连续启动 crash 自修复技术实现与原理解析

Table of Contents generated with DocToc

• 前言
• 实现原理
• 优化：降低50%以上误报机率

• 对原有API设计的几点优化意见

  • 1. 机制状态应当用枚举来做为API透出
  • 2. 关键数值应当做为初始化参数供用户设置
  • 3. 修复、上报逻辑应当支持用户异步操作
• 什么时候会出现该异常？
• 连续启动 crash 自修复技术实现与原理解析

作者：阿里云-移动云-大前端团队

前言

连续启动 Crash 应该是 crash 类型中zui，

在微信读书团队发布的《iOS 启动连续闪退保护方案》 一文中，给出了连续启动crash的自修复技术的思路讲解，并在GitHub上给出了技术实现，并开源了 GYBootingProtection。方案思路很好，很轻量级。

实现原理

在微信读书团队给出的文章中已经有比较详细的阐述，在此不做赘述，实现的流程图如下所示：

但有个实现上可以优化下，可以降低50%以上误报机率，监听用户手动划掉 APP 这个事件，其中一些特定场景，是可以获取的。另外在这里也给出对其 API 设计的建议。最后给出优化后的实现。

优化：降低50%以上误报机率

用户主动 kill 掉 APP 分为两种情况：

• App在前台时用户手动划掉APP的时候
• APP在后台时划掉APP

第一种场景更为常见，可以通过监听 UIApplicationWillTerminateNotification 来捕获该动作，捕获后恢复计数。第二种情况，无法监听到。但也足以降低 50% 以上的误报机率。

对原有API设计的几点优化意见

1. 机制状态应当用枚举来做为API透出

该机制当前所处的状态，比如：NeedFix 、isFixing，建议用枚举来做为API透出。比如：

typedef NS_ENUM(NSInteger, BootingProtectionStatus) {
   BootingProtectionStatusNormal,  /**<  APP 启动正常 */
   BootingProtectionStatusNormalChecking,  /**< 正在检测是否会在特定时间内是否会 Crash，注意：检测状态下“连续启动崩溃计数”个数小于或等于上限值 */
   BootingProtectionStatusNeedFix, /**< APP 出现连续启动 Crash，需要采取修复措施 */
   BootingProtectionStatusFixing,   /**< APP 出现连续启动 Crash，正在修复中... */
};

2. 关键数值应当做为初始化参数供用户设置

/*!
* 当前启动Crash的状态
*/
@property (nonatomic, assign, readonly) ABSBootingProtectionStatus bootingProtectionStatus;

/*!
* 达到需要执行上报操作的“连续启动崩溃计数”个数。
*/
@property (nonatomic, assign, readonly) NSUInteger continuousCrashOnLaunchNeedToReport;

/*!
* 达到需要执行修复操作的“连续启动崩溃计数”个数。
*/
@property (nonatomic, assign, readonly) NSUInteger continuousCrashOnLaunchNeedToFix;

/*!
* APP 启动后经过多少秒，可以将“连续启动崩溃计数”清零
*/
@property (nonatomic, assign, readonly) NSTimeInterval crashOnLaunchTimeIntervalThreshold;

3. 修复、上报逻辑应当支持用户异步操作

reportBlock 上报逻辑，
repairtBlock 修复逻辑

typedef void (^BoolCompletionHandler)(BOOL succeeded, NSError *error);
typedef void (^RepairBlock)(ABSBoolCompletionHandler completionHandler);

用户执行 BoolCompletionHandler 后即可知道是否执行完毕，并且支持异步操作。

异步操作带来的问题，可以通过前面提到的枚举API来实时监测状态，来决定各种其他操作。

什么时候会出现该异常？

连续启动 crash 自修复技术实现与原理解析

下面给出优化后的代码实现：

//
//  CYLBootingProtection.h
//  
//
//  Created by ChenYilong on 18/01/10.
//  Copyright © 2018年 ChenYilong. All rights reserved.
//

