这个是ios11 之后有关访问UI的属性的方法都不能在支线程中访问, 改一下就可以了
- (void)recalculateViewGeometry;
{
dispatch_async(dispatch_get_main_queue(), ^{
CGSize currentViewSize = self.bounds.size;
runSynchronouslyOnVideoProcessingQueue(^{
CGFloat heightScaling, widthScaling;
// CGFloat imageAspectRatio = inputImageSize.width / inputImageSize.height;
// CGFloat viewAspectRatio = currentViewSize.width / currentViewSize.height;
CGRect insetRect = AVMakeRectWithAspectRatioInsideRect(inputImageSize, self.bounds);
switch(_fillMode)
{
case kGPUImageFillModeStretch:
{
widthScaling = 1.0;
heightScaling = 1.0;
}; break;
case kGPUImageFillModePreserveAspectRatio:
{
widthScaling = insetRect.size.width / currentViewSize.width;
heightScaling = insetRect.size.height / currentViewSize.height;
}; break;
case kGPUImageFillModePreserveAspectRatioAndFill:
{
// CGFloat widthHolder = insetRect.size.width / currentViewSize.width;
widthScaling = currentViewSize.height / insetRect.size.height;
heightScaling = currentViewSize.width / insetRect.size.width;
}; break;
}
imageVertices[0] = -widthScaling;
imageVertices[1] = -heightScaling;
imageVertices[2] = widthScaling;
imageVertices[3] = -heightScaling;
imageVertices[4] = -widthScaling;
imageVertices[5] = heightScaling;
imageVertices[6] = widthScaling;
imageVertices[7] = heightScaling;
});
});
// static const GLfloat imageVertices[] = {
// -1.0f, -1.0f,
// 1.0f, -1.0f,
// -1.0f, 1.0f,
// 1.0f, 1.0f,
// };
}