1 #import <UIKit/UIKit.h>2 3 @interface ViewController : UIViewController <UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>4 5 @end

  1 #import "ViewController.h"  2 #import "sys/utsname.h"  3   4 @interface ViewController ()  5 - (void)layoutUI;  6 - (void)showActionSheet:(UIBarButtonItem *)sender;  7 - (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo;  8 @end  9  10 @implementation ViewController 11  12 - (void)viewDidLoad { 13     [super viewDidLoad]; 14      15     [self layoutUI]; 16 } 17  18 - (void)didReceiveMemoryWarning { 19     [super didReceiveMemoryWarning]; 20     // Dispose of any resources that can be recreated. 21 } 22  23 - (void)viewWillAppear:(BOOL)animated { 24     [super viewWillAppear:animated]; 25     [self.navigationController setNavigationBarHidden:NO animated:animated]; 26     [self.navigationController setToolbarHidden:NO animated:animated]; 27 } 28  29 - (void)layoutUI { 30     self.navigationItem.title = @"實現錄制視頻功能"; 31     self.view.backgroundColor = [UIColor whiteColor]; 32     UIBarButtonItem *barBtnVideo = [[UIBarButtonItem alloc] 33                                           initWithBarButtonSystemItem:UIBarButtonSystemItemCamera 34                                           target:self 35                                           action:@selector(showActionSheet:)]; 36     self.toolbarItems = @[barBtnVideo]; 37 } 38  39 - (void)showActionSheet:(UIBarButtonItem *)sender { 40     UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"錄制視頻" 41                                                              delegate:self 42                                                     cancelButtonTitle:@"取消" 43                                                destructiveButtonTitle:nil 44                                                     otherButtonTitles:@"PhotoLibrary", @"Video", nil]; 45     [actionSheet showFromToolbar:self.navigationController.toolbar]; 46 } 47  48 - (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { 49     if (error) { 50         NSLog(@"%@", [error localizedDescription]); 51     } 52 } 53  54 #pragma mark - UIActionSheetDelegate 55 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { 56     if (buttonIndex != actionSheet.cancelButtonIndex) { 57         UIImagePickerControllerSourceType sourceType = buttonIndex; 58         if ([UIImagePickerController isSourceTypeAvailable:sourceType]) { 59             UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init]; 60             imagePickerController.delegate = self; 61             imagePickerController.sourceType = sourceType; 62             imagePickerController.videoQuality = UIImagePickerControllerQualityType640x480; //設置視頻質量；默認值為UIImagePickerControllerQualityTypeMedium 63             imagePickerController.videoMaximumDuration = 30; //錄制視頻的時間，單位為秒；默認值為10分鐘＝600秒，這里設置為30秒 64              65             NSArray *arrMediaType = [UIImagePickerController availableMediaTypesForSourceType:sourceType]; 66             if ([arrMediaType containsObject:(NSString *)kUTTypeMovie]) { //為了使用kUTTypeMovie，這里需要導入<MobileCoreServices/MobileCoreServices.h> 67                 imagePickerController.mediaTypes = @[(NSString *)kUTTypeMovie]; 68             } else { 69                 NSLog(@"%@ is not available.", kUTTypeMovie); 70             } 71              72             [self presentViewController:imagePickerController 73                                animated:YES 74                              completion:nil]; 75         } 76     } 77      78     /* 79      UIImagePickerControllerQualityType（視頻質量類型枚舉）：經過真機測試，錄制30秒的視頻，清晰度和大小由高到低為： 80      UIImagePickerControllerQualityTypeIFrame1280x720 －－ 135.6 MB 81      UIImagePickerControllerQualityTypeIFrame960x540 －－ 100.1 MB 82      UIImagePickerControllerQualityTypeHigh －－ 61.8 MB 83      UIImagePickerControllerQualityType640x480 －－ 12.7 MB（清晰度和大小來說，更推薦這個） 84      UIImagePickerControllerQualityTypeMedium －－ 2.8 MB（默認值） 85      UIImagePickerControllerQualityTypeLow －－ 721.4 KB（無法直視的模糊?。?/span> 86       87       88      typedef NS_ENUM(NSInteger, UIImagePickerControllerQualityType) { 89      UIImagePickerControllerQualityTypeHigh = 0,       // highest quality 90      UIImagePickerControllerQualityTypeMedium = 1,     // medium quality, suitable for transmission via Wi-Fi 91      UIImagePickerControllerQualityTypeLow = 2,         // lowest quality, suitable for tranmission via cellular network 92      #if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0 93      UIImagePickerControllerQualityType640x480 = 3,    // VGA quality 94      #endif 95      #if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_5_0 96      UIImagePickerControllerQualityTypeIFrame1280x720 = 4, 97      UIImagePickerControllerQualityTypeIFrame960x540 = 5 98      #endif 99      };100      */101 }102 103 #pragma mark - UIImagePickerControllerDelegate104 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {105     //判斷是否是視頻106     NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];107     if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) {108         NSURL *mediaURL = [info objectForKey:UIImagePickerControllerMediaURL];109         NSString *mediaPath = [mediaURL path];110         //判斷視頻路徑是否支持被保存到圖片庫中111         if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(mediaPath)) {112             //將視頻保存到相冊113             UISaveVideoAtPathToSavedPhotosAlbum(mediaPath,114                                                 self,115                                                 @selector(video:didFinishSavingWithError:contextInfo:),116                                                 NULL);117         } else {118             NSLog(@"視頻路徑不支持被保存到圖片庫中");119         }120     }121     122     123     //把圖片保存到相冊124     //    UIImageWriteToSavedPhotosAlbum(imgChoice,125     //                                   self,126     //                                   @selector(image:didFinishSavingWithError:contextInfo:),127     //                                   NULL);128     129     [self imagePickerControllerDidCancel:picker];130 }131 132 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {133     [self dismissViewControllerAnimated:YES completion:nil];134 }135 136 @end

1 #import <UIKit/UIKit.h>2 3 @interface AppDelegate : UIResponder <UIapplicationDelegate>4 @property (strong, nonatomic) UIWindow *window;5 @property (strong, nonatomic) UINavigationController *navigationController;6 7 @end

 1 #import "AppDelegate.h" 2 #import "ViewController.h" 3  4 @interface AppDelegate () 5 @end 6  7 @implementation AppDelegate 8  9 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {10     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];11     ViewController *viewController = [[ViewController alloc] init];12     _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];13     _window.rootViewController = _navigationController;14     //[_window addSubview:_navigationController.view]; //當_window.rootViewController關聯時，這一句可有可無15     [_window makeKeyAndVisible];16     return YES;17 }18 19 - (void)applicationWillResignActive:(UIApplication *)application {20 }21 22 - (void)applicationDidEnterBackground:(UIApplication *)application {23 }24 25 - (void)applicationWillEnterForeground:(UIApplication *)application {26 }27 28 - (void)applicationDidBecomeActive:(UIApplication *)application {29 }30 31 - (void)applicationWillTerminate:(UIApplication *)application {32 }33 34 @end

1 #ifndef FirstBook187_PrefixHeader_pch2 #define FirstBook187_PrefixHeader_pch3 4 // Include any system framework and library headers here that should be included in all compilation units.5 // You will also need to set the Prefix Header build setting of one or more of your targets to reference this file.6 #import <MobileCoreServices/MobileCoreServices.h>7 8 #endif