#import <Foundation/Foundation.h>

typedef void (^ABSBoolCompletionHandler)(BOOL succeeded, NSError *error);
typedef void (^ABSRepairBlock)(ABSBoolCompletionHandler completionHandler);
typedef void (^ABSReportBlock)(NSUInteger crashCounts);

typedef NS_ENUM(NSInteger, BootingProtectionStatus) {
   BootingProtectionStatusNormal,  /**<  APP 启动正常 */
   BootingProtectionStatusNormalChecking,  /**< 正在检测是否会在特定时间内是否会 Crash，注意：检测状态下“连续启动崩溃计数”个数小于或等于上限值 */
   BootingProtectionStatusNeedFix, /**< APP 出现连续启动 Crash，需要采取修复措施 */
   BootingProtectionStatusFixing,   /**< APP 出现连续启动 Crash，正在修复中... */
};

/**
* 启动连续 crash 保护。
* 启动后 `_crashOnLaunchTimeIntervalThreshold` 秒内 crash，反复超过 `_continuousCrashOnLaunchNeedToReport` 次则上报日志，超过 `_continuousCrashOnLaunchNeedToFix` 则启动修复操作。
*/
@interface CYLBootingProtection : NSObject

/**
* 启动连续 crash 保护方法。
* 前置条件：在 App 启动时注册 crash 处理函数，在 crash 时调用[CYLBootingProtection addCrashCountIfNeeded]。
* 启动后一定时间内（`crashOnLaunchTimeIntervalThreshold`秒内）crash，反复超过一定次数（`continuousCrashOnLaunchNeedToReport`次）则上报日志，超过一定次数（`continuousCrashOnLaunchNeedToFix`次）则启动修复程序；在一定时间内（`crashOnLaunchTimeIntervalThreshold`秒） 秒后若没有 crash 将“连续启动崩溃计数”计数置零。
 `reportBlock` 上报逻辑，
 `repairtBlock` 修复逻辑，完成后执行 `[self setCrashCount:0]`

*/
- (void)launchContinuousCrashProtect;

/*!
* 当前启动Crash的状态
*/
@property (nonatomic, assign, readonly) BootingProtectionStatus bootingProtectionStatus;

/*!
* 达到需要执行上报操作的“连续启动崩溃计数”个数。
*/
@property (nonatomic, assign, readonly) NSUInteger continuousCrashOnLaunchNeedToReport;

/*!
* 达到需要执行修复操作的“连续启动崩溃计数”个数。
*/
@property (nonatomic, assign, readonly) NSUInteger continuousCrashOnLaunchNeedToFix;

/*!
* APP 启动后经过多少秒，可以将“连续启动崩溃计数”清零
*/
@property (nonatomic, assign, readonly) NSTimeInterval crashOnLaunchTimeIntervalThreshold;

/*!
* 借助 context 可以让多个模块注册事件，并且事件 block 能独立执行，互不干扰。
*/
@property (nonatomic, copy, readonly) NSString *context;

/*!
* @details 启动后kCrashOnLaunchTimeIntervalThreshold秒内crash，反复超过continuousCrashOnLaunchNeedToReport次则上报日志，超过continuousCrashOnLaunchNeedToFix则启动修复程序；当所有操作完成后，执行 completion。在 crashOnLaunchTimeIntervalThreshold 秒后若没有 crash 将 kContinuousCrashOnLaunchCounterKey 计数置零。
* @param context 借助 context 可以让多个模块注册事件，并且事件 block 能独立执行，互不干扰。
*/
- (instancetype)initWithContinuousCrashOnLaunchNeedToReport:(NSUInteger)continuousCrashOnLaunchNeedToReport
                          continuousCrashOnLaunchNeedToFix:(NSUInteger)continuousCrashOnLaunchNeedToFix
                        crashOnLaunchTimeIntervalThreshold:(NSTimeInterval)crashOnLaunchTimeIntervalThreshold
                                                   context:(NSString *)context;
/*!
* 当前“连续启动崩溃“的状态
*/
+ (BootingProtectionStatus)bootingProtectionStatusWithContext:(NSString *)context continuousCrashOnLaunchNeedToFix:(NSUInteger)continuousCrashOnLaunchNeedToFix;

/*!
* 设置上报逻辑，参数 crashCounts 为启动连续 crash 次数
*/
- (void)setReportBlock:(ABSReportBlock)reportBlock;

