小编Joe*_*oel的帖子

我正在获得一个VOIP套接字,以便在iOS应用程序中在后台运行.

我的连接工作正常,但当我的应用程序进入后台时它不会被唤醒.但是,如果我重新打开应用程序,它会响应它在睡眠时收到的任何消息.

我像这样设置我的流:

CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault,
                                   (CFStringRef) @"test.iusealocaltestserver.com",
                                   5060,
                                   &myReadStream,
                                   &myWriteStream);
CFReadStreamSetProperty (    myReadStream,
                             kCFStreamNetworkServiceType,
                             kCFStreamNetworkServiceTypeVoIP
                             );

CFSocketNativeHandle native;
CFDataRef nativeProp = CFReadStreamCopyProperty(myReadStream, kCFStreamPropertySocketNativeHandle);

CFDataGetBytes(nativeProp, CFRangeMake(0, CFDataGetLength(nativeProp)), (UInt8 *)&native);
CFRelease(nativeProp);

CFSocketRef theSocket = CFSocketCreateWithNative(kCFAllocatorDefault, native, 0, NULL, NULL);

CFSocketGetContext(theSocket,&theContext);    


CFOptionFlags readStreamEvents = kCFStreamEventHasBytesAvailable | 
kCFStreamEventErrorOccurred     |
kCFStreamEventEndEncountered    |
kCFStreamEventOpenCompleted;

CFReadStreamSetClient(myReadStream,
                           readStreamEvents,
                           (CFReadStreamClientCallBack)&MyCFReadStreamCallback,
                      (CFStreamClientContext *)(&theContext));

CFReadStreamScheduleWithRunLoop(myReadStream, CFRunLoopGetCurrent(),
                                kCFRunLoopCommonModes);

然后我的回调设置如下:

static void MyCFReadStreamCallback(CFReadStreamRef stream, CFStreamEventType type, void *pInfo);

static void MyCFReadStreamCallback (CFReadStreamRef stream, CFStreamEventType type, void *pInfo)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; …

我有一个在画布上运行的javascript应用程序.它适用于Android,除了当你用手指在屏幕上拖动时整个网页冻结.有没有办法阻止这种情况发生？

我有一个画布,我正在绘制一个JavaScript游戏.问题是,当玩家移动鼠标时,他们最终选择看起来很丑的画布的一半时间.

我试过谷歌搜索并使用一些CSS,如-webkit-user-select:none; 和变体,但似乎没有任何东西适用于画布.