SpriteKitの理解：スプライトの移動

Question

これは私の最初の投稿であり、AppleのSpriteKitフレームワークを使用しようとしています。

フレームワークを使用してスプライトを移動する方法について私が誤解していると思います。私はシンプルな例を持っています。ここでは、 "ヒーロー"の位置に応じて、UP、DOWN、LEFT、RIGHTの方向に、heroを簡単に移動したいと考えています。ヒーローがblockにヒットしたら、「ヒーロー」が止まるはずです。

テスト目的のために、私はちょうど "ヒーロー"の上のタップを画面の上部にあるブロックの壁に当てようとしています。その後、衝突が発生した後、「ヒーロー」の下をタップします。私は "ヒーロー"が一番下の行のブロックの壁に向かって移動することを期待していました。しかし、それは "英雄"が上の壁を介して上を移動し続けているようだ。私は根本的な欠陥を作っていると確信しています。私は助けていただければ幸いです。

ここ

static inline CGPoint CGPointSubtract(const CGPoint a, const CGPoint b) 
{ 
    return CGPointMake(a.x - b.x, a.y - b.y); 
} 

typedef enum DIRECTION_e 
{ 
    UP, 
    DOWN, 
    LEFT, 
    RIGHT 
} DIRECTION_t; 

typedef NS_OPTIONS(uint32_t, CNPhysicsCategory) 
{ 
    PhysicsCategoryBlock = 1 << 0, 
    PhysicsCategoryHero = 1 << 1 
}; 

@interface LevelScene() 
    @property (nonatomic) SKSpriteNode * hero; 
    @property (nonatomic) BOOL inMotion; 
@end 

@implementation LevelScene 

-(id) initWithSize:(CGSize)size 
{ 
    if (self = [super initWithSize:size]) 
    { 
     self.physicsWorld.gravity = CGVectorMake(0,0); 

     self.physicsWorld.contactDelegate = self; 

     [self createLevel]; 
     [self createHero]; 

     self.inMotion = NO; 
    } 
    return self; 
} 

- (void) createHero 
{ 
    [self addHeroAtRow:5 column:2]; 
} 

- (void) createLevel 
{ 
    self.backgroundColor = [SKColor blackColor]; 
    self.scaleMode = SKSceneScaleModeAspectFit; 

    [self addBlockAtRow:1 column:1]; 
    [self addBlockAtRow:1 column:2]; 
    [self addBlockAtRow:1 column:3]; 

    [self addBlockAtRow:10 column:1]; 
    [self addBlockAtRow:10 column:2]; 
    [self addBlockAtRow:10 column:3]; 
} 

- (void) addBlockAtRow:(NSInteger)row column:(NSInteger)column 
{ 
    SKSpriteNode *block = [[SKSpriteNode alloc] initWithColor:[SKColor brownColor]  size:CGSizeMake(64,64)]; 
    block.position = CGPointMake(32 + (column * 64), 32 + ((11-row) * 64)); 
    block.name = @"block"; 

    block.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:block.size]; 

    block.physicsBody.dynamic   = NO; 
    block.physicsBody.categoryBitMask = PhysicsCategoryBlock; 
    block.physicsBody.collisionBitMask = PhysicsCategoryBlock | PhysicsCategoryHero; 
    block.physicsBody.contactTestBitMask = PhysicsCategoryBlock | PhysicsCategoryHero; 

    [self addChild:block]; 
} 

- (void) addHeroAtRow:(NSInteger)row column:(NSInteger)column 
{ 
    self.hero = [[SKSpriteNode alloc] initWithColor:[SKColor redColor] size:CGSizeMake(64,64)]; 
    self.hero.position = CGPointMake(32 + (column * 64), 32 + ((11-row) * 64)); 
    self.hero.name = @"hero"; 
    self.hero.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(self.hero.size.width/2, self.hero.size.height/2)]; 
    self.hero.physicsBody.usesPreciseCollisionDetection = YES; 

    self.hero.physicsBody.dynamic   = YES; 
    self.hero.physicsBody.categoryBitMask = PhysicsCategoryHero; 
    self.hero.physicsBody.collisionBitMask = PhysicsCategoryHero | PhysicsCategoryBlock; 
    self.hero.physicsBody.contactTestBitMask = PhysicsCategoryHero | PhysicsCategoryBlock; 

