使用indexPath.row更改单元格图像

Question

Currently I'm using:

cell.imageView.image = [UIImage imageNamed:@"image.png"];

to change the image of the cell.

But how can I change it if I only know the indexPath.row?

I have tried:

[self.tableView cellForRowAtIndexPath:0].imageView.image = [UIImage imageNamed:@"image.png"];

Answer 1

try

  UITableVieCell *cell = [self.tableView cellForRowAtIndexPath:0];
  cell.imageView.image = ...

Answer 2

What exactly is your question? How can i change it if i only know the indexpath.row? This question doesnt make sense. All you need to change a certain cell is the indexPath .

UITableVieCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
cell.imageView.image = [UIImage imageNamed:@"myImage"];

This code is just a bit different from @JMD. His will only change the image for the very first cell. If you want every cell, cellForRowAtIndexPath will get called for each newly created cell. Therefore, inserting indexPath.row instead of 0 should do the trick.

Answer 3

你也可以这样

((UITableViewCell *)[self.tableView cellForRowAtIndexPath:0]).imageView.image = [UIImage imageNamed:@"image.png"];

Answer 4

You should write your cellForRowAtIndexPath so that it can determine which image to show, and call

[self.tableView reloadRowsAtIndexPaths:withRowAnimation:]

rather than calling cellForRowAtIndexPath directly. You should never call this method directly, as changes will not be permanent if you are using queued up cells. Make your cellForRowAtIndexPath method smart enough to determine what to show, and reload the row at the indexPath.