[课堂实践与项目]UITableView 长按Cell出现选择（剪切，复制，粘贴，全选）菜单并执行相应的操作

本文介绍了如何在UITableView中实现长按Cell显示剪切、复制、粘贴和全选等操作的菜单，并详细讲解了其实现过程，主要通过代理方法完成。

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1.我们首先来看看效果

2.实现的方法很简单，只需要实现代理中的三个方法即可。

//允许 Menu菜单
- (BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return YES;
}

//每个cell都会点击出现Menu菜单
- (BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
    return YES;
}

- (void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
    if (action == @selector(copy:)) {
        [UIPasteboard generalPasteboard].string = [self.array objectAtIndex:indexPath.row];
    }
    if (action == @selector(cut:)) {
        [UIPasteboard generalPasteboard].string = [self.array objectAtIndex:indexPath.row];
        [self.array replaceObjectAtIndex:indexPath.row withObject:@""];
        
        [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];
        
        
    }
    
    if (action == @selector(paste:)) {
        NSString *pasteString = [UIPasteboard generalPasteboard].string;
        
        NSString *tempString = [NSString stringWithFormat:@"%@%@",[self.array objectAtIndex:indexPath.row],pasteString];
        
        [self.array replaceObjectAtIndex:indexPath.row withObject:tempString];
         [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];
    }

}