    [self addChild:self.hero]; 

    NSLog(@"ADDING HERO: %f, %f", self.hero.position.x, self.hero.position.y); 
} 

- (void)didBeginContact:(SKPhysicsContact *)contact 
{ 
    if (contact.bodyA.categoryBitMask == PhysicsCategoryBlock && contact.bodyB.categoryBitMask == PhysicsCategoryHero) 
    { 
     [self.hero removeAllActions]; 
     self.hero.position = contact.bodyB.node.position; 
     NSLog(@"COLLISION: %f, %f", self.hero.position.x, self.hero.position.y); 
     self.inMotion = NO; 
    } 
    else if (contact.bodyB.categoryBitMask == PhysicsCategoryBlock && contact.bodyA.categoryBitMask == PhysicsCategoryHero) 
    { 
     [self.hero removeAllActions]; 
     self.hero.position = contact.bodyA.node.position; 
     NSLog(@"COLLISION: %f, %f", self.hero.position.x, self.hero.position.y); 
     self.inMotion = NO; 
    } 
} 


- (void) moveHeroTowardDirection:(DIRECTION_t)direction 
{ 
    CGPoint location; 

    switch (direction) 
    { 
     case UP: 
     { 
      location = CGPointMake(self.hero.position.x, self.hero.position.y + 600); 
     } 
      break; 

     case DOWN: 
     { 
      location = CGPointMake(self.hero.position.x, self.hero.position.y + -600); 
     } 
      break; 

     case LEFT: 
     { 
      location = CGPointMake(self.hero.position.x + -600, self.hero.position.y); 
     } 
      break; 

     case RIGHT: 
     { 
      location = CGPointMake(self.hero.position.x + 600, self.hero.position.y); 
     } 
      break; 

     default: return; 
    } 

    NSLog(@"MOVE POSITION: %f, %f", location.x, location.y); 

    SKAction *action = [SKAction moveTo:location duration:10]; 
    [self.hero runAction:action]; 
} 

-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    if (self.inMotion) 
     return; 

    self.inMotion = YES; 

    UITouch *touch = [touches anyObject]; 
    CGPoint touchLocation = [touch locationInView:self.view]; 
    CGPoint diff = CGPointSubtract(self.hero.position, touchLocation); 

    NSLog(@"TOUCH POSITION: %f, %f", touchLocation.x, touchLocation.y); 
    NSLog(@"HERO POSITION: %f, %f", self.hero.position.x, self.hero.position.y); 
    NSLog(@"DIFF POSITION: %f, %f", diff.x, diff.y); 

    // 
    // Magnitude to find out which direction is dominate 
    // 
    if (abs(diff.x) > abs(diff.y)) 
    { 
     if (touchLocation.x > self.hero.position.x) 
     { 
      NSLog(@"LEFT"); 
      [self moveHeroTowardDirection:LEFT]; 
     } 
     else 
     { 
      NSLog(@"RIGHT"); 
      [self moveHeroTowardDirection:RIGHT]; 
     } 
    } 
    else 
    { 
     if (touchLocation.y < self.hero.position.y) 
     { 
      NSLog(@"UP"); 
      [self moveHeroTowardDirection:UP]; 
     } 
     else 
     { 
      NSLog(@"DOWN"); 
      [self moveHeroTowardDirection:DOWN]; 
     } 
    } 
} 

@end 

Answer 1

あなたのタッチが同様

これは、HTTPを助ける

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 

for (UITouch *touch in touches) { 

    for (UITouch *touch in touches) { 

     CGPoint location = [touch locationInNode:self]; 

     CGPoint diff = CGPointMake(location.x - self.hero.position.x, location.y - self.hero.position.y); 

     CGFloat angleRadians = atan2f(diff.y, diff.x); 

     [self.hero runAction:[SKAction sequence:@[ 
                [SKAction rotateToAngle:angleRadians duration:1.0], 
                [SKAction moveByX:diff.x y:diff.y duration:3.0] 
                ]]]; 
    } 
} 
}