如何使用社交框架呈现SKscene的UIViewController？ [英] How do I present UIViewController from SKscene with social framework?
问题描述
我正在制作像Flappy Bird这样的游戏。如何从SKScene呈现UIViewController？
首先，我告诉我的环境
- Mac OS X 10.9
- Xcode 5.0.2
- Sprite Kit（框架），social.framework（框架）添加到我的项目中
我的目标是在游戏结束时显示分享按钮。点击共享按钮图像应该呈现SLComposeViewController（Twitter共享）。场景的内容不应该改变。
我想解决下面的问题并将显示从GameOverScene更改为tweetSheet（显示）
由social.framework组成。
问题
[self presentViewController：tweetSheet animated：YES completion：nil] ;
//错误：'GameOverScene'没有可见的@interface声明选择器presentViewController：动画：完成：
我的编码文件如下（我提取了重要代码的部分内容）。
ViewController.h
import< UIKit / UIKit.h>
import< SpriteKit / SpriteKit.h>
import< iAd / iAd.h>
@interface ViewController：UIViewController< ADBannerViewDelegate>< br>
@end
GameOverScene.h
#import< SpriteKit / SpriteKit.h>
@class SpriteViewController;
@interface GameOverScene：SKScene {
}
@end
GameOverScene.m
#importGameOverScene.h
#importNewGameScene.h
#importMainScene.h
#import< Social / Social.h>
@implementation GameOverScene {
//推特按钮
SKSpriteNode * _twitterbutton;
}
- （id）initWithSize：（CGSize）size
{
if（self = [super initWithSize：size]）{
//创建twitter按钮来自Images.xcassets的twitterbutton图片
_twitterbutton = [SKSpriteNode spriteNodeWithImageNamed：@twitterbutton];
[_twitterbutton setSize：CGSizeMake（50,50）];
[_twitterbutton setPosition：CGPointMake（self.size.width / 2，self.size.height / 5 + 50）];
//添加推特按钮
[self addChild：_twitterbutton];
//再次，这很重要，否则我们无法确定按下了什么按钮
_twitterbutton.name = @twitterbutton;
[_twitterbutton setPosition：CGPointMake（self.size.width / 2，self.size.height / 5 + 50）]
}
return self;
}
- （void）touchesBegan：（NSSet *）触及withEvent：（UIEvent *）事件
{
//与NewGameScene相同menu
UITouch * touch = [touches anyObject];
CGPoint location = [touch locationInNode：self];
SKNode * node = [self nodeAtPoint：location];
//是否触摸了twitter按钮？
if（[node.name isEqualToString：@twitterbutton]）{
if（[SLComposeViewController isAvailableForServiceType：SLServiceTypeTwitter]）{
SLComposeViewController * tweetSheet = [SLComposeViewController composeViewControllerForServiceType：SLServiceTypeTwitter];
[tweetSheet setInitialText：@来自游戏的TestTweet !!];
[self presentViewController：tweetSheet animated：YES completion：nil];
** //错误：'GameOverScene'没有可见的@interface声明选择器presentViewController：动画：完成：**
}
}
ViewControlloer.m
#import ViewController.h
#importNewGameScene.h
@implementation ViewController
//将视图加载到我们的主类
- （void）loadView
{
self.view = [[SKView alloc] initWithFrame：[[UIScreen mainScreen] applicationFrame]];
}
//视图完成加载时执行
- （void）viewWillLayoutSubviews
{
[super viewDidLoad];
//将调整大小模式设置为灵活宽度和高度
[self.view setAutoresizingMask：UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
//从原始视图创建我们的视图
//确保保留originalContentView，否则应用程序将崩溃
SKView * skView =（SKView *）self.originalContentView ;
//我们根据当前尺寸创建一个新的NewGameScene
SKScene * scene = [NewGameScene sceneWithSize：skView.bounds.size];
//创建一个动画类型为淡入淡出且持续时间为.4秒的过渡类
SKTransition * transition = [SKTransition fadeWithDuration：.4];
//使用淡入淡出转换显示菜单视图（NewGameScene）
[skView presentScene：场景转换：转换];
}
@end
您无法在SKScene中呈现viewController，因为它实际上只在SKView上呈现。您需要一种方法向viewController发送消息，而viewController又将呈现viewController。为此，您可以使用委派。
将以下协议定义添加到SKScene的.h文件中：
@protocol sceneDelegate< NSObject>
- （void）showShareScreen;
@end
并在界面中声明一个委托属性：
@property（弱，非原子）id< sceneDelegate>代表;
然后，在您想要显示共享屏幕的位置，而不是行：
[self presentViewController：tweetSheet animated：YES completion：nil];
使用此行：
[self.delegate showShareScreen];
现在，在你的viewController的.h文件中，实现协议：
@interface ViewController：UIViewController< sceneDelegate>
并且，在您的.m文件中，在呈现场景之前添加以下行：
scene.delegate = self;
然后在那里添加以下方法：
- （void）presentShareScreen
{
if（[SLComposeViewController isAvailableForServiceType：SLServiceTypeTwitter]）
{
SLComposeViewController * tweetSheet = [SLComposeViewController
composeViewControllerForServiceType：SLServiceTypeTwitter];
[tweetSheet setInitialText：@来自游戏的TestTweet !!];
[self presentViewController：tweetSheet animated：YES completion：nil];
}
}
另一种方法是使用 NSNotificationCenter
保留 -presentShareScreen 方法，如上一个替代方案中所述。
将viewController添加为通知的监听器，其中 -viewDidLoad 方法：
[[NSNotificationCenter defaultCenter] addObserver：self selector：@selector（presentShareScreen）name：@showShareScreenobject：nil];
然后，在要显示此viewController的场景中，使用以下行： / p>
[[NSNotificationCenter defaultCenter] postNotificationName：@showShareScreen对象：nil];
I am making a game like Flappy Bird. How do I present a UIViewController from SKScene? First of all, I tell my environments
- Mac OS X 10.9
- Xcode 5.0.2
- Sprite Kit(framework), social.framework(framework) are added in my project
My goal is to display a "Share" button upon Game Over. Tapping the share button image should present a SLComposeViewController (Twitter Share). The contents of the scene should not change.
