app大都会crash，而第三方平台截获的崩溃日志，需要文件描述符才能解析。手机上的崩溃日志有时候也定位不到具体行。
我的建议是为了方便，测试版本可以本地记录崩溃日志。线上版本可以使用fir或bugly.
本地记录的好处是实时获取，不需要本地文件描述符。
本地记录崩溃日志的方法是增加如下代码：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self configDDLog];
return YES;
}
- (void)configDDLog {
#ifdef DEBUG
//把崩溃日志写入文件
[GBLogWrite redirectNSLogToDocumentFolder];
#endif
}
打印本地日志的方法是由以前我的同步日志改进过来的。我的同步日志连续快速打印有性能问题，但是应用崩溃前打印一次不在话下，没有任何问题：
GBLogWrite.h文件
//
// GBLogWrite.h
// GreenBusiness
//
// Created by 郏国上 on 2017/3/31.
// Copyright © 2017年 UXing. All rights reserved.
//
#import <Foundation/Foundation.h>
#define ERR_LOG 1 /* 应用程序无法正常完成操作，比如网络断开，内存分配失败等 */
#define WARN_LOG 2 /* 进入一个异常分支，但并不会引起程序错误 */
#define INFO_LOG 3 /* 日常运行提示信息，比如登录、退出日志 */
#define DEBUG_LOG 4 /* 调试信息，打印比较频繁，打印内容较多的日志 */
#ifndef LOGERR
#define LOGERR(format,...) WriteLog(ERR_LOG,__FUNCTION__,__LINE__,format,##__VA_ARGS__)
#endif
#ifndef LOGWARN
#define LOGWARN(format,...) WriteLog(WARN_LOG,__FUNCTION__,__LINE__,format,##__VA_ARGS__)
#endif
#ifndef LOGINFO
#define LOGINFO(format,...) WriteLog(INFO_LOG,__FUNCTION__,__LINE__,format,##__VA_ARGS__)
#endif
#ifndef LOGDEBUG
#define LOGDEBUG(format,...) WriteLog(DEBUG_LOG,__FUNCTION__,__LINE__,format,##__VA_ARGS__)
#endif
@interface GBLogWrite : NSObject
+ (void)redirectNSLogToDocumentFolder;
@endGBLogWrite.m文件
//
// GBLogWrite.m
// GreenBusiness
//
// Created by 郏国上 on 2017/3/31.
// Copyright © 2017年 UXing. All rights reserved.
//
#import "GBLogWrite.h"
static const long g_logFilesCount = 3;
static const long g_logFileLines = 65535;
@implementation GBLogWrite
NSString *getTime(void)
{
NSDateFormatter * formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss:SSS"];
NSString* dateTime = [formatter stringFromDate:[NSDate date]];
return dateTime;
}
void WriteFileLog(NSString *format, ...)
{
va_list args;
va_start(args, format);
NSString *string = [[NSString alloc] initWithFormat:format arguments:args];
va_end(args);
if(!string)
{
return;
}
NSFileManager* fm = [NSFileManager defaultManager];
NSString *str = nil;
BOOL flag = NO;
NSArray* myPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* myDocPath = [myPaths objectAtIndex:0];
NSString* path = [myDocPath stringByAppendingPathComponent:@"crash"];
[fm fileExistsAtPath:path isDirectory:&flag];
NSArray *dirarray = nil;
NSString* filePath = nil;
NSArray *lines = nil;
NSError *error = nil;
NSData* data = nil;
NSInteger n = 0, i = 0, m = 0;
NSMutableArray *filesMutableArr = [NSMutableArray array];
NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
NSString *app_Name = [infoDictionary objectForKey:@"CFBundleName"];
if(flag)
{
// dirarray = [fm contentsOfDirectoryAtPath:filePath];
// FLDDLogDebug(@"%@ ",dirarray);
dirarray = [fm contentsOfDirectoryAtPath:path error:nil];
NSLog(@"%@ ",dirarray);
n = dirarray.count;
for(i = 0; i < n; i++)
{
filePath = [path stringByAppendingPathComponent:dirarray[i]];
if ([fm fileExistsAtPath:filePath])
{
[filesMutableArr addObject:filePath];
}
}
m = filesMutableArr.count;
if(m > g_logFilesCount)
{
NSMutableArray *newFilesMutableArr = [NSMutableArray array];
for(i = m - g_logFilesCount ; i < m; i++)
{
filePath = filesMutableArr[i];
[newFilesMutableArr addObject:filePath];
}
//若想删除超过指定日志文件个数的最老的文件
for(i = 0; i < m - g_logFilesCount ; i++)
{
filePath = filesMutableArr[i];
[fm removeItemAtPath:filePath error:nil];
}
filesMutableArr = newFilesMutableArr;
m = filesMutableArr.count;
// for(i = 0 ; (m - i > 0) && (i < m - g_logFilesCount); i++)
// {
// filePath = filesMutableArr[m - i];
// [fm removeItemAtPath:filePath error:nil];
// }
}
if(g_logFilesCount == m)
{
filePath = filesMutableArr[m - 1];
lines = [[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil]
componentsSeparatedByString:@"\n"];
if(lines.count < g_logFileLines)
{
data = [NSData dataWithContentsOfFile:filePath];
str =[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
str = [NSString stringWithFormat:@"%@\n%@",str,string];
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
else
{
[fm removeItemAtPath:filePath error:nil];
str = [NSString stringWithFormat:@"%@ %@.text", app_Name, getTime()];
filePath = [path stringByAppendingPathComponent:str];
str = string;
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
}
else if(m > 0)
{
filePath = filesMutableArr[m - 1];
// str =[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error];
// str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
// NSLog(@"str :%@", str);
lines = [[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil]
