        return YES;

    }

}

//崗位描述不能為空的判斷

#pragma mark- UITextViewDelegate

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

{

    NSMutableString * changedString=[[NSMutableString alloc]initWithString:tfSescribe.text];

    [changedString replaceCharactersInRange:range withString:text];

    if (changedString.length<1) {

        //self.navigationItem.rightBarButtonItem.enabled=YES;

         [CMNavBarNotificationView notifyWithText:@"" andDetail:@"請完善發布信息"];

    }else{

        //self.navigationItem.rightBarButtonItem.enabled=NO;

        //[CMNavBarNotificationView notifyWithText:@"" andDetail:@"請完善發布信息"];

    }

    return YES;

}