I'd like to solve bellow issue and change display from GameOverScene to tweetSheet(display)
composed with social.framework.
The issue
[self presentViewController:tweetSheet animated:YES completion:nil];
//Error:No visible @interface for 'GameOverScene' declares the selector "presentViewController":animated:completion:
My coding files are below(I extracted parts of important codes).
ViewController.h
import <UIKit/UIKit.h>
import <SpriteKit/SpriteKit.h>
import <iAd/iAd.h>
@interface ViewController : UIViewController<ADBannerViewDelegate><br>
@end
GameOverScene.h
#import <SpriteKit/SpriteKit.h>
@class SpriteViewController;
@interface GameOverScene : SKScene {
}
@end
GameOverScene.m
#import "GameOverScene.h"
#import "NewGameScene.h"
#import "MainScene.h"
#import <Social/Social.h>
@implementation GameOverScene {
//The twitter button
SKSpriteNode *_twitterbutton;
}
- (id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size]) {
//Creating the twitterbutton with the twitterbutton image from Images.xcassets
_twitterbutton = [SKSpriteNode spriteNodeWithImageNamed:@"twitterbutton"];
[_twitterbutton setSize:CGSizeMake(50, 50)];
[_twitterbutton setPosition:CGPointMake(self.size.width/2, self.size.height/5 + 50)];
//Adding the twitter button
[self addChild:_twitterbutton];
//Again, this is important, otherwise we can't identify what button is pressed
_twitterbutton.name = @"twitterbutton";
[_twitterbutton setPosition:CGPointMake(self.size.width/2, self.size.height/5 + 50)]
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//Same as in NewGameScene menu
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
//Is the twitter button touched?
if([node.name isEqualToString:@"twitterbutton"]){
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]){
SLComposeViewController *tweetSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
[tweetSheet setInitialText:@"TestTweet from the Game !!"];
[self presentViewController:tweetSheet animated:YES completion:nil];
**//Error:No visible @interface for 'GameOverScene' declares the selector "presentViewController":animated:completion:**
}
}
ViewControlloer.m
#import "ViewController.h"
#import "NewGameScene.h"
@implementation ViewController
//Loads the view onto our main class
- (void)loadView
{
self.view = [[SKView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
}
//Executes when view finishes loading
- (void)viewWillLayoutSubviews
{
[super viewDidLoad];
//Set the resize mode to flexible width and height
[self.view setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
//Create our view from our original view
//Make sure to leave originalContentView in, otherwise the app will crash
SKView *skView = (SKView *)self.originalContentView;
//We create a new NewGameScene according to the current dimensions
SKScene *scene = [NewGameScene sceneWithSize:skView.bounds.size];
//Create a transition class with animation type fade and a duration of .4 seconds
SKTransition *transition = [SKTransition fadeWithDuration:.4];
//Present the menu view (NewGameScene) with our fade in transition
[skView presentScene:scene transition:transition];
}
@end
You cannot present a viewController from within a SKScene as it is actually only being rendered on a SKView. You need a way to send a message to the viewController, which in turn will present the viewController. For this, you can use delegation.
Add the following protocol definition to your SKScene's .h file:
@protocol sceneDelegate <NSObject>
-(void)showShareScreen;
@end
And declare a delegate property in the interface:
@property (weak, nonatomic) id <sceneDelegate> delegate;
Then, at the point where you want to present the share screen, instead of the line:
[self presentViewController:tweetSheet animated:YES completion:nil];
Use this line:
[self.delegate showShareScreen];
Now, in your viewController's .h file, implement the protocol:
@interface ViewController : UIViewController <sceneDelegate>
And, in your .m file, add the following line before you present the scene:
scene.delegate = self;
Then add the following method there:
-(void)presentShareScreen
{
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
{
SLComposeViewController *tweetSheet = [SLComposeViewController
composeViewControllerForServiceType:SLServiceTypeTwitter];
[tweetSheet setInitialText:@"TestTweet from the Game !!"];
[self presentViewController:tweetSheet animated:YES completion:nil];
}
}
An alternate method would be to use NSNotificationCenter
Keep the -presentShareScreen method as described in the previous alternative.
Add the viewController as a listener to the notification in it's -viewDidLoad method:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(presentShareScreen) name:@"showShareScreen" object:nil];
Then, in the scene at the point where you want to show this viewController, use this line:
[[NSNotificationCenter defaultCenter] postNotificationName:@"showShareScreen" object:nil];
这篇关于如何使用社交框架呈现SKscene的UIViewController？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
