我正在使用cocos2d为iPhone编写一个应用程序，其中我有4个精灵按钮。我想我会通过使用2个精灵来实现按钮功能，这些精灵具有代表按下/未按下状态的不同.png文件。我认为这比使用动画更好。除了检测何时按下和释放按钮之外，我还需要检测何时发生双按钮组合按压/释放（如和弦）。我甚至可能将它带到3和4按钮组合。我想要实现的另一个功能是检测来自按钮内的轻弹是否来自另一个动作序列。
最佳方法是什么？我会为四个按钮使用一个边界矩形/或精灵（它们是方形的形状）还是吞下触摸？然后，我会使用较小的sprite rects来确定触摸发生了哪一个？或者我是否有单独的精灵rects进行检测，然后让他们检查是否其他按钮也被按下，然后同时释放？我会用这两种方式使用Bool状态变量吗？
通过为每个按钮精灵制作一个菜单/菜单项，我使用CCMenu和CCMenuitem完成了所有工作。然而，我无法弄清楚如何在按下并释放来自不同菜单的菜单项的同时检测来自一个菜单的菜单项是否被按下和释放。我使用了单独的菜单，因为如果我使用具有多个菜单项的相同菜单，则一次只能按下一个菜单项。我说它工作正常意味着它适用于单个和多个印刷机，但它会将多个印版视为连续两次印刷而不是同时印刷。 IE：单次按下导致运行单个动作序列（按预期），同时按下组合导致为每个按钮运行单独的按钮动作序列，就好像我已经分别按下它们一样（我希望它运行一个特定的动作序列）到那个按钮组合）。这就是为什么我认为尝试实现我自己的按钮系统而不是使用CCMenu系统可能会更好。我是否正确离开CCMenu？
对于长篇描述感到抱歉，但确实说具体。 B）
对于其他人如何实施或将如何实现这一点的任何见解将不胜感激！
答案 0 :(得分：2)
以下是我实施此操作的方法，以防其他人试图这样做。
spuButton.h（CCSprite子类）
#import <Foundation/Foundation.h>
#import "cocos2d.h"
typedef enum tagButtonState {
kButtonStatePressed,
kButtonStateNotPressed
} ButtonState;
typedef enum tagButtonStatus {
kButtonStatusEnabled,
kButtonStatusDisabled
} ButtonStatus;
@interface spuButton : CCSprite <CCTargetedTouchDelegate> {
@private
ButtonState buttonState;
CCTexture2D *buttonNormal;
CCTexture2D *buttonLit;
ButtonStatus buttonStatus;
}
@property(nonatomic, readonly) CGRect rect;
+ (id)spuButtonWithTexture:(CCTexture2D *)normalTexture;
- (void)setNormalTexture:(CCTexture2D *)normalTexture;
- (void)setLitTexture:(CCTexture2D *)litTexture;
- (BOOL)isPressed;
- (BOOL)isNotPressed;
- (void)makeDisabled;
- (void)makeEnabled;
- (BOOL)isEnabled;
- (BOOL)isDisabled;
- (void)makeLit;
- (void)makeNormal;
- (void)dealloc;
@end
spuButton.m
#import "spuButton.h"
#import "cocos2d.h"
@implementation spuButton
- (CGRect)rect {
CGSize s = [self.texture contentSize];
return CGRectMake(-s.width / 2, -s.height / 2, s.width, s.height);
}
+ (id)spuButtonWithTexture:(CCTexture2D *)normalTexture {
return [[[self alloc] initWithTexture:normalTexture] autorelease];
}
- (void)setNormalTexture:(CCTexture2D *)normalTexture {
buttonNormal = normalTexture;
}
- (void)setLitTexture:(CCTexture2D *)litTexture {
buttonLit = litTexture;
}
- (BOOL)isPressed {
if (buttonState== kButtonStateNotPressed) return NO;
if (buttonState== kButtonStatePressed) return YES;
return NO;
}
- (BOOL)isNotPressed {
if (buttonState== kButtonStateNotPressed) return YES;
if (buttonState== kButtonStatePressed) return NO;
return YES;
}
- (void)makeDisabled {
buttonStatus = kButtonStatusDisabled;
buttonState= kButtonStateNotPressed;
[self makeNormal];
}
- (void)makeEnabled {
buttonStatus = kButtonStatusEnabled;
buttonState= kButtonStateNotPressed;
[self makeNormal];
}
- (BOOL)isEnabled {
if (buttonStatus== kButtonStatusDisabled) return NO;
if (buttonStatus== kButtonStatusEnabled) return YES;
return NO;
}
- (BOOL)isDisabled {
if (buttonStatus== kButtonStatusEnabled) return NO;
if (buttonStatus== kButtonStatusDisabled) return YES;
return YES;
}
- (void)makeLit {
[self setTexture:buttonLit];
}
- (void)makeNormal {
[self setTexture:buttonNormal];
}
- (id)initWithTexture:(CCTexture2D *)aTexture {
if ((self = [super initWithTexture:aTexture]) ) {
buttonState = kButtonStateNotPressed;
buttonStatus = kButtonStatusEnabled;
}
return self;
}
- (void)onEnter {
if (buttonStatus == kButtonStatusDisabled) return;
[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:NO];
[super onEnter];
}
- (void)onExit {
if (buttonStatus == kButtonStatusDisabled) return;
[[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
[super onExit];
}
- (BOOL)containsTouchLocation:(UITouch *)touch {
