拍照后我试图剪切图像。这在Non-Retina设备上工作正常。但在Retina设备上收到内存警告。我认为在我评论时切割图像时存在一些内存泄漏,没有问题。
代码:
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
CGSize imageSize = image.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
CGFloat newDimension = 2360;
CGFloat widthOffset = 20 * [[UIScreen mainScreen] scale];
CGFloat heightOffset = 135 * [[UIScreen mainScreen] scale];
UIGraphicsBeginImageContextWithOptions(CGSizeMake(newDimension, newDimension), NO, 0.);
[image drawAtPoint:CGPointMake(-widthOffset, -heightOffset)
blendMode:kCGBlendModeCopy
alpha:1.];
productImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self dismissViewControllerAnimated:NO completion:nil];
...
}
拍照后第一次,我得到了记忆警告,但没有坠毁。当我尝试重新打开相机时,应用程序崩溃了。有人可以帮帮我吗?感谢
答案 0 :(得分:0)
@autoreleasepool {
...
productImage = UIGraphicsGetImageFromCurrentImageContext();
...
}
autoreleasepool可能有所帮助。 UIGraphicsGetImageFromCurrentImageContext返回自动释放的UIImage对象,它会保持一段时间,直到退出autoreleasepool块或主线程上的runloop结束。代码的哪一部分应该被autoreleasepool包围,这取决于你的代码。