iOS开发之收集崩溃信息

iOS 开发中，为了统计用户的一些崩溃信息，从而对崩溃日志进行分析并修复程序，那么除了使用第三方比如友盟等来收集崩溃信息之外，也还可以自己实现收集用户崩溃信息等方法。

AppDelegate.m 文件：
```objectivec
//
//  AppDelegate.m
//  收集崩溃信息
//
//  Created by PengYunjing on 2015/09/07.
//  Copyright © 2015年 PengYunjing All rights reserved.
//

#import "AppDelegate.h"

#define kCrashInfoKey @"kCrashInfoKey"    //崩溃信息 
#define kUserDefaults [NSUserDefaults standardUserDefaults]

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

//收集奔溃信息
    NSSetUncaughtExceptionHandler(&handler);

return YES;
}

/**
 *  产生成了崩溃信息 -- > 发送崩溃信息
 */
void handler(NSException *exception)
{
    //获取崩溃信息
    NSString *name = exception.name;
    NSString *reason = exception.reason;
    NSArray *callStackSymbols = exception.callStackSymbols;
    NSDictionary *userInfo = exception.userInfo;
    NSString *crashLogInfo = [NSString stringWithFormat:@"\nName: %@\nReason: %@\nCallStackSymbols: %@\nUserInfo: %@",name,reason,callStackSymbols,userInfo];

//获取手机信息
    NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
    //系统版本 (e.g. @"8.0")
    NSString *strSysVersion = [[UIDevice currentDevice] systemVersion];
    //软件版本
    NSString *strAppVersion = [infoDictionary objectForKey:@"CFBundleShortVersionString"];

/*
    //拼接发送邮件的内容 -- > 发送邮件
    NSString *urlStr = [NSString stringWithFormat:@"mailto://212969178@qq.com?subject=应用程序崩溃&body=将要发送崩溃信息给开发者，感谢您的配合!\n\n\n系统版本：%@\n软件版本：%@\n\n崩溃详情：%@",strSysVersion,strAppVersion,crashLogInfo];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
    */

//拼接邮件内容 -- > 保存崩溃信息
    NSString *crashStr = [NSString stringWithFormat:@"将要发送崩溃信息给开发者，感谢您的配合!\n\n\n系统版本：%@\n软件版本：%@\n\n崩溃详情：%@",strSysVersion,strAppVersion,crashLogInfo];

//保存崩溃信息到沙盒
    [kUserDefaults setObject:crashStr forKey:kCrashInfoKey];
    [kUserDefaults synchronize];
}
```

ViewController.m 文件：
```objectivec
//
//  ViewController.m
//  收集崩溃信息
//
//  Created by PengYunjing on 2015/09/07.
//  Copyright © 2015年 PengYunjing All rights reserved.
//

#import "ViewController.h"
#import <MessageUI/MessageUI.h>

#define kCrashInfoKey @"kCrashInfoKey"    //崩溃信息
#define kEmailAddress @"12345678@qq.com"
#define kUserDefaults [NSUserDefaults standardUserDefaults]

@interface ViewController () <MFMailComposeViewControllerDelegate>
@property (weak, nonatomic) IBOutlet UIButton *startButton;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

[self.startButton setTitle:@"给我来个崩溃" forState:UIControlStateNormal];

/** 判断是否要发送崩溃信息 **/
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [self whetherSendCrashInfo];
    });
}

- (IBAction)go {
    @[][1];
}

#pragma mark 判断是否发送崩溃信息
- (void)whetherSendCrashInfo {

if ([kUserDefaults objectForKey:kCrashInfoKey]) {
        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"温馨提示!" message:@"检测到上次意外退出，为提高用户体验，您的信息很重要！是否发送崩溃信息给开发者？" preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"不发送" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

[kUserDefaults removeObjectForKey:kCrashInfoKey];
            [kUserDefaults synchronize];
        }];

UIAlertAction *send = [UIAlertAction actionWithTitle:@"发送" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

if (![MFMailComposeViewController canSendMail]) {
                UIAlertView *wAlertView = [[UIAlertView alloc]initWithTitle:@"不能发送邮件!"
                                                                    message:@"请检查邮件设置"
                                                                   delegate:nil
                                                          cancelButtonTitle:@"确定"
                                                          otherButtonTitles:nil];
                [wAlertView show];
                return;
            }else {
                [self sendCrashInfo];
            }

}];

[alert addAction:cancel];
        [alert addAction:send];
        [self presentViewController:alert animated:YES completion:nil];
    }
}

#pragma mark - 发送崩溃信息
- (void)sendCrashInfo {

// 初始化MFMailComposeViewController实例
    MFMailComposeViewController *wMailViewController = [[MFMailComposeViewController alloc] init];
    wMailViewController.mailComposeDelegate = self;

// 设置邮件title
    NSString *title = @"崩溃日志";
    [wMailViewController setSubject:title];

// 设置收件地址
    [wMailViewController setToRecipients:[NSArray arrayWithObject:kEmailAddress]];

// 设置邮件正文内容
    [wMailViewController setMessageBody:[kUserDefaults objectForKey:kCrashInfoKey] isHTML:NO];

// 模态切换弹出
    [self presentViewController:wMailViewController animated:YES completion:^{

}];
}

#pragma mark - MFMailComposeViewControllerDelegate
- (void)mailComposeController:(MFMailComposeViewController *)controller
          didFinishWithResult:(MFMailComposeResult)result
                        error:(NSError *)error
{
    switch (result)
    {
        case MFMailComposeResultCancelled: // 用户取消编辑
            //NSLog(@"取消了编辑");
            break;
        case MFMailComposeResultSaved: // 用户保存邮件
            //NSLog(@"保存了邮件");
            break;
        case MFMailComposeResultSent: // 用户点击发送
            //NSLog(@"已发送");
            break;
        case MFMailComposeResultFailed: // 用户尝试保存或发送邮件失败
            //NSLog(@"发送失败: %@...", [error localizedDescription]);
            break;
    }
    // 关闭邮件发送视图
    [self dismissViewControllerAnimated:YES completion:^{
        [kUserDefaults removeObjectForKey:kCrashInfoKey];
        [kUserDefaults synchronize];
    }];
}

@end
```

iOS开发之收集崩溃信息

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