return CGRectContainsPoint(self.rect, [self convertTouchToNodeSpaceAR:touch]);
}
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
if (buttonStatus == kButtonStatusDisabled) return NO;
if (buttonState== kButtonStatePressed) return NO;
if ( ![self containsTouchLocation:touch] ) return NO;
buttonState= kButtonStatePressed;
[self makeLit];
return YES;
}
- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event {
// If it weren't for the TouchDispatcher, you would need to keep a reference
// to the touch from touchBegan and check that the current touch is the same
// as that one.
// Actually, it would be even more complicated since in the Cocos dispatcher
// you get NSSets instead of 1 UITouch, so you'd need to loop through the set
// in each touchXXX method.
if (buttonStatus == kButtonStatusDisabled) return;
if ([self containsTouchLocation:touch]) return;
buttonState= kButtonStateNotPressed;
[self makeNormal];
}
- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event {
if (buttonStatus == kButtonStatusDisabled) return;
buttonState= kButtonStateNotPressed;
[self makeNormal];
}
- (void)dealloc {
[buttonNormal release];
[buttonLit release];
[super dealloc];
}
@end
HelloWorldScene.m（只是我的tick：方法，以防止我的其他功能混淆示例）
-(void)tick:(ccTime)dt {
if ([[_otherControlsArray objectAtIndex:0] wasPressed]) {
[[_otherControlsArray objectAtIndex:0] setWasPressed:NO];
[self removeChild:[_otherControlsArray objectAtIndex:0] cleanup:YES];
[self addChild:[_otherControlsArray objectAtIndex:1]];
NSLog(@"Play");
_gameHasNotBeenPlayedYet = NO;
Snarfle_s_PowerUPAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[delegate makeNotPaused];
[self gameLogic];
}
if (_gameHasNotBeenPlayedYet) {
return;
}
if (_buttonsPressedAndReleased > 0) { //respond to button(s) released and reset
NSLog(@"Buttons Pressed and Released-->%d",_buttonsPressedAndReleased);
if ([self checkButtons:_buttonsPressedAndReleased]);
_buttonsPressed = 0;
_buttonsPressedAndReleased = 0;
return;
}
if (_buttonsPressed <= 4) { // two buttons have not already been pressed
for (spuButton *aButton in _fourButtonsArray) {
if ([aButton isNotPressed]) continue; //this button is not pressed
if (_buttonsPressed == 0) { //this button is pressed and no other buttons have been pressed
_buttonsPressed = aButton.tag;
continue;
}
//this button is pressed while another has been pressed
//figure out which two buttons have been pressed
if (_buttonsPressed == 1) { //red plus another
switch (aButton.tag) {
case 2: //blue
_buttonsPressed = 5;
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
break;
case 3: //green
_buttonsPressed = 6;
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
break;
case 4: //yellow
_buttonsPressed = 7;
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
break;
default:
_buttonsPressed = 1;
break;
}
}
if (_buttonsPressed == 2) { //blue plus another
switch (aButton.tag) {
case 1: //red
_buttonsPressed = 5;
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
break;
case 3: //green
_buttonsPressed = 8;
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
break;
case 4: //yellow
_buttonsPressed = 9;
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
break;
default:
_buttonsPressed = 2;
break;
}
}
if (_buttonsPressed == 3) { //green plus another
switch (aButton.tag) {
case 1: //red
_buttonsPressed = 6;
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
break;
case 2: //blue
_buttonsPressed = 8;
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
break;
case 4: //yellow
_buttonsPressed = 10;
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