/*!
* 设置修复逻辑
*/
- (void)setRepairBlock:(ABSRepairBlock)repairtBlock;

+ (void)setLogger:(void (^)(NSString *))logger;

@end

//
//  CYLBootingProtection.m
//
//
//  Created by ChenYilong on 18/01/10.
//  Copyright © 2018年 ChenYilong. All rights reserved.
//

#import "CYLBootingProtection.h"
#import <UIKit/UIKit.h>

static dispatch_queue_t _exceptionOperationQueue = 0;
void (^Logger)(NSString *log);

@interface CYLBootingProtection ()

@property (nonatomic, assign) NSUInteger continuousCrashOnLaunchNeedToReport;
@property (nonatomic, assign) NSUInteger continuousCrashOnLaunchNeedToFix;
@property (nonatomic, assign) NSTimeInterval crashOnLaunchTimeIntervalThreshold;
@property (nonatomic, copy) NSString *context;
@property (nonatomic, copy) ABSReportBlock reportBlock;
@property (nonatomic, copy) ABSRepairBlock repairBlock;

/*!
* 设置“连续启动崩溃计数”个数
*/
- (void)setCrashCount:(NSInteger)count;

/*!
* 设置“连续启动崩溃计数”个数
*/
+ (void)setCrashCount:(NSUInteger)count context:(NSString *)context;

/*!
* “连续启动崩溃计数”个数
*/
- (NSUInteger)crashCount;

/*!
* “连续启动崩溃计数”个数
*/
+ (NSUInteger)crashCountWithContext:(NSString *)context;

@end

@implementation CYLBootingProtection
+ (void)initialize {
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
       _exceptionOperationQueue = dispatch_queue_create("com.ChenYilong.CYLBootingProtection.fileCacheQueue", DISPATCH_QUEUE_SERIAL);
   });
}
- (instancetype)initWithContinuousCrashOnLaunchNeedToReport:(NSUInteger)continuousCrashOnLaunchNeedToReport
                          continuousCrashOnLaunchNeedToFix:(NSUInteger)continuousCrashOnLaunchNeedToFix
                        crashOnLaunchTimeIntervalThreshold:(NSTimeInterval)crashOnLaunchTimeIntervalThreshold
                                                   context:(NSString *)context {
   if (!(self = [super init])) {
       return nil;
   }
   _continuousCrashOnLaunchNeedToReport = continuousCrashOnLaunchNeedToReport;
   _continuousCrashOnLaunchNeedToFix = continuousCrashOnLaunchNeedToFix;
   _crashOnLaunchTimeIntervalThreshold = crashOnLaunchTimeIntervalThreshold;
   _context = [context copy];
   [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(applicationWillTerminate:)
                                                name:UIApplicationWillTerminateNotification
                                              object:[UIApplication sharedApplication]];
   return self;
}

/*!
* App在前台时用户手动划掉APP的时候，不计入检测。
* 但是APP在后台时划掉APP，无法检测出来。
* 见：https://stackoverflow.com/a/35041565/3395008
*/
- (void)applicationWillTerminate:(NSNotification *)note {
   BOOL isNormalChecking = [self isNormalChecking];
   if (isNormalChecking) {
       [self decreaseCrashCount];
   }
}

- (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
}

/*
支持同步修复、异步修复，两种修复方式
- 异步修复，不卡顿主UI，但有修复未完成就被再次触发crash、或者用户kill掉的可能。需要用户手动根据修复状态，来选择性地进行操作，应该有回掉。
- 同步修复，最简单直观，在主线程删除或者下载修复包。
*/
- (void)launchContinuousCrashProtect {
   NSAssert(_repairBlock, @"_repairBlock is nil!");
   [[self class] Logger:@"CYLBootingProtection: Launch continuous crash report"];
   [self resetBootingProtectionStatus];
   
   NSUInteger launchCrashes = [self crashCount];
   // 上报
   if (launchCrashes >= self.continuousCrashOnLaunchNeedToReport) {
       NSString *logString = [NSString stringWithFormat:@"CYLBootingProtection: App has continuously crashed for %@ times. Now synchronize uploading crash report and begin fixing procedure.", @(launchCrashes)];
       [[self class] Logger:logString];
       if (_reportBlock) {
           dispatch_async(dispatch_get_main_queue(),^{
               _reportBlock(launchCrashes);
           });
       }
   }
   
