有一段时间没有更新博客了，今天更新一篇关于最近工作中用到的一个功能，先简单描述一下：我们知道，测试人员在测试客户端产品时，当出现问题或者BUG的时候，都得先对页面截图，然后从相册中选择截图，加上一段描述放到TD库或者直接通过邮件发给开发人员，以方便开发人员进行修改，过程繁琐。通过下面功能的介绍，您可以很方便的让测试人员遇到BUG的时候，摇一摇设备，然后自动截图并保存到应用的沙盒之中。截图保存到沙盒之后，您可以自定义一个问题反馈的页面，对问题进行描述(描述可使用第三方平台，如讯飞语音，实现语音录入的效果)之后，将描述信息和页面截图一起发送给开发人员(可以是邮件，也可以是直接发送到后台)。

　　下面来看看功能是怎么实现的。

　　首先，定义了一个category：ShakeAndCutter

　　UIViewController+ShakeAndCutter.h文件源码：

#import <UIKit/UIKit.h>

@interface UIViewController (ShakeAndCutter)

@end

　　UIViewController+ShakeAndCutter.m文件源码：

 1 #import "UIViewController+ShakeAndCutter.h"
 2 #import <QuartzCore/QuartzCore.h>
 3 #import "TestFeedbackViewController.h"
 4 
 5 @implementation UIViewController (ShakeAndCutter)
 6 
 7 - (BOOL)canBecomeFirstResponder
 8 {
 9     return YES;
10 }
11 
12 #PRagma mark - 摇一摇动作处理
13 
14 - (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
15 {
16     NSLog(@"began");
17 }
18 
19 - (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event
20 {
21     NSLog(@"cancel");
22 }
23 
24 - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
25 {
26     NSLog(@"end");
27     [self cutterViewToDocument];
28     
29     // 这里是自定义的问题反馈页面,也可以直接跳转到系统邮件发送的页面
30     TestFeedbackViewController *testFeedbackViewController = [[[TestFeedbackViewController alloc] initWithNibName:@"TestFeedbackViewController" bundle:nil] autorelease];
31     [self.navigationController pushViewController:testFeedbackViewController animated:YES];
32 }
33 
34 #pragma mark - 截屏处理
35 
36 - (void)cutterViewToDocument
37 {
38     UIWindow *screenWindow = [[UIapplication sharedApplication] keyWindow];
39     
40     UIGraphicsBeginImageContext(screenWindow.frame.size);
41     [screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];
42     UIImage *screenShot = UIGraphicsGetImageFromCurrentImageContext();
43     UIGraphicsEndImageContext();
44     
45     NSData *screenShotPNG = UIImagePNGRepresentation(screenShot);
46     NSError *error = nil;
47     [screenShotPNG writeToFile:[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"error.png"] options:NSAtomicWrite error:&error];
48 }
49 
50 @end

　　至此，摇一摇和截图功能就已经完成了，那么在应用中怎么使用呢？

• 对于IOS6.0以上的设备，只需要在项目的pch文件中引进头文件#import "UIViewController+ShakeAndCutter.h"即可(我在IOS6.0.1、IOS6.1.5、IOS7.0.6设备上已经测试过)，这样测试工作完成之后，您只需要将这行代码注释或者删除就可以了；
• 对于IOS6.0以下的设备，在需要实现摇一摇效果的页面，有可能要加入如下代码(手头没有IOS6.0以下的设备，如果大家有的话，帮忙验证一下，非常感谢)：

　　1.viewDidLoad方法中，添加两行代码：

1 [[UIApplication sharedApplication] setApplicationSupportsShakeToEdit:YES];
2 [self becomeFirstResponder];

        2.viewDidAppear方法中，添加一行代码：

1 [self becomeFirstResponder];

        3.viewDidDisappear方法中，添加一行代码：

1 [self resignFirstResponder];

　　当然，以上的功能，您也可以实现其他的效果：比如说用户问题的反馈等等，具体可以根据应用的需求而定。

　　这里，再附上发送到邮件功能的示例代码：

　　MailViewController.h文件源码：

 1 #import <UIKit/UIKit.h>
 2 #import <MessageUI/MessageUI.h>
 3 #import<MessageUI/MFMailComposeViewController.h>
 4 
 5 @interface MailViewController : UIViewController<MFMailComposeViewControllerDelegate,
 6 MFMessageComposeViewControllerDelegate>
 7 {
 8     UIButton                    *shareToMailButton;
 9 }
10 
11 @end

