我正在尝试从我的自定义类 SKNode 对象中获取值。问题是当我触摸物体时，不管我触摸的是什么物体，都会给我相同的值。 (蓝色按钮)而且我无法获取我之前设置的 buttonID、buttonType。

一切正常，除非我需要获取我触摸或拖过的对象的 buttonType、buttonID。

我不确定我哪里出错了，任何帮助或插入正确的方向都会很棒。谢谢。

这是我的自定义类 .h 文件。

 #import <SpriteKit/SpriteKit.h>

  @interface ButtonNode : SKNode {

          SKNode *buttonCustom;

  }

  @property int buttonType, buttonColumn, buttonID, xPos, yPos;

  @property NSString *buttonName;

   -(id)initWithButtonType:(int)buttonType;


  @end

这是我的自定义类 .m 文件

#import "ButtonNode.h"


 #define kBoxSize CGSizeMake(40, 40)


 @implementation ButtonNode

 @synthesize buttonColumn,buttonType,buttonID,xPos,yPos,buttonName;


 static const uint32_t blueCategory = 1 << 0;
 static const uint32_t redCategory = 1 << 1;
 static const uint32_t greenCategory = 1 << 2;
 static const uint32_t yellowCategory = 1 << 3;


-(id)initWithButtonType:(int)buttonType {
     self = [super init];

     if (buttonType == 1) {
        NSLog(@"BLUE BUTTON CREATE");
         [self addButtonBlue];
     }
    if (buttonType == 2) {
       NSLog(@"RED BUTTON CREATE");
        [self addButtonRed];
    }
   if (buttonType == 3) {
      NSLog(@"Green BUTTON CREATE");
       [self addButtonGreen];
   }
   if (buttonType == 4) {
     NSLog(@"Yellow BUTTON CREATE");
      [self addButtonYellow];
   }
     return self;
 }

- (void) addButtonBlue {

    SKSpriteNode *rect;

       //button type 1
        rect = [SKSpriteNode spriteNodeWithColor:[UIColor blueColor] size:kBoxSize];

        int tmpInt = [[NSDate date] timeIntervalSince1970];
        NSString *tmpName = [NSString stringWithFormat:@"%i", tmpInt];
        rect.name = tmpName; //unique name.

       rect.name = @"1";

       rect.physicsBody.categoryBitMask = blueCategory;
       rect.physicsBody.contactTestBitMask = blueCategory;
       rect.physicsBody.collisionBitMask = blueCategory | redCategory | yellowCategory | greenCategory;

        rect.position = CGPointMake(xPos , yPos );
       [self addChild:rect];
}

- (void) addButtonRed {

    SKSpriteNode *rect;

   //button type 2
   rect = [SKSpriteNode spriteNodeWithColor:[UIColor redColor] size:kBoxSize];

   int tmpInt = [[NSDate date] timeIntervalSince1970];
   NSString *tmpName = [NSString stringWithFormat:@"%i", tmpInt];
   rect.name = tmpName; //unique name.

   rect.name = @"2";

    rect.physicsBody.categoryBitMask = redCategory;
    rect.physicsBody.contactTestBitMask = redCategory;
    rect.physicsBody.collisionBitMask = blueCategory | redCategory | yellowCategory | greenCategory;

   rect.position = CGPointMake(xPos , yPos );
    [self addChild:rect];
}

- (void) addButtonGreen {

    SKSpriteNode *rect;

    //button type 3
    rect = [SKSpriteNode spriteNodeWithColor:[UIColor greenColor] size:kBoxSize];

    int tmpInt = [[NSDate date] timeIntervalSince1970];
    NSString *tmpName = [NSString stringWithFormat:@"%i", tmpInt];

   rect.name = tmpName; //unique name.

   rect.name = @"3";

   rect.physicsBody.categoryBitMask = greenCategory;
   rect.physicsBody.contactTestBitMask = greenCategory;
   rect.physicsBody.collisionBitMask = blueCategory | redCategory | yellowCategory | greenCategory;

   rect.position = CGPointMake(xPos , yPos );
   [self addChild:rect];
}

- (void) addButtonYellow {

   SKSpriteNode *rect;