   // 修复
   if ([self isUpToBootingProtectionCount]) {
       [[self class] Logger:@"need to repair"];
       [self setIsFixing:YES];
       if (_repairBlock) {
           ABSBoolCompletionHandler completionHandler = ^(BOOL succeeded, NSError *__nullable error){
               if (succeeded) {
                   [self resetCrashCount];
               } else {
                   [[self class] Logger:error.description];
               }
           };
           dispatch_async(dispatch_get_main_queue(),^{
               _repairBlock(completionHandler);
           });
       }
   } else {
       [self increaseCrashCount:launchCrashes];
       // 正常流程，无需修复
       [[self class] Logger:@"need no repair"];
       
       // 记录启动时刻，用于计算启动连续 crash
       // 重置启动 crash 计数
       dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(self.crashOnLaunchTimeIntervalThreshold * NSEC_PER_SEC)), dispatch_get_main_queue(), ^(void){
           // APP活过了阈值时间，重置崩溃计数
           NSString *logString = [NSString stringWithFormat:@"CYLBootingProtection: long live the app ( more than %@ seconds ), now reset crash counts", @(self.crashOnLaunchTimeIntervalThreshold)];
           [[self class] Logger:logString];
           [self resetCrashCount];
       });
   }
}

//减少计数的时机：用户手动划掉APP
- (void)decreaseCrashCount {
   NSUInteger oldCrashCount = [self crashCount];
   [self decreaseCrashCountWithOldCrashCount:oldCrashCount];
}

- (void)decreaseCrashCountWithOldCrashCount:(NSUInteger)oldCrashCount {
   dispatch_sync(_exceptionOperationQueue, ^{
       if (oldCrashCount > 0) {
           [self setCrashCount:oldCrashCount-1];
       }
       [self resetBootingProtectionStatus];
   });
}

//重制计数的时机：修复完成、或者用户手动划掉APP
- (void)resetCrashCount {
   [self setCrashCount:0];
   [self resetBootingProtectionStatus];
}

//只在未达到计数上限时才会增加计数
- (void)increaseCrashCount:(NSUInteger)oldCrashCount {
   dispatch_sync(_exceptionOperationQueue, ^{
       [self setIsNormalChecking:YES];
       [self setCrashCount:oldCrashCount+1];
   });
}

- (void)resetBootingProtectionStatus {
   [self setIsNormalChecking:NO];
   [self setIsFixing:NO];
}

- (BootingProtectionStatus)bootingProtectionStatus {
   return [[self class] bootingProtectionStatusWithContext:_context continuousCrashOnLaunchNeedToFix:_continuousCrashOnLaunchNeedToFix];
}

/*!
*
@attention 注意之所以要检查 `BootingProtectionStatusNormalChecking` 原因如下：

`-launchContinuousCrashProtect` 方法与 `-bootingProtectionStatus` 方法，如果 `-launchContinuousCrashProtect` 先执行，那么会造成如下问题：
假设n为上限，但crash（n-1）次，但是用 `-bootingProtectionStatus` 判断出来，当前已经处于n次了。原因如下：

crash（n-1）次，正常流程，计数+1，变成n次，
随后在检查 `-bootingProtectionStatus` 时，发现已经处于异常状态了，实际是正常状态。所以需要使用`BootingProtectionStatusNormalChecking` 来进行区分。
*/
+ (BootingProtectionStatus)bootingProtectionStatusWithContext:(NSString *)context continuousCrashOnLaunchNeedToFix:(NSUInteger)continuousCrashOnLaunchNeedToFix {
   
   BOOL isNormalChecking = [self isNormalCheckingWithContext:context];
   if (isNormalChecking) {
       return BootingProtectionStatusNormalChecking;
   }
   
   BOOL isUpToBootingProtectionCount = [self isUpToBootingProtectionCountWithContext:context
                                                    continuousCrashOnLaunchNeedToFix:continuousCrashOnLaunchNeedToFix];
   if (!isUpToBootingProtectionCount) {
       return BootingProtectionStatusNormal;
   }
   