　　MailViewController.m文件源码：

  1 #import "MailViewController.h"
  2 #import "Constants.h"
  3 
  4 @interface MailViewController ()
  5 
  6 @end
  7 
  8 @implementation MailViewController
  9 
 10 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
 11 {
 12     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
 13     if (self) {
 14         // Custom initialization
 15     }
 16     return self;
 17 }
 18 
 19 - (void)viewDidLoad
 20 {
 21     [super viewDidLoad];
 22     // Do any additional setup after loading the view.
 23     
 24     self.title = @"Bug反馈";
 25     
 26     shareToMailButton = [self buttonWithFrame:CGRectMake(20, 100, 280, 40) action:@selector(btnClicked:) withTag:1000];
 27     [shareToMailButton setTitle:@"Bug反馈" forState:UIControlStateNormal];
 28 }
 29 
 30 - (void)didReceiveMemoryWarning
 31 {
 32     [super didReceiveMemoryWarning];
 33     // Dispose of any resources that can be recreated.
 34 }
 35 
 36 #pragma mark - 自定义方法
 37 
 38 - (void)btnClicked:(id)sender
 39 {
 40     UIButton *btnSender = (UIButton *)sender;
 41     
 42     switch (btnSender.tag)
 43     {
 44         case 1000:  // 分享到邮箱
 45         {
 46             [self showMailPicker];
 47             break;
 48         }
 49         default:
 50             break;
 51     }
 52 }
 53 
 54 /*******************************************************************************
 55  * 方法名称：buttonWithFrame:action:
 56  * 功能描述：初始化页面按钮，并添加到页面视图
 57  * 输入参数：
 58  * 输出参数：
 59  ******************************************************************************/
 60 - (UIButton *)buttonWithFrame:(CGRect)frame action:(SEL)action withTag:(int)tag
 61 {
 62     UIImage *buttonBackgroundImage = [[UIImage imageNamed:@"button_background.png"] stretchableImageWithLeftCapWidth:5 topCapHeight:5];
 63     UIImage *disabledButtonBackgroundImage = [[UIImage imageNamed:@"button_background_disabled.png"] stretchableImageWithLeftCapWidth:5 topCapHeight:5];
 64     
 65     UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
 66     button.frame = frame;
 67     [button setBackgroundImage:buttonBackgroundImage forState:UIControlStateNormal];
 68     [button setBackgroundImage:disabledButtonBackgroundImage forState:UIControlStateDisabled];
 69     [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
 70     [button setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
 71     [button addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];
 72     button.tag = tag;
 73     [self.view addSubview:button];
 74     
 75     return button;
 76 }
 77 
 78 - (void)showMailPicker
 79 {
 80     Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
 81     
 82     if (mailClass !=nil)
 83     {
 84         if ([mailClass canSendMail])
 85         {
 86             [self displayMailComposerSheet];
 87         }
 88         else
 89         {
 90             UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@""message:@"设备不支持邮件功能" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil];
 91             [alert show];
 92             [alert release];
 93         }
 94     }
 95     else
 96     {
 97         
 98     }
 99     
100 }
101 
102 - (void)displayMailComposerSheet
103 {
104     MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
105     
106     // 设置picker的委托方法，完成之后会自动调用成功或失败的方法
107     picker.mailComposeDelegate = self;
108     // 添加主题
109     [picker setSubject:@"Bug反馈"];
110     // 添加收件人
111     NSArray *toRecipients = [NSArray arrayWithObject:@"[email protected]"];
112     // 说明：也可以添加多个收件人，代码如下所示：
113 //    NSArray *toRecipients = [NSArray arrayWithObjects:@"[email protected]",@"[email protected]",nil];
114     // 添加抄送
115 //    NSArray *ccRecipients = [NSArray arrayWithObjects:@"[email protected]",@"[email protected]", nil];
116     // 添加密送
117 //    NSArray *bccRecipients = [NSArray arrayWithObject:@"[email protected]"];
118     
119     [picker setToRecipients:toRecipients];
120 //    [picker setCcRecipients:ccRecipients];
121 //    [picker setBccRecipients:bccRecipients];
122     // 发送图片附件(其他格式的附件，可以都先转化称NSData类型，然后设置相应的mimeType即可，如txt类型为@"text/txt",doc类型为@"text/doc",pdf类型为@"file/pdf"等等)
123     NSData *myData = [NSData dataWithContentsOfFile:[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"error.png"]];
124     [picker addAttachmentData:myData mimeType:@"image/jpeg" fileName:@"error.png"];
125     NSString *emailBody = [NSString stringWithFormat:@"<p>文字没有全部显示</p>"];
126     
127     // 直接在HTML代码中写入图片的地址
128 //    NSString *emailBody = [NSString stringWithFormat:@"<img src='http://p2.so.qhimg.com/t0130e3288d86929b97.jpg' /><p>我分享了图片</p>"];
129     
130     [picker setMessageBody:emailBody isHTML:YES];
131     [self presentModalViewController:picker animated:YES];
132     [picker release];
133 }
134 
135 
136 - (void)mailComposeController:(MFMailComposeViewController*)controller
137           didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
138 {
139     switch (result)
140     {
141         case MFMailComposeResultCancelled:
142             NSLog(@"Result: Mail sending canceled");  // 邮件发送取消  
143             break;
144         case MFMailComposeResultSaved:
145             NSLog(@"Result: Mail saved");  // 邮件保存成功
146             break;
147         case MFMailComposeResultSent:
148             NSLog(@"Result: Mail sent");  // 邮件发送成功
149             break;
150         case MFMailComposeResultFailed:
151             NSLog(@"Result: Mail sending failed");  // 邮件发送失败
152             break;
153         default:
154             NSLog(@"Result: Mail not sent");
155             break;
156     }
157     [self dismissModalViewControllerAnimated:YES];
158 }
159 
160 - (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result
161 {
162     NSLog(@"messageComposeViewController");
163 }
164 
165 @end