一種方法來檢測哪些按鈕應該被釋放

Question

我用這個問題的解決方案SpriteKit Objective-C: programming directional pad controls以及從這裏Correct way to create button in Sprite Kit?的一個版本的自定義類按鈕與省略目標行動方法來創建我的SpriteKit遊戲的虛擬控制按鈕。所以這裏是問題所在：我試圖實現的是兩組彼此無關的按鈕（例如，左側的D-pad和右側的右側的按鈕）以及能夠在相同位置使用它們的能力可以在多點觸摸的幫助下進行，就像在右側有動作按鈕和左側有Dirs的硬件控制器上一樣。所以我們來想象一下這種情況：

1）我先拿着一個方向按鈕和一個開火按鈕。然後，將我的左手指拖到方向按鈕外面，這會觸發if（node.name）的ELSE語句，它將所有按鈕的「選定」布爾設置爲NO。這不是我想要的，因爲火按鈕仍然保持着，它應該保持它的「選定」狀態，而方向按鈕 - 不應該。 2）相同的情況，但是如果我將右手指放在火按鈕外面，並保持按住方向按鈕。兩個按鈕都會被取消選中，當按下按鈕時不應該這樣做。

那麼，我該如何正確實現它，以一種方式來檢測，哪個按鈕完全取消選擇「取消選擇」只是特定的一組按鈕？請把我推向正確的方向。希望我所要求的是可能的。

當前代碼（這實在是太亂了，原諒大猩猩式編碼）：

DirectionalButton.h

#import <SpriteKit/SpriteKit.h> 
@interface DirectionalButton : SKSpriteNode 

@property (nonatomic) BOOL isEnabled; 
@property (nonatomic) BOOL isSelected; 
@property (nonatomic, readonly, strong) SKLabelNode *title; 
@property (nonatomic, readwrite, strong) SKTexture *normalTexture; 
@property (nonatomic, readwrite, strong) SKTexture *selectedTexture; 
@property (nonatomic, readwrite, strong) SKTexture *disabledTexture; 

- (instancetype)initWithTextureNormal:(SKTexture *)normal selected:(SKTexture *)selected; 

- (instancetype)initWithTextureNormal:(SKTexture *)normal selected:(SKTexture *)selected disabled:(SKTexture *)disabled; 

- (instancetype)initWithImageNamedNormal:(NSString *)normal selected:(NSString *)selected; 
- (instancetype)initWithImageNamedNormal:(NSString *)normal selected:(NSString *)selected disabled:(NSString *)disabled; 

@end 

DirectionalButton.m

#import "DirectionalButton.h" 



@implementation DirectionalButton 

#pragma mark Texture Initializer 

- (instancetype)initWithTexture:(SKTexture *)texture color:(UIColor *)color size:(CGSize)size { 
    return [self initWithTextureNormal:texture selected:nil disabled:nil]; 
} 

- (instancetype)initWithTextureNormal:(SKTexture *)normal selected:(SKTexture *)selected { 
    return [self initWithTextureNormal:normal selected:selected disabled:nil]; 
} 

- (instancetype)initWithTextureNormal:(SKTexture *)normal selected:(SKTexture *)selected disabled:(SKTexture *)disabled { 
    self = [super initWithTexture:normal color:[UIColor whiteColor] size:normal.size]; 
    if (self) { 
     [self setNormalTexture:normal]; 
     [self setSelectedTexture:selected]; 
     [self setDisabledTexture:disabled]; 
     [self setIsEnabled:YES]; 
     [self setIsSelected:NO]; 

     _title = [SKLabelNode labelNodeWithFontNamed:@"Arial"]; 
     [_title setVerticalAlignmentMode:SKLabelVerticalAlignmentModeCenter]; 
     [_title setHorizontalAlignmentMode:SKLabelHorizontalAlignmentModeCenter]; 

     [self addChild:_title]; 
     [self setUserInteractionEnabled:YES]; 
    } 
    return self; 
} 

#pragma mark Image Initializer 

- (instancetype)initWithImageNamedNormal:(NSString *)normal selected:(NSString *)selected { 
    return [self initWithImageNamedNormal:normal selected:selected disabled:nil]; 
} 

- (instancetype)initWithImageNamedNormal:(NSString *)normal selected:(NSString *)selected disabled:(NSString *)disabled { 
    SKTexture *textureNormal = nil; 
    if (normal) { 
     textureNormal = [SKTexture textureWithImageNamed:normal]; 
    } 

    SKTexture *textureSelected = nil; 
    if (selected) { 
     textureSelected = [SKTexture textureWithImageNamed:selected]; 
    } 

    SKTexture *textureDisabled = nil; 
    if (disabled) { 
     textureDisabled = [SKTexture textureWithImageNamed:disabled]; 
    } 

    return [self initWithTextureNormal:textureNormal selected:textureSelected disabled:textureDisabled]; 
} 


#pragma - 
#pragma mark Setter overrides 

- (void)setIsEnabled:(BOOL)isEnabled { 
    _isEnabled = isEnabled; 
    if ([self disabledTexture]) { 
     if (!_isEnabled) { 
      [self setTexture:_disabledTexture]; 
     } else { 
      [self setTexture:self.normalTexture]; 
     } 
    } 
} 