   BootingProtectionStatus type;
   BOOL isFixingCrash = [self isFixingCrashWithContext:context];
   if (isFixingCrash) {
       type = BootingProtectionStatusFixing;
   } else {
       type = BootingProtectionStatusNeedFix;
   }
   return type;
}

- (NSUInteger)crashCount {
   return [[self class] crashCountWithContext:_context];
}

- (void)setCrashCount:(NSInteger)count {
   if (count >=0) {
       [[self class] setCrashCount:count context:_context];
   }
}

- (void)setIsFixing:(BOOL)isFixingCrash {
   [[self class] setIsFixing:isFixingCrash context:_context];
}

/*!
* 是否正在修复
*/
- (BOOL)isFixingCrash {
   return [[self class] isFixingCrashWithContext:_context];
}

- (void)setIsNormalChecking:(BOOL)isNormalChecking {
   [[self class] setIsNormalChecking:isNormalChecking context:_context];
}

/*!
* 是否正在检查
*/
- (BOOL)isNormalChecking {
   return [[self class] isNormalCheckingWithContext:_context];
}

+ (NSUInteger)crashCountWithContext:(NSString *)context {
   NSString *continuousCrashOnLaunchCounterKey = [self continuousCrashOnLaunchCounterKeyWithContext:context];
   NSUInteger crashCount = [[NSUserDefaults standardUserDefaults] integerForKey:continuousCrashOnLaunchCounterKey];
   NSString *logString = [NSString stringWithFormat:@"crashCount:%@", @(crashCount)];
   [[self class] Logger:logString];
   return crashCount;
}

+ (void)setCrashCount:(NSUInteger)count context:(NSString *)context {
   NSString *continuousCrashOnLaunchCounterKey = [self continuousCrashOnLaunchCounterKeyWithContext:context];
   NSString *logString = [NSString stringWithFormat:@"setCrashCount:%@", @(count)];
   [[self class] Logger:logString];
   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   [defaults setInteger:count forKey:continuousCrashOnLaunchCounterKey];
   [defaults synchronize];
}

+ (void)setIsFixing:(BOOL)isFixingCrash context:(NSString *)context {
   NSString *continuousCrashFixingKey = [[self class] continuousCrashFixingKeyWithContext:context];
   NSString *logString = [NSString stringWithFormat:@"setisFixingCrash:{%@}", @(isFixingCrash)];
   [[self class] Logger:logString];
   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   [defaults setBool:isFixingCrash forKey:continuousCrashFixingKey];
   [defaults synchronize];
}

+ (BOOL)isFixingCrashWithContext:(NSString *)context {
   NSString *continuousCrashFixingKey = [[self class] continuousCrashFixingKeyWithContext:context];
   BOOL isFixingCrash = [[NSUserDefaults standardUserDefaults] boolForKey:continuousCrashFixingKey];
   NSString *logString = [NSString stringWithFormat:@"isFixingCrash:%@", @(isFixingCrash)];
   [[self class] Logger:logString];
   return isFixingCrash;
}

+ (void)setIsNormalChecking:(BOOL)isNormalChecking context:(NSString *)context {
   NSString *continuousCrashNormalCheckingKey = [[self class] continuousCrashNormalCheckingKeyWithContext:context];
   NSString *logString = [NSString stringWithFormat:@"setIsNormalChecking:{%@}", @(isNormalChecking)];
   [[self class] Logger:logString];
   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   [defaults setBool:isNormalChecking forKey:continuousCrashNormalCheckingKey];
   [defaults synchronize];
}

+ (BOOL)isNormalCheckingWithContext:(NSString *)context {
   NSString *continuousCrashFixingKey = [[self class] continuousCrashNormalCheckingKeyWithContext:context];
   BOOL isFixingCrash = [[NSUserDefaults standardUserDefaults] boolForKey:continuousCrashFixingKey];
   NSString *logString = [NSString stringWithFormat:@"isIsNormalChecking:%@", @(isFixingCrash)];
   [[self class] Logger:logString];
   return isFixingCrash;
}

- (BOOL)isUpToBootingProtectionCount {
   return [[self class] isUpToBootingProtectionCountWithContext:_context continuousCrashOnLaunchNeedToFix:_continuousCrashOnLaunchNeedToFix];
}

