Question

我有一个Information:Gradle tasks [clean, :app:compileDebugSources, :app:compileDebugAndroidTestSources] :app:clean :app:preBuild UP-TO-DATE :app:preDebugBuild UP-TO-DATE :app:checkDebugManifest :app:preReleaseBuild UP-TO-DATE :app:prepareComAndroidSupportAppcompatV72211Library :app:prepareComAndroidSupportSupportV42211Library :app:prepareDebugDependencies，在按下时会使用public class Signs implements Listener { @EventHandler public void onSignChange(SignChangeEvent e) { if (e.getLine(0).equalsIgnoreCase("[shop]")) { Block attached = e.getBlock().getRelative(0, -1, 0); String name = e.getPlayer().getDisplayName(); if (!(attached.getType() == Material.CHEST)) e.getPlayer().sendMessage(ChatColor.RED + "Please place the shop on a chest!"); else { if (!e.getPlayer().hasPermission("shops.create")) e.getPlayer().sendMessage(ChatColor.RED + "You don't have permission to create a shop! (shops.create)"); else { if (!Arrays.asList("open", "closed").contains(e.getLine(1).toLowerCase())) { e.getPlayer().sendMessage(ChatColor.RED + "You must specify if the shop is open or closed on the second line!"); } else { boolean closed = true; if ("open".equalsIgnoreCase(e.getLine(1))) { closed = false; } String lineThree = closed ? "§cClosed" : "§aOpen"; e.setLine(3, lineThree); e.setLine(0, "§9[Shop]"); e.setLine(1, "§b" + name + "'s"); e.setLine(2, "§bShop"); e.getPlayer().sendMessage(ChatColor.GREEN + "Shop Created!"); e.getPlayer().playSound(e.getPlayer().getLocation(), Sound.LEVEL_UP, 10, 10); if(getConfig().getStringList(name) == null); } } } } } @EventHandler public void onPlayerInteract(PlayerInteractEvent e) { if (e.getAction().equals(Action.RIGHT_CLICK_BLOCK)) { Player p = e.getPlayer(); Block b = e.getClickedBlock(); Block a = b.getRelative(0, -1, 0); int ax = a.getX(); int ay = a.getY(); int az = a.getZ(); Material m = b.getType(); if (!(m == Material.SIGN_POST)) { return; } else { Sign sign = (Sign) e.getClickedBlock().getState(); if ((sign.getLine(0).equalsIgnoreCase("§9[Shop]"))) { if ((sign.getLine(3).equalsIgnoreCase("§aOpen"))) { p.sendMessage("I opened the shop!"); World world = e.getPlayer().getWorld(); Location chestLocation = new Location(world, ax, ay, az); } } } } } }打开文本消息对话框。但我有IBAction语句包含一些语句，我想让MFMessageComposeViewController＆＃34;无效＆＃34;如果其中一个if语句在同一个if上按下时为真。

所以我的问题很简单，我如何＆＃34;无效＆＃34;一个MFMessageComposeViewController？或者至少不显示对话框？

编辑（代码）：

IBAction

谢谢！

Answer 1

因为MFMessageComposeViewController也是UIViewController的一个实例。如果您不再需要它，可以使用dismissViewControllerAnimated将其关闭。

最好处理MFMailComposeViewControllerDelegate，这是一个示例代码：

- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
    NSLog(@"%@", error);
    switch (result) {
        case MFMailComposeResultCancelled: {
            [controller dismissViewControllerAnimated:YES completion:^(){
                [SVProgressHUD showInfoWithStatus:@"The email is cancelled"];
            }];
            break;
        }

        case MFMailComposeResultFailed: {

            [SVProgressHUD showErrorWithStatus:@"Failed to send"];

            break;
        }

        case MFMailComposeResultSaved: {
            [controller dismissViewControllerAnimated:YES completion:^(){
                [SVProgressHUD showErrorWithStatus:@"The draft is saved"];
            }];
            break;
        }

        case MFMailComposeResultSent: {
            [controller dismissViewControllerAnimated:YES completion:^(){
                [SVProgressHUD showSuccessWithStatus:@"Sent successfully"];
            }];
            break;
        }

        default:
            break;
    }
}

如何＆＃34;无效＆＃34; MFMessageComposeViewController（Obj-C）

1 个答案: