UIImage 到 cocos2dx 中的 Sprite？

Question

首先我将 URL 中的图片保存在文档目录中：

NSURL *imageURL = [NSURL URLWithString:userImage];
NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage *image = [UIImage imageWithData:imageData];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"image name.png"];

[UIImagePNGRepresentation(image) writeToFile:savedImagePath atomically:YES];

然后我想在 cpp 中检索这张图片作为 Sprite：

std::string writablePath2 = CCFileUtils::getInstance()->getWritablePath();
writablePath2.append("your saved image.png");
Rect rect2 = Rect(visibleSize.width/2 - 200, visibleSize.height/2 -200 , 500, 500 );
Sprite *screen_shot = Sprite::create(writablePath2,rect2);
screen_shot->setPosition(visibleSize.width/2 ,origin.y + visibleSize.height/2 - 100);
this->addChild(screen_shot,2);

但它显示的是黑色精灵。

Answer 1

1)从文件路径创建Texture2D

2)从 Texture2D 创建 Sprite

这里是代码

std::string imagPath = CCFileUtils::getInstance()->getWritablePath();
imagPath.append("your image name.png");

Texture2D* objTexture2D = new Texture2D();
Image* image = new Image();

JpgImage->initWithImageFile(imagPath);
objTexture2D->initWithData(image->getData(),image->getDataLen(),Texture2D::PixelFormat::RGB888,image->getWidth(),image->getHeight(),Size(image->getWidth(),image->getHeight()));

Sprite *spr = Sprite::createWithTexture(objTexture2D);
spr->setPosition(origin.x + visibleSize.width/2 , visibleSize.height/2);
this->addChild(spr,2);

给你....