(1) .h文件
#import <Foundation/Foundation.h>
@interface SMLagMonitor : NSObject
+ (instancetype)shareInstance;
- (void)beginMonitor; //开始监视卡顿
- (void)endMonitor; //停止监视卡顿
@end
(2).m文件
#import "SMLagMonitor.h"
#import <CrashReporter/CrashReporter.h>
@interface SMLagMonitor() {
int timeoutCount;
CFRunLoopObserverRef runLoopObserver;
@public
dispatch_semaphore_t dispatchSemaphore;
CFRunLoopActivity runLoopActivity;
}
@end
@implementation SMLagMonitor
#pragma mark - Interface
+ (instancetype)shareInstance {
static id instance = nil;
static dispatch_once_t dispatchOnce;
dispatch_once(&dispatchOnce, ^{
instance = [[self alloc] init];
});
return instance;
}
- (void)beginMonitor {
if (runLoopObserver) {
return;
}
dispatchSemaphore = dispatch_semaphore_create(0); //Dispatch Semaphore保证同步
//创建一个观察者
CFRunLoopObserverContext context = {0,(__bridge void*)self,NULL,NULL};
runLoopObserver = CFRunLoopObserverCreate(kCFAllocatorDefault,
kCFRunLoopAllActivities,
YES,
0,
&runLoopObserverCallBack,
&context);
//将观察者添加到主线程runloop的common模式下的观察中
CFRunLoopAddObserver(CFRunLoopGetMain(), runLoopObserver, kCFRunLoopCommonModes);
//创建子线程监控
dispatch_async(dispatch_get_global_queue(0, 0), ^{
//子线程开启一个持续的loop用来进行监控
while (YES) {
long semaphoreWait = dispatch_semaphore_wait(dispatchSemaphore, dispatch_time(DISPATCH_TIME_NOW, 30*NSEC_PER_MSEC));
if (semaphoreWait != 0) {
if (!runLoopObserver) {
timeoutCount = 0;
dispatchSemaphore = 0;
runLoopActivity = 0;
return;
}
//两个runloop的状态,BeforeSources和AfterWaiting这两个状态区间时间能够检测到是否卡顿
if (runLoopActivity == kCFRunLoopBeforeSources || runLoopActivity == kCFRunLoopAfterWaiting) {
//出现三次出结果
if (++timeoutCount < 3) {
continue;
}
NSData *lagData = [[[PLCrashReporter alloc]
initWithConfiguration:[[PLCrashReporterConfig alloc] initWithSignalHandlerType:PLCrashReporterSignalHandlerTypeBSD symbolicationStrategy:PLCrashReporterSymbolicationStrategyAll]] generateLiveReport];
PLCrashReport *lagReport = [[PLCrashReport alloc] initWithData:lagData error:NULL];
NSString *lagReportString = [PLCrashReportTextFormatter stringValueForCrashReport:lagReport withTextFormat:PLCrashReportTextFormatiOS];
//将字符串上传服务器
NSLog(@"lag happen, detail below: \n %@",lagReportString);
} //end activity
}// end semaphore wait
timeoutCount = 0;
}// end while
});
}
- (void)endMonitor {
if (!runLoopObserver) {
return;
}
CFRunLoopRemoveObserver(CFRunLoopGetMain(), runLoopObserver, kCFRunLoopCommonModes);
CFRelease(runLoopObserver);
runLoopObserver = NULL;
}
#pragma mark - Private
static void runLoopObserverCallBack(CFRunLoopObserverRef observer, CFRunLoopActivity activity, void *info){
SMLagMonitor *lagMonitor = (__bridge SMLagMonitor*)info;
lagMonitor->runLoopActivity = activity;
dispatch_semaphore_t semaphore = lagMonitor->dispatchSemaphore;
dispatch_semaphore_signal(semaphore);
}
(3)调用方法 在AppDelegate中调用
//卡顿监测
[[SMLagMonitor shareInstance] beginMonitor];
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