在iOS开发中，我们可能有需求需要长按某个控件来复制内容。
第一种情况，直接使用tableview的方法来调用系统的复制剪切那个功能。
// 允许 Menu 菜单
-(BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0 && indexPath.row !=0) {
return YES;
}
return NO;
}
// 每个 Cell都会出现 Menu 菜单
-(BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
if (action == @selector(copy:)) {
return YES;
}
return NO;
}
// 拷贝、剪切、粘贴按钮的操作定义
-(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];
}
}
第二种是自定义(这里主要是改掉系统拷贝的名字为复制)
//在自定义cell中的init方法加入
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressCellHandle:)];
self.longGesture = longPressGesture;
[self addGestureRecognizer:longPressGesture];
//并加上几个方法
-(void)longPressCellHandle:(UILongPressGestureRecognizer *)gesture
{
[self becomeFirstResponder];
UIMenuController *menuController = [UIMenuController sharedMenuController];
UIMenuItem *copyItem = [[UIMenuItem alloc] initWithTitle:@"复制" action:@selector(menuCopyBtnPressed:)];
menuController.menuItems = @[copyItem];
[menuController setTargetRect:gesture.view.frame inView:gesture.view.superview];
[menuController setMenuVisible:YES animated:YES];
[UIMenuController sharedMenuController].menuItems=nil;
}
-(void)menuCopyBtnPressed:(UIMenuItem *)menuItem
{
[UIPasteboard generalPasteboard].string = self.messageLab.text;
}
-(BOOL)canBecomeFirstResponder
{
return YES;
}
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if (action == @selector(menuCopyBtnPressed:)) {
return YES;
}
return NO;
}
