uiCollectionViewCell 调整单元格大小

Question

我不知道如何调整我的 UICollectionView 中的单元格的大小，当用户编写时其中的 UITextView 变大（就像我在下面的代码中所做的那样：）

-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
    if([text isEqualToString:@"\n"]){
        float widthLabel = 0.0f;

        UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];
        if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
            widthLabel = (screenWidth-6)-4-200;
        }else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
            widthLabel = (screenHeight-24)-4-200;
        }
        textView.frame = CGRectMake(2, 0, widthLabel, textView.frame.size.height+10);

    }
    if(text.length == 0 && [[textView.text substringWithRange:range] isEqualToString:@"\n"]){
        float widthLabel = 0.0f;

        UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];
        if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
            widthLabel = (screenWidth-6)-4-200;
        }else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
            widthLabel = (screenHeight-24)-4-200;
        }
        textView.frame = CGRectMake(2, 0, widthLabel, textView.frame.size.height-10);

    }
    return YES;
}

我想让包含此 UITextView 的项目单元格相对于 UITextView 变得更大/更小。我无法通过调整单元格的新高度并使用 reloadData 来更改大小，因为它会使键盘消失并且用户无法再书写。

Answer 1

我不确定，但我认为您可以尝试使布局无效并强制重绘 uicollectionview 布局。

看看这个：Resize UICollectionView cells after their data has been set