我正在开发一款摄影应用程序,我正在为一张图像添加 10 种效果。我为此使用了一些库。一段时间后应用程序崩溃。它显示内存警告。我正在使用压缩后的图像,但应用程序仍然崩溃。谁能告诉我如何解决这个内存警告。我正在使用以下代码进行图像压缩
-(UIImage *)resizeImage:(UIImage *)image {
int w = image.size.width;
int h = image.size.height;
CGImageRef imageRef = [image CGImage];
int width, height;
int destWidth = 640;
int destHeight = 480;
if(w > h){
width = destWidth;
height = h*destWidth/w;
} else {
height = destHeight;
width = w*destHeight/h;
}
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef bitmap;
bitmap = CGBitmapContextCreate(NULL, width, height, 8, 4 * width, colorSpace, kCGImageAlphaPremultipliedFirst);
if (image.imageOrientation == UIImageOrientationLeft) {
CGContextRotateCTM (bitmap, M_PI/2);
CGContextTranslateCTM (bitmap, 0, -height);
} else if (image.imageOrientation == UIImageOrientationRight) {
CGContextRotateCTM (bitmap, -M_PI/2);
CGContextTranslateCTM (bitmap, -width, 0);
} else if (image.imageOrientation == UIImageOrientationUp) {
} else if (image.imageOrientation == UIImageOrientationDown) {
CGContextTranslateCTM (bitmap, width,height);
CGContextRotateCTM (bitmap, -M_PI);
}
CGContextDrawImage(bitmap, CGRectMake(0, 0, width, height), imageRef);
CGImageRef ref = CGBitmapContextCreateImage(bitmap);
UIImage *result = [UIImage imageWithCGImage:ref];
CGContextRelease(bitmap);
CGImageRelease(ref);
return result;
}
我正在使用那个 GPUImage 库,并且我添加了 GPUImageView 来显示图像。如果有人有任何想法,请帮助我。提前致谢。