如何自定义捕获线上崩溃日志

iOS SDK中提供了一个现成的函数 NSSetUncaughtExceptionHandler 用来做异常处理 ，利用NSSetUncaughtExceptionHandler，当程序异常退出的时候，可以先进行处理，然后做一些自定义的动作,并通知开发者。

#import 
// 崩溃日志
@interface MyUncaughtExceptionHandler : NSObject
 
+ (void)setDefaultHandler;
+ (NSUncaughtExceptionHandler *)getHandler;
+ (void)TakeException:(NSException *) exception;
 
end

#import "AFNetworking.h"
// 沙盒的地址
NSString * applicationDocumentsDirectory() {
    return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
}
 
// 崩溃时的回调函数
void UncaughtExceptionHandler(NSException * exception) {
    NSArray * arr = [exception callStackSymbols];
    NSString * reason = [exception reason]; // // 崩溃的原因  可以有崩溃的原因(数组越界,字典nil,调用未知方法...) 崩溃的控制器以及方法
    NSString * name = [exception name];
    NSString * url = [NSString stringWithFormat:@"========异常错误报告========\nname:%@\nreason:\n%@\ncallStackSymbols:\n%@",name,reason,[arr componentsJoinedByString:@"\n"]];
    NSString * path = [applicationDocumentsDirectory() stringByAppendingPathComponent:@"Exception.txt"];
    // 将一个txt文件写入沙盒
    [url writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];
 
}
 
 
@implementation MyUncaughtExceptionHandler
 
// 沙盒地址
- (NSString *)applicationDocumentsDirectory {
    return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
}
 
+ (void)setDefaultHandler {
    NSSetUncaughtExceptionHandler(&UncaughtExceptionHandler);
}
 
+ (NSUncaughtExceptionHandler *)getHandler {
    return NSGetUncaughtExceptionHandler();
}
 
+ (void)TakeException:(NSException *)exception {
    NSArray * arr = [exception callStackSymbols];
    NSString * reason = [exception reason];
    NSString * name = [exception name];
    NSString * url = [NSString stringWithFormat:@"========异常错误报告========\nname:%@\nreason:\n%@\ncallStackSymbols:\n%@",name,reason,[arr componentsJoinedByString:@"\n"]];
    NSString * path = [applicationDocumentsDirectory() stringByAppendingPathComponent:@"Exception.txt"];
    [url writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
 
@end

在appledelegate导入头文件加上一个异常捕获监听，用来处理程序崩溃时的回调动作 在这里也要判断一下之前有没有崩溃日志 如果有发送给服务器

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   #pragma mark -- 崩溃日志
    [MyUncaughtExceptionHandler setDefaultHandler];
    // 发送崩溃日志
    NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    NSString *dataPath = [path stringByAppendingPathComponent:@"Exception.txt"];
    NSData *data = [NSData dataWithContentsOfFile:dataPath];
    if (data != nil) {
         [self sendExceptionLogWithData:data path:dataPath];
    }
 
    return YES;
}
 
#pragma mark -- 发送崩溃日志
- (void)sendExceptionLogWithData:(NSData *)data path:(NSString *)path {
 
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.requestSerializer.timeoutInterval = 5.0f;
    //告诉AFN，支持接受 text/xml 的数据
    [AFJSONResponseSerializer serializer].acceptableContentTypes = [NSSet setWithObject:@"text/plain"];
    NSString *urlString = @"后台地址";
    [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id  _Nonnull formData) {
        [formData appendPartWithFileData:data name:@"file" fileName:@"Exception.txt" mimeType:@"txt"];
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nonnull responseObject) {
        // 删除文件
        NSFileManager *fileManger = [NSFileManager defaultManager];
        [fileManger removeItemAtPath:path error:nil];
    } failure:^(NSURLSessionDataTask * _Nonnull task, NSError * _Nonnull error) {
    }];
 
}