在静态表格视图中动态调整文本视图和表格视图单元格的大小 [英] Resize text view and table view cell dynamically in static table view

问题描述

我有一个静态表视图，我将它用作我的应用程序的数据条目.其中一个单元格中有一个 UITextView ，它需要随着用户键入而动态地增长和收缩，以及单元格随着它的逻辑增长/收缩.我阅读了很多关于此的帖子，但我认为我被抛出了，因为我使用的是 STATIC 表视图.

I have a static table view that I am using as a sot of data entry for my app. One of those cells has a UITextView in it, which needs to grow and shrink dynamically as the user types, as well as the cell growing/shrinking logically with it. I read a bunch of posts on this but I think I am getting thrown because I am using a STATIC table view.

这是我调整大小的尝试(几乎完全失败):

Here is my resizing attempt (its pretty much a total fail):

- (void)textViewDidChange:(UITextView *)textView
{
    self.numberOfLines = (textView.contentSize.height / textView.font.lineHeight) - 1;

    float height = 44.0;
    height += (textView.font.lineHeight * (self.numberOfLines - 1));

    CGRect textViewFrame = [textView frame];
    textViewFrame.size.height = height - 10.0; //The 10 value is to retrieve the same height padding I inputed earlier when I initialized the UITextView
    [textView setFrame:textViewFrame];

    [self.tableView beginUpdates];
    [self.tableView endUpdates];

    [self.messageTextView setContentInset:UIEdgeInsetsZero];
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    float height = 44.0;
    if (self.messageTextView) {
        height += (self.messageTextView.font.lineHeight * (self.numberOfLines - 1));
    }
    return height;
}

我会接受任何提示！谢谢.

I'll take any tips! Thanks.

推荐答案

您无需执行任何操作，只需通过以下代码:-有一个新的函数来代替 sizeWithFont，它是 boundingRectWithSize.

You don't have to do anything just go through this code:- There is a new function to replace sizeWithFont, which is boundingRectWithSize.

在我的项目中添加如下函数，使用iOS7上的新函数，iOS 7以下的旧函数，语法与sizeWithFont基本相同:

   -(CGSize)text:(NSString*)text sizeWithFont:(UIFont*)font constrainedToSize:(CGSize)size{
        if(IOS_NEWER_OR_EQUAL_TO_7){
            NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
                                              font, NSFontAttributeName,
                                              nil];

            CGRect frame = [text boundingRectWithSize:size
                                              options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading)
                                           attributes:attributesDictionary
                                              context:nil];

            return frame.size;
        }else{
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
            return [text sizeWithFont:font constrainedToSize:size];
#pragma clang diagnostic pop
        }
    }

您可以将 IOS_NEWER_OR_EQUAL_TO_7 添加到您项目中的 prefix.pch 文件中:

#define IOS_NEWER_OR_EQUAL_TO_7 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] >= 7.0 )

我从这个链接提到:-

iOS 7 中具有 UITextView 高度的 UITableViewCell?

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