   //button type 4
   rect = [SKSpriteNode spriteNodeWithColor:[UIColor yellowColor] size:kBoxSize];

   int tmpInt = [[NSDate date] timeIntervalSince1970];
   NSString *tmpName = [NSString stringWithFormat:@"%i", tmpInt];

   rect.name = tmpName; //unique name.

   rect.name = @"4";

   rect.physicsBody.mass = 1;
   rect.physicsBody.categoryBitMask = yellowCategory;
   rect.physicsBody.contactTestBitMask = yellowCategory;
   rect.physicsBody.collisionBitMask = blueCategory | redCategory | yellowCategory | greenCategory;

   rect.position = CGPointMake(xPos , yPos );
   [self addChild:rect];
}

@end

这是我创建按钮的地方。 (在文件顶部与全局 ivar 的其余部分) 按钮节点 * newButton;

    for (int i = 1; i <= 6; i++) {

    //create random Int
    int tmpInt = arc4random() %3;

    NSLog(@"tmp %i" ,tmpInt);

    column1.position = CGPointMake(100, self.frame.size.height - 40);

    if (tmpInt == 0) {
        //button type 1
        newButton = [[ButtonNode alloc] initWithButtonType:1];
        newButton.xPos = column1.position.x;
        newButton.yPos = column1.position.y *i;
        newButton.buttonID = 344224351; //unique name
        newButton.buttonColumn = 2;
        newButton.buttonType = 1;
        [column1 addChild:newButton];
        blueTotal++;
        totalButtons++;
        column1Total++;
}
    if (tmpInt == 1) {
        //button type 2
        newButton = [[ButtonNode alloc] initWithButtonType:2];
        newButton.xPos = column1.position.x;
        newButton.yPos = column1.position.y *i;
        newButton.buttonID = 344224351; //unique name
        newButton.buttonColumn = 2;
        newButton.buttonType = 1;
        [column1 addChild:newButton];
        redTotal++;
        totalButtons++;
        column1Total++;
    }

 }

这是工作不正常的部分。

     - (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    for (UITouch *touch in touches) {

       UITouch* touch = [touches anyObject];
       CGPoint loc = [touch locationInNode:self];
       NSArray *nodes = [self nodesAtPoint:loc];

       for (SKNode *nod in nodes) {

          NSString *tmp = nod.name;
             if (tmp.length !=0) {

                NSString * tmpType = nod.name;

               if ([tmpType isEqualToString:@"1"]) {
                    NSLog(@"Node Type: %@", nod.name);
                    previousButton = @"1";
                    NSLog (@"%d",newButton.buttonType);
               }

               if ([tmpType isEqualToString:@"2"]) {
                   NSLog(@"Node Type: %@", nod.name);
                   previousButton = @"2";
                   NSLog (@"%d",newButton.buttonType);
               }

              if ([tmpType isEqualToString:@"3"]) {
                NSLog(@"Node Type: %@", nod.name);
                 previousButton = @"3";
                  NSLog (@"%d",newButton.buttonType);

            }

            if ([tmpType isEqualToString:@"4"]) {
                NSLog(@"Node Type: %@", nod.name);
                previousButton = @"4";
                NSLog (@"%d",newButton.buttonType);

            }

           }
       }
    }
}

最佳答案

SKNode 没有这些属性。

在你的 for 循环中试试这个:

ButtonNode *myButton = (ButtonNode *)nod;

这会将 nod 正确地转换为 ButtonNode，您可以像这样使用 myButton :

NSLog(@"%d",myButton.buttonType);

然后您应该能够访问您在 ButtonNode 类中定义的属性。

如果您确定它是一个 ButtonNode，您可能只想执行该转换，但只是想帮助您理解为什么这些属性在您当前的代码中永远无法访问。

此外，您在 touchesBegan 的那个循环中使用 newButton 并不是我认为您“认为”的那样。这将是最后创建的按钮，而不是循环中存储在 nod 中的当前节点。

关于ios - Sprite Kit - 无法从对象获取自定义类数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23506357/