iOS_SpriteKit_03_精灵平移拖动
效果图:
头文件:
#import <SpriteKit/SpriteKit.h> @interface MainScene : SKScene // 添加背景 - (void)addBgImgWithName:(NSString *)imgName; // 添加人物 - (void)addBoyWithImgName:(NSString *)imgName; @end
M文件
#import "MainScene.h"
static NSString * const kAnimalNodeName = @"constant_boy";
@interface MainScene()
{
BOOL _isContentCreated;
}
@property (nonatomic, strong) SKSpriteNode *currentNode;
@end
@implementation MainScene
- (void)willMoveFromView:(SKView *)view
{
DLog(@"即将从View:%@ 移除",view);
}
// 每当视图呈现场景时，didMoveToView：方法都会被调用
- (void)didMoveToView: (SKView *) view
{
DLog(@"didMoveToView:%@",view);
if (!_isContentCreated)
{
[self initSceneContents];
_isContentCreated = YES;
}
// 给self 场景 所在的view添加平移手势
[self addPanReco];
}
- (void)addPanReco
{
UIPanGestureRecognizer *gestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGuestRecoed:)];
[[self view] addGestureRecognizer:gestureRecognizer];
}
- (void)initSceneContents
{
self.backgroundColor = [SKColor blueColor];
self.scaleMode = SKSceneScaleModeAspectFit;
[self addChild: [self newHelloNode]];
}
- (SKLabelNode *)newHelloNode
{
SKLabelNode *helloNode = [SKLabelNode labelNodeWithFontNamed:@"Chalkduster"];
helloNode.text = @"Hello, Beyond!";
// 类似于tag
helloNode.name = @"HelloBeyond";
helloNode.fontSize = 32;
helloNode.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame));
return helloNode;
}
// 根据图片名,添加背景图片精灵
- (void)abstract_addBgSpriteNodeNamed:(NSString *)imgName
{
SKSpriteNode *bgSprite = [SKSpriteNode spriteNodeWithImageNamed:imgName];
bgSprite.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame));
bgSprite.size = self.size;
[self addChild:bgSprite];
}
// 根据图片名,添加人物精灵
- (void)abstract_addBoySpriteNamed:(NSString *)imgName
{
SKSpriteNode *boy = [SKSpriteNode spriteNodeWithImageNamed:imgName];
boy.name = kAnimalNodeName;
boy.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame));
[self addChild:boy];
}
// 另一种方法添加背景
- (void)addBgImgWithName:(NSString *)imgName
{
[self abstract_addBgSpriteNodeNamed:imgName];
}
- (void)addBoyWithImgName:(NSString *)imgName
{
[self abstract_addBoySpriteNamed:imgName];
}
#pragma mark - 添加平移手势
- (void)panGuestRecoed:(UIPanGestureRecognizer *)recognizer {
if (recognizer.state == UIGestureRecognizerStateBegan) {
NSLog(@"手势开始");
CGPoint touchLocation = [recognizer locationInView:recognizer.view];
// 打印
DLog(@"sg__%@",NSStringFromCGPoint(touchLocation));
touchLocation = [self convertPointFromView:touchLocation];
// 打印
DLog(@"sg__%@",NSStringFromCGPoint(touchLocation));
// 找出点击的目标,并且_currentNode记住
[self selectNodeForTouch:touchLocation];
} else if (recognizer.state == UIGestureRecognizerStateChanged) {
NSLog(@"手势进行...");
CGPoint translation = [recognizer translationInView:recognizer.view];
// 打印
DLog(@"手势进行...sg__%@",NSStringFromCGPoint(translation));
translation = CGPointMake(translation.x, -translation.y);
[self panForTranslation:translation];
[recognizer setTranslation:CGPointZero inView:recognizer.view];
} else if (recognizer.state == UIGestureRecognizerStateEnded) {
NSLog(@"手势结束");
}
}
- (void)panForTranslation:(CGPoint)translation {
CGPoint position = [_currentNode position];
if([[_currentNode name] isEqualToString:kAnimalNodeName]) {
// 更新boy的坐标
[_currentNode setPosition:CGPointMake(position.x + translation.x, position.y + translation.y)];
}
}
// 根据位置, 选择出当前的Node
- (void)selectNodeForTouch:(CGPoint)touchLocation {
//1
SKSpriteNode *touchedNode = (SKSpriteNode *)[self nodeAtPoint:touchLocation];
//2 点了新的 Node
if(![_currentNode isEqual:touchedNode]) {
[_currentNode removeAllActions];
[_currentNode runAction:[SKAction rotateToAngle:0.0f duration:0.1]];
_currentNode = touchedNode;
//3
if([[touchedNode name] isEqualToString:kAnimalNodeName]) {
SKAction *sequence = [SKAction sequence:@[[SKAction rotateByAngle:degToRad(-4.0f) duration:0.1],
[SKAction rotateByAngle:0.0 duration:0.1],
[SKAction rotateByAngle:degToRad(4.0f) duration:0.1]]];
[_currentNode runAction:[SKAction repeatActionForever:sequence]];
}
}
}
// 选中后,摇摆
float degToRad(float degree) {
return degree / 180.0f * M_PI;
}
#pragma mark - 触屏事件
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
// 当前Node停止抖动
[_currentNode removeAllActions];
}
#pragma mark - 触摸事件
- (void)touchesBegan2:(NSSet *) touches withEvent:(UIEvent *)event
{
SKNode *helloNode = [self childNodeWithName:@"HelloBeyond"];
if (helloNode != nil)
{
// 为了防止Node 重复响应 touch事件，代码会清除节点的名称。
// To prevent the node from responding to repeated presses, the code clears the node’s name.
helloNode.name = nil;
SKAction *moveUp = [SKAction moveByX: 0 y: 100.0 duration: 0.5];
SKAction *zoom = [SKAction scaleTo: 2.0 duration: 0.25];
SKAction *pause = [SKAction waitForDuration: 0.5];
SKAction *fadeAway = [SKAction fadeOutWithDuration: 0.25];
SKAction *remove = [SKAction removeFromParent];
SKAction *moveSequence = [SKAction sequence:@[moveUp, zoom, pause, fadeAway, remove]];
// [helloNode runAction: moveSequence];
[helloNode runAction: moveSequence completion:^{
return;
// ShipScene *shipScene = [[ShipScene alloc] initWithSize:self.size];
// SKTransition *doorTransition = [SKTransition doorsOpenVerticalWithDuration:0.5];
// [self.view presentScene:shipScene transition:doorTransition];
}];
}
}
@end