ios - SKViewbounds.size 在触摸事件上反转(Sprite Kit)

Question

请帮助我理解以下行为(iOS Sprite Kit)。

我下面给出的代码的输出是:

1.skView.bounds.size = 768.00, 1024.00

2.skView.bounds.size = 1024.00, 768.00

如上所示，宽度和高度在两种方法之间切换，这导致我的第二个场景无法以正确的比例呈现。

我的游戏将仅在横向模式下运行，这意味着事实上，第二个宽度 x 高度比是正确的(尽管它是第一个以正确的宽高比渲染场景的，这本身就是一个谜对我来说)。

谁能告诉我如何解决这个问题？我做错了什么？

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.currentGameState = GS_INTRO_SCENE;

    // Configure the view.
    SKView * skView = (SKView *)self.view;
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;

    // Create and configure the scene.

    printf("1.skView.bounds.size = %.2f, %.2f\n", skView.bounds.size.width, skView.bounds.size.height);

    SKScene *scene = [SKTGameIntroScene sceneWithSize:skView.bounds.size];
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene.
    [skView presentScene:scene];
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    if (self.currentGameState == GS_INTRO_SCENE) {
        self.currentGameState = GS_GAME_PLAY;

        SKView * skView = (SKView *)self.view;

        printf("2.skView.bounds.size = %.2f, %.2f\n", skView.bounds.size.width, skView.bounds.size.height);

        SKScene *nextScene = [SKTMyScene sceneWithSize:skView.bounds.size];
        nextScene.scaleMode = SKSceneScaleModeAspectFill;

        SKTransition *fadeIn = [SKTransition fadeWithDuration:5.0f];

        [skView presentScene:nextScene transition:fadeIn];
    }
}

我提前非常感谢。

** 编辑:**

@giorashc 解决了我的问题，建议我将场景启动移至 -(void)viewWillLayoutSubviews 方法。

但是我的第二个场景仍然被拉伸(stretch)......这是更改后 SKTViewController.m 的完整代码(有人能说为什么第二个 View 仍然被拉伸(stretch)吗？):

//
//  SKTViewController.m
//  SpriteKitTest
//
//  Created by Claudia Dazcal on 13/07/14.
//  Copyright (c) 2014 DazcalFamily_inc. All rights reserved.
//

#import "SKTViewController.h"
#import "SKTMyScene.h"
#include "SKTGameIntroScene.h"

typedef enum
{
    GS_INTRO_SCENE,
    GS_GAME_PLAY
}GameStates;

@interface SKTViewController ()

@property GameStates currentGameState;
@property BOOL firstSceneLoaded;

@end

@implementation SKTViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.currentGameState = GS_INTRO_SCENE;

    self.firstSceneLoaded = NO;

}

-(void)viewWillLayoutSubviews
{
    if (!self.firstSceneLoaded) {
        self.firstSceneLoaded = YES;

        // Configure the view.
        SKView * skView = (SKView *)self.view;
        skView.showsFPS = YES;
        skView.showsNodeCount = YES;

        // Create and configure the scene.

        printf("1.skView.bounds.size = %.2f, %.2f\n", skView.bounds.size.width, skView.bounds.size.height);

        SKScene *scene = [SKTGameIntroScene sceneWithSize:skView.bounds.size];
        scene.scaleMode = SKSceneScaleModeAspectFill;

        // Present the scene.
        [skView presentScene:scene];

    }

}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    if (self.currentGameState == GS_INTRO_SCENE) {
        self.currentGameState = GS_GAME_PLAY;

        SKView * skView = (SKView *)self.view;

        printf("2.skView.bounds.size = %.2f, %.2f\n", skView.bounds.size.width, skView.bounds.size.height);

        //CGSize DebugSize = CGSizeMake(skView.bounds.size.height, skView.bounds.size.width);

        //SKScene *nextScene = [SKTMyScene sceneWithSize:DebugSize];
        SKScene *nextScene = [SKTMyScene sceneWithSize:skView.bounds.size];
        nextScene.scaleMode = SKSceneScaleModeAspectFill;

        //SKTransition *fadeIn = [SKTransition fadeWithDuration:5.0f];

        //[skView presentScene:nextScene transition:fadeIn];
        [skView presentScene:nextScene];
    }
}

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    } else {
        return UIInterfaceOrientationMaskAll;
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

@end

* 编辑 2 **

好的，现在一切都解决了。

@giorashc 当他建议将场景启动移动到 viewWillLayoutSubviews 时立即解决了我的问题。事实证明，由于我之前使用了错误的边界，所以我使用错误的值设置了原始场景，现在它已修复，它看起来很拉伸(stretch)。

但现在已经修复了。非常感谢@giorashc!!

Answer 1

在 viewWillLayoutSubviews 方法中初始化场景。在此方法中， View 边界已正确更新。

请确保仅初始化场景一次，因为每当 View Controller 呈现另一个 View Controller 或应用程序更改其方向时都会调用此方法。