问题描述
我最近从使用NSTimer切换到CVDisplayLink重新绘制我的OpenGL动画,但我有一个小问题,使其工作与ARC打开:
/ *
*这是渲染器输出回调函数。
* /
static CVReturn displayLinkCallback(CVDisplayLinkRef displayLink,const CVTimeStamp * now,const CVTimeStamp * outputTime,CVOptionFlags flagsIn,CVOptionFlags * flagsOut,void * displayLinkContext)
{
// now是渲染场景的时间
[((__bridge BDOpenGLView *)displayLinkContext)setNeedsDisplay:YES];
//总是成功,因为我们实际上不做任何事情
return kCVReturnSuccess;
}
显示链接回调函数必须用C语言编写,
的参数
//设置渲染器输出回调函数
CVDisplayLinkSetOutputCallback(displayLink,& displayLinkCallback, *)自);
所以我不能使用 self
在回调中,但是使用((__ bridge BDOpenGLView *)displayLinkContext)
产生内存泄漏:
objc [29390]:NSConcreteMapTable类的对象0x1001b01f0自动释放,没有池 - 正好泄露 - 在objc_autoreleaseNoPool()上断开以调试
我读到,我必须设置一个 NSAutoreleasePool
自己,但我不能与ARC打开。 p>
我错过了什么?
code> @autoreleasepool 封锁:
@autoreleasepool {
// c回调代码here
}
I recently switched from using NSTimer to CVDisplayLink to redraw my OpenGL animation, but i've got a little problem making it work with ARC switched on:
/*
* This is the renderer output callback function.
*/
static CVReturn displayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeStamp* now, const CVTimeStamp* outputTime, CVOptionFlags flagsIn, CVOptionFlags* flagsOut, void* displayLinkContext)
{
// now is the time to render the scene
[((__bridge BDOpenGLView*)displayLinkContext) setNeedsDisplay:YES];
// always succeeds, because we don't actually do anything here anyway
return kCVReturnSuccess;
}
The display link callback function has to be written in C, to be used as a parameter for
// set the renderer output callback function
CVDisplayLinkSetOutputCallback(displayLink, &displayLinkCallback, (__bridge void*)self);
So i can't use self
within in the callback, but using ((__bridge BDOpenGLView*) displayLinkContext)
produces a memory leak:
objc[29390]: Object 0x1001b01f0 of class NSConcreteMapTable autoreleased with no pool in place - just leaking - break on objc_autoreleaseNoPool() to debug
I read, that i have to set up an NSAutoreleasePool
myself, but i can't with ARC switched on.
Am i missing something?
Surround the code with the new @autoreleasepool
block:
@autoreleasepool {
// your c callback code here
}
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