问题
I usually use viewDidAppear method to do some UI stuff on the view after it finished appearing and I used this method in various situations were it was very useful, however, I need to do some UI changes on a UITableViewCell after it finished appearing, is there any available method in the SDK that does a similar job like viewDidAppear but for UITableViewCell ?
p.s. willDisplayCell did not work in my case, I need something like didDisplayCell if it really exists.
回答1:
The UITableViewDelegate has these functions:
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath)
func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath)
The cell itself does not have callbacks for this.
回答2:
If you need to respond to changes to the cell's frame and adjust the layout, you need to implement -layoutSubviews in the cell class. Remember to call [super layoutSubviews].
回答3:
The method viewDidLoad is related to UIViewController and its subclasses, so we cannot use this in UITableViewCell, which is a UIView subclass. The solution I used in one of my app is to override the layoutSubViews method of UITableViewCell, and I delayed the action for some time as below.
- (void)layoutSubViews
{
[super layoutSubviews];
[self performSelector:@selector(myMethod) withObject:nil afterDelay:1.0];
}
来源：https://stackoverflow.com/questions/10772272/viewdidappear-for-uitableviewcell