我有一个UITableView,用户可以向左滑动以显示动作(如iOS 8邮件).这一切都按预期工作.当用户点击单元格的某个部分时,我想触发这个.如何以编程方式调用此幻灯片动作？
当前行为：用户必须向左滑动单元才能公开操作按钮.
所需行为：用户在单元格上点击(操作按钮).单元格滑过以公开操作按钮.
解决方法
那么我找不到一个方法来编程,但是我想出了这个解决方法.当用户点击单元格时,我将鼠标左键动画(平移),立即显示“滑动我”按钮.这很快就颠倒了,所以细胞恢复正常.这提供了一个视觉提示,让用户知道他们可以滑动单元格：
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
__block UILabel *swipeLabel = [[UILabel alloc]initWithFrame:CGRectMake(cell.bounds.size.width,200,cell.bounds.size.height)];
swipeLabel.text = @" Swipe Me";
swipeLabel.backgroundColor = [UIColor greenColor];
swipeLabel.textColor = [UIColor whiteColor];
[cell addSubview:swipeLabel];
[UIView animateWithDuration:0.3 animations:^{
[cell setFrame:CGRectMake(cell.frame.origin.x - 100,cell.frame.origin.y,cell.bounds.size.width,cell.bounds.size.height)];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3 animations:^{
[cell setFrame:CGRectMake(cell.frame.origin.x + 100,cell.bounds.size.height)];
} completion:^(BOOL finished) {
[swipeLabel removeFromSuperview];
swipeLabel = nil;
}];
}];
}
希望这有助于某人.
请注意,您需要将tableViewCell的选择类型设置为none.否则灰色的酒吧会掩盖它.
更新.我以为我会发布更多Swifty版本：
func previewActions(forCellAt indexPath: IndexPath) {
guard let cell = tableView.cellForRow(at: indexPath) else {
return
}
let label: UILabel = {
let label = UILabel(frame: CGRect.zero)
label.text = " Swipe Me "
label.backgroundColor = .blue
label.textColor = .white
return label
}()
// Figure out the best width and update label.frame
let bestSize = label.sizeThatFits(label.frame.size)
label.frame = CGRect(x: cell.bounds.width - bestSize.width,y: 0,width: bestSize.width,height: cell.bounds.height)
cell.insertSubview(label,belowSubview: cell.contentView)
UIView.animate(withDuration: 0.3,animations: {
cell.transform = CGAffineTransform.identity.translatedBy(x: -label.bounds.width,y: 0)
label.transform = CGAffineTransform.identity.translatedBy(x: label.bounds.width,y: 0)
}) { (finished) in
UIView.animateKeyframes(withDuration: 0.3,delay: 0.25,options: [],animations: {
cell.transform = CGAffineTransform.identity
label.transform = CGAffineTransform.identity
},completion: { (finished) in
label.removeFromSuperview()
})
}
}
func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
previewActions(forCellAt: indexPath)
return
}
