如何使用UITextview增加视图大小？ [英] How to increase View size with UITextview?

问题描述

我做了一个示例演示，当我输入 UITextview 时，它会扩展，但视图不会扩展，这是 UITextview的超级视图。

I have made one sample demo ,When I type on UITextview it Will Expands but the view will not expand which is the super view of UITextview.

- (void)textViewDidChange:(UITextView *)textView
{
    CGFloat fixedWidth = textView.frame.size.width;
    CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
   CGRect newFrame = textView.frame;
    newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
    textView.frame = newFrame;
   self.myTextView.scrollEnabled = NO;

    CGRect viewFrame = self.myCommentView.frame;
    viewFrame.size.height =self.myCommentView.frame.size.height + 1;
    viewFrame.origin.y=self.myCommentView.frame.origin.y - 1;
    self.myCommentView.frame =viewFrame;
    [self.myTextView layoutIfNeeded];
    [self.myCommentView layoutIfNeeded];
}

问题是

视图未按 UITextview 进行扩展。如果视图扩展 UITextview 未扩展。

Problem Is

View is not expanding with UITextview.And If View Is Expanded UITextview is not Expanding.

我希望两者都应该在 UITextview 展开时展开。

谢谢

推荐答案

声明 UITextViewDelegate 委托方法。

@property (strong, nonatomic) IBOutlet UITextView *txtview;
@property (strong, nonatomic) IBOutlet NSLayoutConstraint *backgroundviewhight; // myview hight constrain. 
@property (strong, nonatomic) IBOutlet UIView *myview; 

_txtview.delegate = self; 



 - (void)textViewDidChange:(UITextView *)textView
 {
        CGFloat fixedWidth = textView.frame.size.width;
        CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
        CGRect newFrame = textView.frame;
        newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
        textView.frame = newFrame;
        self.txtview.scrollEnabled = NO;
        _backgroundviewhight.constant = newFrame.size.height;
        [self.txtview layoutIfNeeded];
        [self.myview layoutIfNeeded];
  }

您的textview约束

Your textview constrain like

创建约束你的myview hight约束的NSLayoutConstraint

create a constrain NSLayoutConstraint of your myview hight constrain

输出：

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