蘋果雖然帶了崩潰日志的功能,但是估計沒幾個人會開啟允許,普通用戶根本就不知道所謂的開發(fā)者對自己有什么作用,還會擔心安全問題.所有我們還必須對程序進行一些處理,以獲取崩潰日志.本篇文章僅獲取了系統(tǒng)崩潰日志的打印,沒有對內(nèi)存方面進行進一步分析.

SDK提供了NSSetUncaughtExceptionHandler類,用來獲取系統(tǒng)的崩潰日志.我們通過捕獲崩潰日志并上傳到服務(wù)器,可以發(fā)現(xiàn)常見的的崩潰問題,特別是在項目緊張,缺少測試時間的時候可以提供很大的幫助.
通過定義UncaughtExceptionHandler類來捕獲并記錄崩潰日志.

#import "UncaughtExceptionHandler.h"

NSString *applicationDocumentsDirectory() {
    return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
}

void UncaughtExceptionHandler(NSException *exception) {
    NSArray *arr = [exception callStackSymbols];
    NSString *reason = [exception reason];
    NSString *name = [exception name];
    NSString *baseMessage = [NSString stringWithFormat:@"IDENTIFIER_NUMBER:  %@\n OSVERSION:     %@\n PHONE_TYPE:   %@\n APP_VERSION:  %@", IDENTIFIER_NUMBER, PHONE_VERSION, PHONE_TYPE, APP_VERSION];
    NSString *url = [NSString stringWithFormat:@"=============Crash Log=============\n%@\nname:\n%@\nreason:\n%@\ncallStackSymbols:\n%@", baseMessage,
                     name,reason,[arr componentsJoinedByString:@"\n"]];
    NSString *path = [applicationDocumentsDirectory() stringByAppendingPathComponent:@"Exception.txt"];
    [url writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];
}

@implementation BPBUncaughtExceptionHandler

- (NSString *)applicationDocumentsDirectory {
    return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
}

+ (void)setDefaultHandler {
    NSSetUncaughtExceptionHandler (&UncaughtExceptionHandler);
}
@end

然后我們需要再定義一個CrashHandler類來將捕獲的崩潰日志上傳到后臺的服務(wù)器.上傳完成之后再刪除文件.

#import "CrashHandler.h"
@implementation BPBCrashHandler

+ (void)uploadCrashLog {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"Exception.txt"];
    NSString *str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
    if (str) {  
        [ServerReqestUtils uploadCrashLogWithContent:str callBack:^(id obj) {
            float code = [obj[@"code"] floatValue];
            if (code == 1000) {  
                NSLog(@"上傳成功!");
                [fileManager removeItemAtPath:filePath error:nil];
            }
        }];
    }
}
@end

最后只需要在didFinishLaunchingWithOptions方法內(nèi)執(zhí)行這兩個方法就可以捕獲崩潰日志了.

 [UncaughtExceptionHandler setDefaultHandler];  
 [CrashHandler uploadCrashLog];  

文章整理參考網(wǎng)絡(luò)文章，如有錯誤，歡迎討論指出。