TextViewを使用したscrollViewのスクロール

Question

scrollViewには、UIImageViewが1つ、UITextViewにscrollingEnabled = NOが含まれています。入力する位置でscrollViewをスクロールします。

- (void)createScrollView{ 
//TPKeyboardAvoidingScrollView *scrollView = [[TPKeyboardAvoidingScrollView alloc]init]; 
UIScrollView *scrollView = [[UIScrollView alloc]init]; 
//[self.view insertSubview:scrollView belowSubview:_mediaSelectionView]; 
[self.view addSubview: scrollView]; 
[scrollView setTranslatesAutoresizingMaskIntoConstraints: NO]; 
self.scrollView = scrollView; 
scrollView.showsHorizontalScrollIndicator = NO; 
scrollView.showsVerticalScrollIndicator = NO; 
scrollView.bouncesZoom = NO; 
scrollView.alwaysBounceVertical = YES; 
scrollView.clipsToBounds = YES; 
self.automaticallyAdjustsScrollViewInsets = YES; 
NSLayoutConstraint *scrollViewTop = [NSLayoutConstraint 
            constraintWithItem: scrollView 
            attribute: NSLayoutAttributeTop 
            relatedBy: NSLayoutRelationEqual 
            toItem: self.navigationBarBGView 
            attribute: NSLayoutAttributeBottom 
            multiplier: 1 constant:0.0 
            ]; 
NSLayoutConstraint *scrollViewLeading = [NSLayoutConstraint 
             constraintWithItem: scrollView 
             attribute: NSLayoutAttributeLeading 
             relatedBy: NSLayoutRelationEqual 
             toItem: self.view 
             attribute: NSLayoutAttributeLeading 
             multiplier: 1 constant:0.0 
             ]; 

NSLayoutConstraint *superViewTraling = [NSLayoutConstraint 
             constraintWithItem: self.view 
             attribute: NSLayoutAttributeTrailing 
             relatedBy: NSLayoutRelationEqual 
             toItem: scrollView 
             attribute: NSLayoutAttributeTrailing 
             multiplier: 1 constant:0.0 
             ]; 

NSLayoutConstraint *bottomLayoutGuideTop = [NSLayoutConstraint 
              constraintWithItem:self.view 
              attribute: NSLayoutAttributeBottom 
              relatedBy: NSLayoutRelationEqual 
              toItem: scrollView 
              attribute: NSLayoutAttributeBottom 
              multiplier: 1 constant:0.0 
              ]; 
//Add All Constrains. 
[self.view addConstraints: @[scrollViewTop , scrollViewLeading , superViewTraling , bottomLayoutGuideTop ]]; 

_contentView = [[UIView alloc]init]; 

[scrollView addSubview: _contentView]; 
[_contentView setConstraintFlag]; 
[_contentView setFullWidth]; 
[_contentView setTopFromParent:0]; 

}

- (void)createCommentTextView{ 
    UITextView *textView = [[UITextView alloc]init]; 
    textView.backgroundColor = [UIColor clearColor]; 
    textView.textColor = [UIColor colorWithR:67 G:83 B:83 A:1.0f]; 
    textView.delegate = self; 
    textView.scrollEnabled = NO;   
    _commentTextView = textView; 
    [_textViewContainer addSubview:textView]; 

}

-(void)updateContentSize{ 
self.scrollView.contentSize = CGSizeMake(self.scrollView.contentSize.width, self.contentView.frame.size.height); 

}

scrollViewは_contentViewとcontentViewはUITextViewを含ん含ま。 textViewの高さは、ユーザーの種類に応じて増加し、_contentViewのbottomはtextViewのbottomに等しくなります。

Answer 1

使用：
ポッド 'TPKeyboardAvoiding' または
https://github.com/michaeltyson/TPKeyboardAvoiding

ポッド 'AnimatedTextInput'
https://github.com/jobandtalent/AnimatedTextInput

Answer 2

私はいくつかの記事やブログを経ていますが、私は取得できませんでした私が望む正確な答え。その後、私は他の投稿やブログの助けを借りて何らかの解決策を考え出しました。これが役立つことを願っています。

- (void)scrollToCursor{ 
    if(self.currentTextView.selectedRange.location != NSNotFound) { 

    NSRange range = self.currentTextView.selectedRange; 

    NSString *string = [<YOUR_TEXTVIEW>.text substringToIndex:range.location]; 

    CGSize size = [string boundingRectWithSize:<YOUR_TEXTVIEW>.frame.size 
             options:NSStringDrawingUsesLineFragmentOrigin| NSStringDrawingUsesFontLeading 
            attributes:@{NSFontAttributeName:<YOUR_TEXTVIEW>.font} 
             context:nil].size; 

    NSInteger yPosition = (<YOUR_TEXTVIEW>.frame.origin.y+size.height+<OFFSET(if required)>); 


    NSInteger scrollViewVisibeYPositionStart = self.scrollView.contentOffset.y; 
    NSInteger scrollViewVisibeYPositionEnd = scrollViewVisibeYPositionStart+self.scrollView.frame.size.height; 

    BOOL needToSetOffset = NO; 

    if (yPosition > scrollViewVisibeYPositionEnd) { 
     yPosition = yPosition - self.scrollView.frame.size.height; 
     needToSetOffset = YES; 

    }else if (yPosition < scrollViewVisibeYPositionStart){ 
     yPosition = self.scrollView.frame.size.height + (scrollViewVisibeYPositionStart - yPosition); 
     needToSetOffset = YES; 
    } 

    if (needToSetOffset) { 
     CGPoint offset = CGPointMake(0,yPosition); 
     [self.scrollView setContentOffset:offset]; 
    } 
} 
}