+ (BOOL)isUpToBootingProtectionCountWithContext:(NSString *)context continuousCrashOnLaunchNeedToFix:(NSUInteger)continuousCrashOnLaunchNeedToFix {
   BOOL isUpToCount = [self crashCountWithContext:context] >= continuousCrashOnLaunchNeedToFix;
   if (isUpToCount) {
       return YES;
   }
   return NO;
}

- (void)setReportBlock:(ABSReportBlock)block {
   _reportBlock = block;
}

- (void)setRepairBlock:(ABSRepairBlock)block {
   _repairBlock = block;
}

/*!
*  “连续启动崩溃计数”个数，对应的Key
*  默认为 "_CONTINUOUS_CRASH_COUNTER_KEY"
*/
+ (NSString *)continuousCrashOnLaunchCounterKeyWithContext:(NSString *)context {
   BOOL isValid = [[self class] isValidString:context];
   NSString *validContext = isValid ? context : @"";
   NSString *continuousCrashOnLaunchCounterKey = [NSString stringWithFormat:@"%@_CONTINUOUS_CRASH_COUNTER_KEY", validContext];
   return continuousCrashOnLaunchCounterKey;
}

/*!
*  是否正在修复记录，对应的Key
*  默认为 "_CONTINUOUS_CRASH_FIXING_KEY"
*/
+ (NSString *)continuousCrashFixingKeyWithContext:(NSString *)context {
   BOOL isValid = [[self class] isValidString:context];
   NSString *validContext = isValid ? context : @"";
   NSString *continuousCrashFixingKey = [NSString stringWithFormat:@"%@_CONTINUOUS_CRASH_FIXING_KEY", validContext];
   return continuousCrashFixingKey;
}

/*!
*  是否正在检查是否在特定时间内会Crash，对应的Key
*  默认为 "_CONTINUOUS_CRASH_CHECKING_KEY"
*/
+ (NSString *)continuousCrashNormalCheckingKeyWithContext:(NSString *)context {
   BOOL isValid = [[self class] isValidString:context];
   NSString *validContext = isValid ? context : @"";
   NSString *continuousCrashFixingKey = [NSString stringWithFormat:@"%@_CONTINUOUS_CRASH_CHECKING_KEY", validContext];
   return continuousCrashFixingKey;
}

#pragma mark -
#pragma mark - log and util Methods

+ (void)setLogger:(void (^)(NSString *))logger {
   Logger = [logger copy];
}

+ (void)Logger:(NSString *)log {
   if (Logger) Logger(log);
}

+ (BOOL)isValidString:(id)notValidString {
   if (!notValidString) {
       return NO;
   }
   if (![notValidString isKindOfClass:[NSString class]]) {
       return NO;
   }
   NSInteger stringLength = 0;
   @try {
       stringLength = [notValidString length];
   } @catch (NSException *exception) {}
   if (stringLength == 0) {
       return NO;
   }
   return YES;
}

@end

下面是相应的验证步骤：

等待15秒会有对应计数清零的操作日志输出：

2018-01-18 16:25:37.162980+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：CYLBootingProtection: Launch continuous crash report
2018-01-18 16:25:37.163140+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setIsNormalChecking:{0}
2018-01-18 16:25:37.165738+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setisFixingCrash:{0}
2018-01-18 16:25:37.166883+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：crashCount:0
2018-01-18 16:25:37.167102+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：crashCount:0
2018-01-18 16:25:37.167253+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setIsNormalChecking:{1}
2018-01-18 16:25:37.167938+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setCrashCount:1
2018-01-18 16:25:37.168806+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：need no repair










2018-01-18 16:25:52.225197+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：CYLBootingProtection: long live the app ( more than 15 seconds ), now reset crash counts
2018-01-18 16:25:52.225378+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setCrashCount:0
2018-01-18 16:25:52.226234+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setIsNormalChecking:{0}
2018-01-18 16:25:52.226595+0800 BootingProtection[89773:15553277] ?类名与方法名：-[AppDelegate onBeforeBootingProtection]_block_invoke（在第45行），描述：setisFixingCrash:{0}