在之前，筆者寫過一編博客，通過lua在加載場景加載spineAnimation動畫精靈，保存在table中，然后在游戲中創建動畫精靈時，提取加載好的spineAnimaiton中的

spSkeletonData來創建spineAnimation,但后來筆者發現重復創建spineAnimation時，全部相同spSkeletonData會重用同一個spSkeletonData,以下是spSkeletonData拷貝方法的源代碼：

spSkeleton* spSkeleton_create (spSkeletonData* data) {

int i, ii;

?

_spSkeleton* internal = NEW(_spSkeleton);

spSkeleton* self = SUPER(internal);

CONST_CAST(spSkeletonData*, self->data) = data;

?

self->bonesCount = self->data->bonesCount;

self->bones = MALLOC(spBone*, self->bonesCount);

?

for (i = 0; i < self->bonesCount; ++i) {

spBoneData* boneData = self->data->bones[i];

spBone* parent = 0;

if (boneData->parent) {

/* Find parent bone. */

for (ii = 0; ii < self->bonesCount; ++ii) {

if (data->bones[ii] == boneData->parent) {

parent = self->bones[ii];

break;

}

}

}

self->bones[i] = spBone_create(boneData, self, parent);

}

CONST_CAST(spBone*, self->root) = self->bones[0];

?

self->slotsCount = data->slotsCount;

self->slots = MALLOC(spSlot*, self->slotsCount);

for (i = 0; i < self->slotsCount; ++i) {

spSlotData *slotData = data->slots[i];

?

/* Find bone for the slotData's boneData. */

spBone* bone = 0;

for (ii = 0; ii < self->bonesCount; ++ii) {

if (data->bones[ii] == slotData->boneData) {

bone = self->bones[ii];

break;

}

}

self->slots[i] = spSlot_create(slotData, bone);

}

?

self->drawOrder = MALLOC(spSlot*, self->slotsCount);

memcpy(self->drawOrder, self->slots, sizeof(spSlot*) * self->slotsCount);

?

self->r = 1;

self->g = 1;

self->b = 1;

self->a = 1;

?

self->ikConstraintsCount = data->ikConstraintsCount;

self->ikConstraints = MALLOC(spIkConstraint*, self->ikConstraintsCount);

for (i = 0; i < self->data->ikConstraintsCount; ++i)

self->ikConstraints[i] = spIkConstraint_create(self->data->ikConstraints[i], self);

?

spSkeleton_updateCache(self);

?

return self;

}

?

在拷貝當中，骨骼數據確實新開辟一個內存，拷貝了一份新的spSkeletonData，但是，由于spSkeletonData屬于在table中保存的SkeletonAnimation中，受到SkeletonAnimation的影響，所以不能使用SkeletonAnimation中的spSkeletonData去創建另外一個SkeletonAnimation。

?

筆者也試過從lua中創建spSkeletonData數據，保存在table中，然后在游戲中傳遞spSkeletonData去創建SkeletonAnimation，

但在切換場景過程中，spSkeletonData會被釋放掉，所以不能被復用。

?

后來筆者從c＋＋入手，將spSkeletonData保存在c＋＋靜態的字典中，通過鍵值提取spSkeletonData去創建SkeletonAnimation，避免釋放問題。

以下是實現方法：

//SpineAnimation_new.h

#include <stdio.h>

#include "cocos/editor-support/spine/SkeletonAnimation.h"

#include "cocos/editor-support/spine/spine.h"

#include "spine/SkeletonRenderer.h"

#include "cocos2d.h"

?

using namespace spine;

using namespace std;

?

class SpineAnimation_new:spine::SkeletonAnimation

{

public:

? ? static SpineAnimation_new *createWithSkeletonData(spSkeletonData* skeletonData);

? ? static SpineAnimation_new *createWithKey(const std::string& key);

?? ?

? ? virtual ~SpineAnimation_new();

? ? spAnimationState* getState() {return SkeletonAnimation::getState();}

?? ?

?? ?

? ? spSkeletonData* getSkeletonData()

? ? {

? ? ? ? spSkeletonData*skData =SkeletonRenderer::getSkeleton()->data;

? ? ? ? return skData;

? ? }

?? ?

? ? static spSkeletonData*loadSkeletonData(const std::string& atlasFile,const std::string& jsonFile,const std::string& key);

? ? static map<const std::string,spSkeletonData*> skeletonDataMap;

? ? static void clear();

private:

? ? SpineAnimation_new(spSkeletonData*skeletonData);

? ? SpineAnimation_new(const std::string& skeletonDataFile, const std::string& atlasFile, float scale = 1);

};

?

#endif?

?

//SpineAnimation_new.cpp

?

?

#include "SpineAnimation_new.h"

#include "cocos2d.h"

#include "cocos/scripting/lua-bindings/manual/cocos2d/LuaScriptHandlerMgr.h"

#include "CCLuaStack.h"

#include "CCLuaEngine.h"

?

USING_NS_CC;

?

map<const std::string,spSkeletonData*> SpineAnimation_new::skeletonDataMap;

SpineAnimation_new *SpineAnimation_new::createWithSkeletonData(spSkeletonData* skeletonData)

{

? ? SpineAnimation_new* node = new (std::nothrow)SpineAnimation_new(skeletonData);

? ? node->autorelease();

? ? return node;

}

?

?

spSkeletonData*SpineAnimation_new::loadSkeletonData(const std::string& atlasFile,const std::string& jsonFile,const std::string& key)

{

? ? spAtlas* atlas = spAtlas_createFromFile(atlasFile.c_str(), 0);

? ? spSkeletonJson* json = spSkeletonJson_create(atlas);

? ? json->scale = 1;

? ? spSkeletonData* sd = spSkeletonJson_readSkeletonDataFile(json, jsonFile.c_str());

? ? SpineAnimation_new::skeletonDataMap.insert(pair<const std::string,spSkeletonData*>(key,sd));

? ? return sd;

}

?

SpineAnimation_new *SpineAnimation_new::createWithKey(const std::string& key)

{

? ? map<const std::string,spSkeletonData*>::iterator iter = SpineAnimation_new::skeletonDataMap.find(key);

? ? spSkeletonData* sd = iter->second;

? ? SpineAnimation_new*sa = createWithSkeletonData(sd);

? ? return sa;

}

?

?

SpineAnimation_new::~SpineAnimation_new()

{

? ? ScriptHandlerMgr::getInstance()->removeObjectAllHandlers((void*)this);

}

?

SpineAnimation_new::SpineAnimation_new(spSkeletonData*skeletonData):

SkeletonAnimation(skeletonData)

{

?? ?

}

SpineAnimation_new::SpineAnimation_new(const std::string& skeletonDataFile, const std::string& atlasFile, float scale):SkeletonAnimation(skeletonDataFile,atlasFile,scale)

{

}

?

void SpineAnimation_new::clear()

{

? ? SpineAnimation_new::skeletonDataMap.clear();

}

?

（轉載時請注明出處，from 博客園:HemJohn）

轉載于:https://www.cnblogs.com/HemJohn/p/4815998.html

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