主线程 RunLoop 学习笔记
以下为主RunLoop 的输出,能够看到不同的source0,source1,observer
----------------------------------
CFRunLoop{wakeup port =, stopped = false, ignoreWakeUps = false,
current mode = kCFRunLoopDefaultMode,
common modes
{
<CFString 0x108f42000 [0x107bd39b0]>{contents = "UITrackingRunLoopMode"}
<CFString 0x107ba9800 [0x107bd39b0]>{contents = "kCFRunLoopDefaultMode"}
}
common mode items
(
<CFRunLoopSource>{callout = PurpleEventSignalCallback}}
<CFRunLoopObserver>{callout = _wrapRunLoopWithAutoreleasePoolHandler}
<CFRunLoopSource>{callout = FBSSerialQueueRunLoopSourceHandler}}
<CFRunLoopObserver>{callout = _beforeCACommitHandler}
<CFRunLoopSource>{callout = __handleHIDEventFetcherDrain}}
<CFRunLoopObserver>{callout = _wrapRunLoopWithAutoreleasePoolHandler}
<CFRunLoopObserver>{callout = _afterCACommitHandler}
<CFRunLoopObserver>{callout = _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv}
<CFRunLoopSource>{callout = __handleEventQueue}
<CFRunLoopObserver>{callout = _UIGestureRecognizerUpdateObserver}
<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 17927, subsystem = 0x108ef9998, context = 0x0}}
<CFRunLoopSource>{callout = PurpleEventCallback}}
<CFRunLoopSource>{callout = _ZL27change_notify_port_callbackP12__CFMachPortPvlS1_}
<CFRunLoopTimer>{callout = _ZN2CAL14timer_callbackEP16__CFRunLoopTimerPv}
<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 22535, subsystem =, context =}}
<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 40455, subsystem =, context =}}
)
1) <CFRunLoopMode>{name = UITrackingRunLoopMode, port set = 0x1e07, queue =, source =, timer port = 0x2003}
sources0
(
<CFRunLoopSource>{callout = PurpleEventSignalCallback}
<CFRunLoopSource>{callout = __handleEventQueue}
<CFRunLoopSource>{callout = __handleHIDEventFetcherDrain}
<CFRunLoopSource>{callout = FBSSerialQueueRunLoopSourceHandler}
)
sources1
(
<CFRunLoopSource>{<CFRunLoopSource MIG Server>}
<CFRunLoopSource>{CFMachPort{callout = _ZL27change_notify_port_callbackP12__CFMachPortPvlS1_}}
<CFRunLoopSource>{<CFRunLoopSource MIG Server>}
<CFRunLoopSource>{<CFRunLoopSource MIG Server>}
<CFRunLoopSource>{callout = PurpleEventCallback}
)
observers
(
<CFRunLoopObserver>{activities = 0x1, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler}
<CFRunLoopObserver>{activities = 0x20, repeats = Yes, callout = _UIGestureRecognizerUpdateObserver}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _beforeCACommitHandler}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _afterCACommitHandler}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler}
)
timers
(
<CFRunLoopTimer>{callout = _ZN2CAL14timer_callbackEP16__CFRunLoopTimerPv},
)
2) <CFRunLoopMode>{name = GSEventReceiveRunLoopMode, port set = 0x2d03, queue =, source =, timer port = 0x5303}
sources0
(
<CFRunLoopSource>{callout = PurpleEventSignalCallback}
)
sources1
(
<CFRunLoopSource>{callout = PurpleEventCallback}
)
3) <CFRunLoopMode>{name = kCFRunLoopDefaultMode, port set = 0x1b03, queue =, source =, timer port = 0x2503}
sources0
(
<CFRunLoopSource>{callout = PurpleEventSignalCallback}
<CFRunLoopSource>{callout = __handleEventQueue}
<CFRunLoopSource>{callout = __handleHIDEventFetcherDrain}
<CFRunLoopSource>{callout = FBSSerialQueueRunLoopSourceHandler}
)
sources1
(
<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 17927, subsystem =, context = 0x0}}
<CFRunLoopSource>{callout = _ZL27change_notify_port_callbackP12__CFMachPortPvlS1_}
<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 22535, subsystem =, context =}}
<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 40455, subsystem =, context =}}
<CFRunLoopSource>{callout = PurpleEventCallback}
)
observers
(
<CFRunLoopObserver>{activities = 0x1, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler}
<CFRunLoopObserver>{activities = 0x20, repeats = Yes, callout = _UIGestureRecognizerUpdateObserver}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _beforeCACommitHandler}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _afterCACommitHandler}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler
)
timers
(
<CFRunLoopTimer>{callout = _ZN2CAL14timer_callbackEP16__CFRunLoopTimerPv}
)
4) <CFRunLoopMode]>{name = kCFRunLoopCommonModes, port set = 0x470f, queue =, source =, timer port = 0xa907}
观察者
typedef enum CFRunLoopActivity : CFOptionFlags {
kCFRunLoopEntry = (1UL << 0),
kCFRunLoopBeforeTimers = (1UL << 1),
kCFRunLoopBeforeSources = (1UL << 2),
kCFRunLoopBeforeWaiting = (1UL << 5),
kCFRunLoopAfterWaiting = (1UL << 6),
kCFRunLoopExit = (1UL << 7),
kCFRunLoopAllActivities = 0x0FFFFFFFU
} CFRunLoopActivity;
- <<<<<<主线程RunLoop 用到的 Activity>>>>>>
0x01 == 00000001 ===>>> kCFRunLoopEntry
0x20 == 00100000 ===>>> kCFRunLoopBeforeWaiting
0xa0 == 10100000 ===>>> kCFRunLoopBeforeWaiting | kCFRunLoopExit
- autorelease pool : _wrapRunLoopWithAutoreleasePoolHandler: 主消息循环在进入和等待或者退出注册了handler,来处理自动释放池
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