- (void)setIsSelected:(BOOL)isSelected { 
    _isSelected = isSelected; 
    if ([self selectedTexture] && [self isEnabled]) { 
     if (_isSelected) { 
      [self setTexture:_selectedTexture]; 
      [self runAction:[SKAction fadeAlphaTo:0.55 duration:0.12f]]; 
     } else { 
      [self setTexture:self.normalTexture]; 
      [self runAction:[SKAction fadeAlphaTo:1 duration:0.12f]]; 
     } 
    } 
} 
@end 

GameScene.m

- (void)createHUD { 
//Executed in didMoveToView 
NSString *pathToImageForLeftButtonTexture = @"buttonDirectionalLeft"; 
NSString *pathToImageForRightButtonTexture = @"buttonDirectionalRight"; 
dirBtnLeft = [[DirectionalButton alloc]initWithImageNamedNormal:pathToImageForLeftButtonTexture selected:pathToImageForLeftButtonTexture]; 
/* 
    Set size and position for left 
*/ 
dirBtnLeft.name = @"directionalLeft"; 
dirBtnRight = [[DirectionalButton alloc]initWithImageNamedNormal:pathToImageForRightButtonTexture selected:pathToImageForRightButtonTexture]; 
/* 
    Set size and position accordingly to left button for right 
*/ 
dirBtnRight.name = @"directionalRight"; 
dirBtnLeftFrame = [SKSpriteNode spriteNodeWithColor:[SKColor clearColor] size:dirBtnLeft.size]; 
dirBtnLeftFrame.position = dirBtnLeft.position; 
dirBtnRightFrame = [SKSpriteNode spriteNodeWithColor:[SKColor clearColor] size:dirBtnRight.size]; 
fireBtn = [[DirectionalButton alloc]initWithImageNamedNormal:@"default.jpg" selected:@"default.jpg"]; 
/* 
    Set position and size for fire 
*/ 
fireBtnFrame = [SKSpriteNode spriteNodeWithColor:[SKColor clearColor] size:fireBtn.size]; 
fireBtnFrame.position = fireBtn.position; 
dirBtnRightFrame.position = dirBtnRight.position; 
dirBtnLeftFrame.zPosition = 100; 
dirBtnRightFrame.zPosition = 100; 
fireBtnFrame.zPosition = 100; 
dirBtnRight.zPosition = 99; 
dirBtnLeft.zPosition = 99; 
fireBtn.zPosition = 99; 
dirBtnLeftFrame.name = @"directionalLeftFrame"; 
dirBtnRightFrame.name = @"directionalRightFrame"; 
fireBtnFrame.name = @"primaryFire"; 
[self addChild:dirBtnLeft]; 
[self addChild:dirBtnRight]; 
[self addChild:dirBtnLeftFrame]; 
[self addChild:dirBtnRightFrame]; 
[self addChild:fireBtn]; 
[self addChild:fireBtnFrame];  
} 

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    [self touchesMoved:touches withEvent:event]; 
} 

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
for(UITouch *touch in [event allTouches]){ 
    CGPoint touchLocation = [touch locationInNode:self]; 
    SKNode *node = [self nodeAtPoint:touchLocation]; 


    if (node.name) 
    { 
     if ([node.name isEqualToString:@"directionalRightFrame"]) 
     { 

      if(!dirBtnRight.isSelected){ 
      [dirBtnRight setIsSelected:YES]; 
       [dirBtnLeft setIsSelected:NO];} 
     } 
     else if ([node.name isEqualToString:@"directionalLeftFrame"]) 
     { 
      if(!dirBtnLeft.isSelected){ 
      [dirBtnRight setIsSelected:NO]; 
       [dirBtnLeft setIsSelected:YES];} 
     } 
     else if ([node.name isEqualToString:@"primaryFire"]) { 
      if (!fireBtn.isSelected) { 
       [fireBtn setIsSelected:YES]; 
      } 
     } 
    } 
    else 
    { 
     [dirBtnRight setIsSelected:NO]; 
     [dirBtnLeft setIsSelected:NO]; 
     [fireBtn setIsSelected:NO]; 
    }} 
} 

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
for (UITouch *touch in [event allTouches]) { 
    CGPoint touchPoint = [touch locationInNode:self]; 
    SKNode *node = [self nodeAtPoint:touchPoint]; 
    if(node.name){ 
    if ([node.name isEqualToString:@"directionalLeftFrame"]) { 
dirBtnLeft.isSelected = NO;} 
else if ([node.name isEqualToString:@"directionalRightFrame"]) 
{ 
    dirBtnRight.isSelected = NO; 
} 
else if([node.name isEqualToString:@"primaryFire"]){ 
    fireBtn.isSelected = NO;} 
    } else 
    { 
     dirBtnLeft.isSelected = NO; 
     dirBtnRight.isSelected = NO; 
     fireBtn.isSelected = NO;}} 
} 

-(void)update:(CFTimeInterval)currentTime { 
    if(dirBtnLeft.isSelected){ 
     //Do something 
    } 
    else if(dirBtnRight.isSelected){ 
     //Do something else 
    } 
    else 
    { 
     //Stop doing anything 
    } 
} 

Answer 1

在touchesEnded中，您正在循環SKScene中的所有活動觸摸。
[event allTouches]返回所有活動的觸摸。
而不是僅僅使用touches NSSet來循環實際結束的觸摸。

請使用下面的代碼代替touchesMoved和touchesEnded。

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    for (UITouch *touch in touches) { 
      // Your conditions 
    } 
}