编写我自己的方法 - SpriteKit答案

【问题标题】：Writing my own Methods - SpriteKit编写我自己的方法 - SpriteKit
【发布时间】：2014-02-22 14:17:40
【问题描述】：

我经常发现自己在重复代码，所以我想创建一个方法来处理它并减少大量重复。我很难理解方法，所以有人可以建议我如何创建一个自定义方法来处理 touchesBegan 方法中的重复代码。

谢谢

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

for (vLineName in vLineArray) {

    NSString *value = [vLineArray objectForKey:vLineName];
    SKAction *changeLineToDark = [SKAction setTexture:[SKTexture textureWithImageNamed:@"darkTexture.png"]];


    for (UITouch *touch in touches) {
        CGPoint touchPoint = [touch locationInNode:self];
        SKSpriteNode *box = (SKSpriteNode *)[self childNodeWithName:value];
        if (CGRectContainsPoint(box.frame, touchPoint)) {
            [box runAction:changeLineToDark];
            box.zPosition = 2;
            NSLog (@"Just Touched %@", vLineName);
        }
     }
}

for (hLineName in hLineArray) {

    NSString *value = [hLineArray objectForKey:hLineName];
    SKAction *changeLineToDark = [SKAction setTexture:[SKTexture textureWithImageNamed:@"darkTexture.png"]];


    for (UITouch *touch in touches) {
        CGPoint touchPoint = [touch locationInNode:self];
        SKSpriteNode *box = (SKSpriteNode *)[self childNodeWithName:value];
        if (CGRectContainsPoint(box.frame, touchPoint)) {
            [box runAction:changeLineToDark];
            box.zPosition = 2;
            NSLog (@"Just Touched %@", hLineName);
        }
    }
}
}

【问题讨论】：

标签： objective-c methods sprite-kit

【解决方案1】：

您可以从 touchesBegan:withEvent: 方法中提取代码，例如：

-(void)handleTouch:(NSSet *)touches
{
    for (vLineName in vLineArray) {

    NSString *value = [vLineArray objectForKey:vLineName];
    SKAction *changeLineToDark = [SKAction setTexture:[SKTexture textureWithImageNamed:@"darkTexture.png"]];


    for (UITouch *touch in touches) {
        CGPoint touchPoint = [touch locationInNode:self];
        SKSpriteNode *box = (SKSpriteNode *)[self childNodeWithName:value];
        if (CGRectContainsPoint(box.frame, touchPoint)) {
            [box runAction:changeLineToDark];
            box.zPosition = 2;
            NSLog (@"Just Touched %@", vLineName);
        }
     }
}

for (hLineName in hLineArray) {

    NSString *value = [hLineArray objectForKey:hLineName];
    SKAction *changeLineToDark = [SKAction setTexture:[SKTexture textureWithImageNamed:@"darkTexture.png"]];


    for (UITouch *touch in touches) {
        CGPoint touchPoint = [touch locationInNode:self];
        SKSpriteNode *box = (SKSpriteNode *)[self childNodeWithName:value];
        if (CGRectContainsPoint(box.frame, touchPoint)) {
            [box runAction:changeLineToDark];
            box.zPosition = 2;
            NSLog (@"Just Touched %@", hLineName);
        }
    }
}
}

并且每次触摸屏幕时都可以调用它：

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

【讨论】：