cocos2d中實現觸摸按鈕換圖效果方案

主要原理是當TouchBegan時根據按鈕下的坐標把對應按鈕換成按下的效果圖，當TouchMoved時根據移動previousLocationInView坐標取消對應按鈕的按下效果圖，即把按鈕還原成未按下的圖，當TouchEnded時根據抬手的坐標取消對應按鈕的按下效果圖，也即把按鈕還原成未按下的圖，直接上代碼：

1. -(id) init
2. {
3. // always call "super" init
4. // Apple recommends to re-assign "self" with the "super" return value
5. if( (self=[super init])) {
7. [self show];
9. self.isTouchEnabled=YES;
10. }
11. return self;
12. }
14. -(void) show
15. {
16. CGSize s = [[CCDirector sharedDirector] winSize];
18. //觸摸數組，用於存放要檢測觸摸的精靈
19. movableSprites = [[NSMutableArray alloc] init];
21. [[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"MineButton.plist"];
22. //根據一個plist文件名構建CCSpriteFrame對象並添加到內存池中，就是加載要用到的各種圖片
24. //背景圖
25. CCSprite *bg = [CCSprite spriteWithFile:@"bg.png"];
26. bg.position=ccp(s.width/2,s.height/2);
27. [self addChild:bg z:-1 tag:99];
29. //levelBt等級按鈕
30. levelBt=[CCSprite spriteWithSpriteFrameName:@"btnLevel.png"];
31. levelBt.position=ccp(170,levelBt.contentSize.height/2+50);
32. [self addChild:levelBt z:1 tag:103];
33. [movableSprites addObject:levelBt];
35. //scoreBt按鈕
36. scoreBt=[CCSprite spriteWithSpriteFrameName:@"btnScore.png"];
37. scoreBt.position=ccp(230,scoreBt.contentSize.height/2+50);
38. [self addChild:scoreBt z:1 tag:104];
39. [movableSprites addObject:scoreBt];
41. //moreBt按鈕
42. moreBt=[CCSprite spriteWithSpriteFrameName:@"btnMore.png"];
43. moreBt.position=ccp(290,moreBt.contentSize.height/2+50);
44. [self addChild:moreBt z:1 tag:105];
45. [movableSprites addObject:moreBt];
47. }
49. ////////////////////////////////////////////////////////
51. #pragma mark Touch Method
52. //更換觸摸協議
53. -(void) registerWithTouchDispatcher
54. {
55. [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:-1 swallowsTouches:YES];
56. //priority參數越小優先級越高
57. }
59. -(BOOL) ccTouchBegan:(UITouch*)touch withEvent:(UIEvent *)event
60. {
61. BOOL hasTouched = NO;
62. CGPoint touchlocation = [touch locationInView: [touch view]];
63. touchlocation =[[CCDirector sharedDirector] convertToGL:touchlocation];
65. CCSprite * newSprite = nil;
66. if (newSprite == nil) {
67. for (CCSprite *sprite in movableSprites) {
68. if (CGRectContainsPoint(sprite.boundingBox, touchlocation)) {
69. newSprite = sprite;
70. break;
71. }
72. }
74. }
75. int na = [newSprite tag];
76. switch (na) {
77. case 103:
78. CCLOG(@"levelBt");
79. //換按下的效果圖
80. [GameHelper changeImageBtn:newSprite imagePath:@"btnLeveled.png"];
81. hasTouched = YES;
82. break;
83. case 104:
84. CCLOG(@"scoreBt");
85. //換按下的效果圖
86. [GameHelper changeImageBtn:newSprite imagePath:@"btnScoreed.png"];
87. hasTouched = YES;
88. break;
89. case 105:
90. CCLOG(@"moreBt");
91. //換按下的效果圖
92. [GameHelper changeImageBtn:newSprite imagePath:@"btnMoreed.png"];
93. hasTouched = YES;
94. break;
95. default:
96. hasTouched = NO;
97. break;
98. }
99. if (hasTouched==YES) {
100. CCLOG(@"吞並觸摸事件");
101. //按中本層的按鈕
102. return YES;
103. }
104. else
105. {
106. CCLOG(@"傳遞觸摸事件");
107. //未按中本層的按鈕
108. return NO;
109. }
111. }
113. -(void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event{
115. //獲取舊的坐標，即按下時的坐標，移動了就表示取消對應按鈕的動作，那麼就要還原按鈕原圖
116. CGPoint oldTouchLocation=[touch previousLocationInView:touch.view];
117. oldTouchLocation=[[CCDirector sharedDirector] convertToGL:oldTouchLocation];
119. CCSprite * newSprite = nil;
120. if (newSprite == nil) {
121. for (CCSprite *sprite in movableSprites) {
122. if (CGRectContainsPoint(sprite.boundingBox, oldTouchLocation)) {
123. newSprite = sprite;
124. break;
125. }
126. }
128. }
129. int na = [newSprite tag];
130. switch (na) {
131. case 103:
132. CCLOG(@"levelBt");
133. //換未按下的效果圖
134. [GameHelper changeImageBtn:newSprite imagePath:@"btnLevel.png"];
135. break;
136. case 104:
137. CCLOG(@"scoreBt");
138. //換未按下的效果圖
139. [GameHelper changeImageBtn:newSprite imagePath:@"btnScore.png"];
140. break;
141. case 105:
142. CCLOG(@"moreBt");
143. //換未按下的效果圖
144. [GameHelper changeImageBtn:newSprite imagePath:@"btnMore.png"];
145. break;
146. default:
147. break;
148. }
150. }
152. -(void) ccTouchEnded:(UITouch*)touch withEvent:(UIEvent *)event
153. {
154. CGPoint touchlocation = [touch locationInView: [touch view]];
155. touchlocation =[[CCDirector sharedDirector] convertToGL:touchlocation];
157. CCSprite * newSprite = nil;
158. if (newSprite == nil) {
159. for (CCSprite *sprite in movableSprites) {
160. if (CGRectContainsPoint(sprite.boundingBox, touchlocation)) {
161. newSprite = sprite;
162. break;
163. }
164. }
166. }
167. int na = [newSprite tag];
168. switch (na) {
169. case 103:
170. CCLOG(@"levelBt");
171. //換按下的效果圖
172. [GameHelper changeImageBtn:newSprite imagePath:@"btnLevel.png"];
173. //執行按鈕觸發的函數
174. [self showSelectLevelLayer];
175. break;
176. case 104:
177. CCLOG(@"scoreBt");
178. //換按下的效果圖
179. [GameHelper changeImageBtn:newSprite imagePath:@"btnScore.png"];
180. //執行按鈕觸發的函數
181. [self showScoreLayer];
182. break;
183. case 105:
184. CCLOG(@"moreBt");
185. //換按下的效果圖
186. [GameHelper changeImageBtn:newSprite imagePath:@"btnMore.png"];
187. //執行按鈕觸發的函數
188. [self showMoreLayer];
189. break;
190. default:
191. break;
192. }
194. }
196. ///////////////////////////////////////////////////////////
197. -(void)showSelectLevelLayer
198. {
200. }
202. -(void)showScoreLayer
203. {
205. }
207. -(void)showMoreLayer
208. {
210. }
212. ///////////////////////////////////////////////////////////