break;
default:
_buttonsPressed = 3;
break;
}
}
if (_buttonsPressed == 4) { //yellow plus another
switch (aButton.tag) {
case 1: //red
_buttonsPressed = 7;
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
break;
case 2: //blue
_buttonsPressed = 9;
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
break;
case 3: //green
_buttonsPressed = 10;
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
break;
default:
_buttonsPressed = 4;
break;
}
}
if (_buttonsPressed > 4) break; //more than one has been pressed and identified
}
}
//now we know what buttons have been pressed now check to see if they have been released
//if more than one has been pressed disable the other two
//also if more than one has been pressed and one of them gets released disable the released one but keep it lit
switch (_buttonsPressed) {
case 1: //red
if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) _buttonsPressedAndReleased = 1;
break;
case 2: //blue
if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) _buttonsPressedAndReleased = 2;
break;
case 3: //green
if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) _buttonsPressedAndReleased = 3;
break;
case 4: //yellow
if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) _buttonsPressedAndReleased = 4;
break;
case 5: //red & blue
if (([[_fourButtonsArray objectAtIndex:0] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:1] isNotPressed])) _buttonsPressedAndReleased = 5;
else {
if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:0] makeLit];
}
if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:1] makeLit];
}
}
break;
case 6: //red & green
if (([[_fourButtonsArray objectAtIndex:0] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:2] isNotPressed])) _buttonsPressedAndReleased = 6;
else {
if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:0] makeLit];
}
if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeLit];
}
}
break;
case 7: //red & yellow
if (([[_fourButtonsArray objectAtIndex:0] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:3] isNotPressed])) _buttonsPressedAndReleased = 7;
else {
if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:0] makeDisabled];
[[_fourButtonsArray objectAtIndex:0] makeLit];
}
if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeLit];
}
}
break;
case 8: //blue & green
if (([[_fourButtonsArray objectAtIndex:1] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:2] isNotPressed])) _buttonsPressedAndReleased = 8;
else {
if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:1] makeLit];
}
if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeLit];
}
}
break;
case 9: //blue & yellow
if (([[_fourButtonsArray objectAtIndex:1] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:3] isNotPressed])) _buttonsPressedAndReleased = 9;
else {
if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:1] makeDisabled];
[[_fourButtonsArray objectAtIndex:1] makeLit];
}
if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeLit];
}
}
break;
case 10: //green & yellow
if (([[_fourButtonsArray objectAtIndex:2] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:3] isNotPressed])) _buttonsPressedAndReleased = 10;
else {
if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:2] makeDisabled];
[[_fourButtonsArray objectAtIndex:2] makeLit];
}
if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) {
[[_fourButtonsArray objectAtIndex:3] makeDisabled];
[[_fourButtonsArray objectAtIndex:3] makeLit];
}
}
break;
default:
_buttonsPressedAndReleased = 0;
break;
}
}