componentsSeparatedByString:@"\n"];
// if(lines.count < 65535)
if(lines.count < g_logFileLines)
{
data = [NSData dataWithContentsOfFile:filePath];
str =[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
str = [NSString stringWithFormat:@"%@\n%@",str,string];
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
else
{
str = [NSString stringWithFormat:@"%@ %@.text", app_Name, getTime()];
filePath = [path stringByAppendingPathComponent:str];
str = string;
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
}
else
{
str = [NSString stringWithFormat:@"%@ %@.text", app_Name, getTime()];
filePath = [path stringByAppendingPathComponent:str];
str = string;
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
}
else
{
BOOL res = [fm createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];
if (res) {
// NSLog(@"文件夹创建成功");
str = [NSString stringWithFormat:@"%@ %@.text", app_Name, getTime()];
filePath = [path stringByAppendingPathComponent:str];
str = string;
// NSLog(@"filePath :%@", filePath);
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error];
// NSLog(@"error :%@", error);
}
else
{
NSLog(@"文件夹创建失败");
}
}
}
void WriteLog(int ulErrorLevel, const char *func, int lineNumber, NSString *format, ...)
{
va_list args;
va_start(args, format);
NSString *string = [[NSString alloc] initWithFormat:format arguments:args];
va_end(args);
NSString *strFormat = [NSString stringWithFormat:@"%@%s, %@%i, %@%@",@"Function: ",func,@"Line: ",lineNumber, @"Format: ",string];
NSString * strModelName = @"文件日志"; //模块名
NSString *strErrorLevel = [[NSString alloc] init];
switch (ulErrorLevel) {
case ERR_LOG:
strErrorLevel = @"Error";
break;
case WARN_LOG:
strErrorLevel = @"Warning";
break;
case INFO_LOG:
strErrorLevel = @"Notice";
break;
case DEBUG_LOG:
strErrorLevel = @"Debug";
break;
default:
break;
}
NSLog(@"ModalName: %@, ErrorLevel: %@, %@.",strModelName, strErrorLevel, strFormat);
NSString *str = [NSString stringWithFormat:@"ModalName: %@, ErrorLevel: %@, %@.",strModelName, strErrorLevel, strFormat];
NSLog(@"%@", str);
// WriteLog;
WriteFileLog(str);
}
void UncaughtExceptionHandler(NSException* exception)
{
NSString* name = [ exception name ];
NSString* reason = [ exception reason ];
NSArray* symbols = [ exception callStackSymbols ]; // 异常发生时的调用栈
NSMutableString* strSymbols = [ [ NSMutableString alloc ] init ]; //将调用栈拼成输出日志的字符串
for ( NSString* item in symbols )
{
[ strSymbols appendString: item ];
[ strSymbols appendString: @"\r\n" ];
}
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"]];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString *dateStr = [formatter stringFromDate:[NSDate date]];
LOGERR(@"<- %@ ->[ Uncaught Exception ]\r\nName: %@, Reason: %@\r\n[ Fe Symbols Start ]\r\n%@[ Fe Symbols End ]\r\n\r\n", dateStr, name, reason, strSymbols);
}
+ (void)redirectNSLogToDocumentFolder
{
//未捕获的Objective-C异常日志
NSSetUncaughtExceptionHandler (&UncaughtExceptionHandler);
}
@end打印的崩溃日志：
ModalName: 文件日志, ErrorLevel: Error, Function: UncaughtExceptionHandler, Line: 215, Format: <- 2017-03-31 11:02:48 ->[ Uncaught Exception ]
Name: NSInvalidArgumentException, Reason: *** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]
[ Fe Symbols Start ]
0 CoreFoundation 0x000000018894eff0 <redacted> + 148
1 libobjc.A.dylib 0x00000001873b0538 objc_exception_throw + 56
2 CoreFoundation 0x00000001888302c8 <redacted> + 308
3 CoreFoundation 0x0000000188942c38 <redacted> + 36
4 CoreFoundation 0x0000000188832cbc <redacted> + 36
5 OutdoorClub 0x0000000100133d58 -[ODCCurrentPathLocationDataSingleObject saveCoordateWithFileName:lastLocationOperateModel:] + 308
6 OutdoorClub 0x0000000100132c90 -[ODCCurrentPathLocationDataSingleObject readmis] + 1672
7 OutdoorClub 0x0000000100132324 __50-[ODCCurrentPathLocationDataSingleObject initData]_block_invoke + 100
8 OutdoorClub 0x00000001003c2a10 +[NSTimer(YYAdd) _yy_ExecBlock:] + 148
9 Foundation 0x0000000189443760 __NSFireTimer + 88
10 CoreFoundation 0x00000001888fda9c <redacted> + 28
11 CoreFoundation 0x00000001888fd7a0 <redacted> + 856
12 CoreFoundation 0x00000001888fd060 <redacted> + 244
13 CoreFoundation 0x00000001888fac84 <redacted> + 1484
14 CoreFoundation 0x000000018882ad94 CFRunLoopRunSpecific + 424
15 GraphicsServices 0x000000018a294074 GSEventRunModal + 100
16 UIKit 0x000000018eae3130 UIApplicationMain + 208
17 OutdoorClub 0x000000010014853c main + 124
18 libdyld.dylib 0x000000018783959c <redacted> + 4
[ Fe Symbols End ]
.
