ios – 如何从SKScene呈现UIViewController？

概述我通过Sprite Kit进入iOS,我认识到这是不明智的. 我的目标是在Game Over上显示一个“Share”按钮.轻击共享按钮应该呈现一个SLComposeViewController(Twitter Share).场景的内容不应该改变. 规定“游戏结束”的游戏逻辑生活在SKScene的子类SpriteMyScene.m中. 我可以在游戏中显示一个Share按钮： -(void)updat 我通过Sprite Kit进入iOS,我认识到这是不明智的.

我的目标是在Game Over上显示一个“Share”按钮.轻击共享按钮应该呈现一个SLComposeVIEwController(Twitter Share).场景的内容不应该改变.

规定“游戏结束”的游戏逻辑生活在SKScene的子类SpriteMyScene.m中.

我可以在游戏中显示一个Share按钮：

-(voID)update:(CFTimeInterval)currentTime {if (gameOver){  UIbutton *button = [UIbutton buttonWithType:UIbuttonTypeRoundedRect];                [button addTarget:self                           action:@selector(sendToController)                forControlEvents:UIControlEventtouchDown];                [button setTitle:@"Show VIEw" forState:UIControlStatenormal];                button.frame = CGRectMake(80.0,210.0,160.0,40.0);                [self.vIEw addSubvIEw:button];     }}- (voID)sendToController{    NSLog(@"ok");    SpriteVIEwController *vIEwController = [SpriteVIEwController alloc];    [vIEwController openTweetSheet];}

我遇到困难是试图让showTweetbutton方法工作.我的SpriteVIEwController.m看起来像这样：

- (voID)openTweetSheet    {     SLComposeVIEwController *tweetSheet = [SLComposeVIEwController                                           composeVIEwControllerForServiceType:                                           SLServiceTypeTwitter];    // Sets the completion handler.  Note that we don't kNow which thread the    // block will be called on,so we need to ensure that any required UI    // updates occur on the main queue    tweetSheet.completionHandler = ^(SLComposeVIEwControllerResult result) {        switch(result) {                //  This means the user cancelled without sending the Tweet            case SLComposeVIEwControllerResultCancelled:                break;                //  This means the user hit 'Send'            case SLComposeVIEwControllerResultDone:                break;        }    };    //  Set the initial body of the Tweet    [tweetSheet setinitialText:@"just setting up my twttr"];    //  Adds an image to the Tweet.  For demo purposes,assume we have an    //  image named 'larry.png' that we wish to attach    if (![tweetSheet addImage:[UIImage imagenamed:@"larry.png"]]) {        NSLog(@"Unable to add the image!");    }    //  Add an URL to the Tweet.  You can add multiple URLs.    if (![tweetSheet addURL:[NSURL URLWithString:@"http://twitter.com/"]]){        NSLog(@"Unable to add the URL!");    }    //  Presents the Tweet Sheet to the user    [self presentVIEwController:tweetSheet animated:NO completion:^{        NSLog(@"Tweet sheet has been presented.");    }];}

我总是在日志中得到这样的东西：

-[UIVIEw presentScene:]: unrecognized selector sent to instance 0x13e63d00 2013-10-17 18:40:01.611 Fix[33409:a0b] * Terminating app
due to uncaught exception ‘NSinvalidargumentexception’,reason:
‘-[UIVIEw presentScene:]: unrecognized selector sent to instance
0x13e63d00’

解决方法 您正在创建一个新的视图控制器,但不会显示它：

SpriteVIEwController *vIEwController = [SpriteVIEwController alloc];

我假设SpriteVIEwController是呈现您的SpriteMyScene,并且您想手动控制回呈现的SpriteVIEwController.

您需要在SpriteMyScene子类中保留对SpriteVIEwController的引用,然后在调用openTweetSheet时访问该引用.

在SpriteMyScene.h

@class SpriteVIEwController;@interface SpriteMyScene : SKScene@property (nonatomic,weak) SpriteVIEwController *spriteVIEwController;@end

在SpriteVIEwController.m

// somewhere you initialize your SpriteMyScene object,I'm going to call it myScenemyScene.spriteVIEwController = self;

在SpriteMyScene.m

#import "SpriteVIEwController.h"- (voID)sendToController{    NSLog(@"ok");    // use the already-created spriteVIEwController    [_spriteVIEwController openTweetSheet];}

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