Self Sizing Cells使UITableView跳转 [英] Self Sizing Cells make UITableView jump
问题描述
我有一个UITableView，每个单元格都有一个图像和两个标签，正如你在第一张图片上看到的那样
I've got a UITableView, each cell has an image and two labels, as you can see on the first picture
所以我正在尝试使用自我调整大小的单元格，一切都是很棒，除了两件事：
So I am trying ti use self-sizing cells and everything is great, except 2 things:
1）第一和第二个单元格没有正确显示内容，但在我向下滚动然后返回它们之后一切正常。我试图在viewDidApper中使用[tableview reloadData]，但它没有帮助。首先观看不合适的标签。您可以在此视频中观看 https://www.youtube.com/watch?v=I9DGBl1c5vg
1) First and Second cell don't show content properly, but after I scroll down and then return to them everything is ok. I tried to use [tableview reloadData] in viewDidApper, but it doesn't help. Watch the labels at first they don't fit. You can watch it on this video https://www.youtube.com/watch?v=I9DGBl1c5vg
查看第一个单元格上的标签。
Look at the labels on the first cell.
2）这是一个艰难的标签。我正在滚动表格，一切都很好，但是当我选择行时问题就出现了。它正在推动我进入细节视图，但是当我按下返回并返回到主视图时，tableview跳转，所以我回到不选择的行，如果我滚动表格它不会滚动平滑，但是跳跃。以下是两个视频的链接，第一个显示滚动顺畅 https://www.youtube。 com / watch？v = 9wAICcZwfO4 如果我没有进入详细视图，第二个显示跳跃问题 https://www.youtube.com/watch?v=fRcQ3Za1wDM 。
2) It's a tough one. I'm scrolling the table and everything is great, but the problem happens, when I select the row. It's pushing me to detail view, but when I press "back" and return to master view, the tableview jumps,so I'm coming back not to the selected row, also if I scroll the table it doesn't scroll smooth, but jumps. Here are the links for two videos, first one shows that scroll is smooth https://www.youtube.com/watch?v=9wAICcZwfO4 if i don't go to detail view, and the second shows the jumping problem https://www.youtube.com/watch?v=fRcQ3Za1wDM .
绝对确定与自定义单元格相关联，因为如果我不使用它，这个问题都不会发生。如果您需要一个显示正确功能的视频，请告诉我。
It's absolutely sure connected with self sizing cells,because if I don't use it,none of this problem happens. If you need a video that shows the right functionality, tell me.
推荐答案
好的，我解决了这两个问题。
Okay, I solved both of the problems.
问题1
我添加了这两行
[cell.contentView setNeedsLayout];
[cell.contentView layoutIfNeeded];
- （UITableViewCell *）tableView：（UITableView * ）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath 在返回单元格之前
问题2
解决方案似乎非常简单。我只需要实现 viewWillDissapear 并重新加载数据，所以代码看起来像这样
The solution appeared to be very simple. I've just needed to implement viewWillDissapear and reload data in it, so the code looks like this
- (void)viewWillDisappear:(BOOL)animated;{
[super viewWillDisappear:animated];
[self.tableView reloadData];
}
对我来说解决方案很简单，如果它对某人不起作用，这里我发现了一些有用的链接。
1） UITableView布局混乱推送segue和返回。 （iOS 8，Xcode beta 5，Swift）
2） http://useyourloaf.com/blog/2014/08/07/self-sizing-table-view-cells.html
Solution for me was simple, if it doesn't work for someone, here I found some useful links.
1) UITableView layout messing up on push segue and return. (iOS 8, Xcode beta 5, Swift)
2) http://useyourloaf.com/blog/2014/08/07/self-sizing-table-view-cells.html
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