ModalName: 文件日志, ErrorLevel: Error, Function: UncaughtExceptionHandler, Line: 215, Format: <- 2017-03-31 19:34:33 ->[ Uncaught Exception ]
Name: NSInvalidArgumentException, Reason: *** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]
[ Fe Symbols Start ]
0 CoreFoundation 0x000000018894eff0 <redacted> + 148
1 libobjc.A.dylib 0x00000001873b0538 objc_exception_throw + 56
2 CoreFoundation 0x00000001888302c8 <redacted> + 308
3 CoreFoundation 0x0000000188942c38 <redacted> + 36
4 CoreFoundation 0x0000000188832cbc <redacted> + 36
5 OutdoorClub 0x00000001000c7d38 -[ODCCurrentPathLocationDataSingleObject saveCoordateWithFileName:lastLocationOperateModel:] + 448
6 OutdoorClub 0x00000001000c6be4 -[ODCCurrentPathLocationDataSingleObject readmis] + 1672
7 OutdoorClub 0x00000001000c6254 __50-[ODCCurrentPathLocationDataSingleObject initData]_block_invoke + 100
8 OutdoorClub 0x0000000100356a70 +[NSTimer(YYAdd) _yy_ExecBlock:] + 148
9 Foundation 0x0000000189443760 __NSFireTimer + 88
10 CoreFoundation 0x00000001888fda9c <redacted> + 28
11 CoreFoundation 0x00000001888fd7a0 <redacted> + 856
12 CoreFoundation 0x00000001888fd060 <redacted> + 244
13 CoreFoundation 0x00000001888fac84 <redacted> + 1484
14 CoreFoundation 0x000000018882ad94 CFRunLoopRunSpecific + 424
15 GraphicsServices 0x000000018a294074 GSEventRunModal + 100
16 UIKit 0x000000018eae3130 UIApplicationMain + 208
17 OutdoorClub 0x00000001000dc52c main + 124
18 libdyld.dylib 0x000000018783959c <redacted> + 4
[ Fe Symbols End ]
.
ModalName: 文件日志, ErrorLevel: Error, Function: UncaughtExceptionHandler, Line: 215, Format: <- 2017-04-01 09:35:10 ->[ Uncaught Exception ]
Name: NSInvalidArgumentException, Reason: *** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]
[ Fe Symbols Start ]
0 CoreFoundation 0x000000018894eff0 <redacted> + 148
1 libobjc.A.dylib 0x00000001873b0538 objc_exception_throw + 56
2 CoreFoundation 0x00000001888302c8 <redacted> + 308
3 CoreFoundation 0x0000000188942c38 <redacted> + 36
4 CoreFoundation 0x0000000188832cbc <redacted> + 36
5 OutdoorClub 0x00000001000a3d38 -[ODCCurrentPathLocationDataSingleObject saveCoordateWithFileName:lastLocationOperateModel:] + 448
6 OutdoorClub 0x00000001000a2be4 -[ODCCurrentPathLocationDataSingleObject readmis] + 1672
7 OutdoorClub 0x00000001000a2254 __50-[ODCCurrentPathLocationDataSingleObject initData]_block_invoke + 100
8 OutdoorClub 0x0000000100332a70 +[NSTimer(YYAdd) _yy_ExecBlock:] + 148
9 Foundation 0x0000000189443760 __NSFireTimer + 88
10 CoreFoundation 0x00000001888fda9c <redacted> + 28
11 CoreFoundation 0x00000001888fd7a0 <redacted> + 856
12 CoreFoundation 0x00000001888fd060 <redacted> + 244
13 CoreFoundation 0x00000001888fac84 <redacted> + 1484
14 CoreFoundation 0x000000018882ad94 CFRunLoopRunSpecific + 424
15 GraphicsServices 0x000000018a294074 GSEventRunModal + 100
16 UIKit 0x000000018eae3130 UIApplicationMain + 208
17 OutdoorClub 0x00000001000b852c main + 124
18 libdyld.dylib 0x000000018783959c <redacted> + 4
[ Fe Symbols End ]
.注意：我们的同步日志系统在didFinishLaunchingWithOptions之前的崩溃无能为力，毕竟只有同步日志初始化以后才能记录，估计第三方平台也有这样的问题。
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