186使用系统内的相册

PS：对于 Camera 选项，会调用摄像头，需要真机才能测试。

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController <UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>
4 @property (strong, nonatomic) UIImageView *imgVCustom;
5
6 @end

ViewController.m

 1 #import "ViewController.h"
 2
 3 @interface ViewController ()
 4 - (void)layoutUI;
 5 - (void)showActionSheet:(UIBarButtonItem *)sender;
 6 - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo;
 7 @end
 8
 9 @implementation ViewController
10
11 - (void)viewDidLoad {
12     [super viewDidLoad];
13
14     [self layoutUI];
15 }
16
17 - (void)didReceiveMemoryWarning {
18     [super didReceiveMemoryWarning];
19     // Dispose of any resources that can be recreated.
20 }
21
22 - (void)viewWillAppear:(BOOL)animated {
23     [super viewWillAppear:animated];
24     [self.navigationController setNavigationBarHidden:NO animated:animated];
25     [self.navigationController setToolbarHidden:NO animated:animated];
26 }
27
28 - (void)layoutUI {
29     self.navigationItem.title = @"使用系统内的相册";
30     self.view.backgroundColor = [UIColor whiteColor];
31     UIBarButtonItem *barBtnChooseImage = [[UIBarButtonItem alloc]
32                                           initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
33                                           target:self
34                                           action:@selector(showActionSheet:)];
35     self.toolbarItems = @[barBtnChooseImage];
36
37     _imgVCustom = [[UIImageView alloc] initWithFrame:self.view.bounds];
38     _imgVCustom.contentMode = UIViewContentModeScaleAspectFit;
39     _imgVCustom.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
40     _imgVCustom.image = [UIImage imageNamed:@"1"];
41     [self.view addSubview:_imgVCustom];
42 }
43
44 - (void)showActionSheet:(UIBarButtonItem *)sender {
45     UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"选择相册"
46                                                              delegate:self
47                                                     cancelButtonTitle:@"取消"
48                                                destructiveButtonTitle:nil
49                                                     otherButtonTitles:@"PhotoLibrary", @"Camera", @"SavedPhotosAlbum", nil];
50     [actionSheet showFromToolbar:self.navigationController.toolbar];
51 }
52
53 - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
54     if (error) {
55         NSLog(@"%@", [error localizedDescription]);
56     }
57 }
58
59 #pragma mark - UIActionSheetDelegate
60 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
61     if (buttonIndex != actionSheet.cancelButtonIndex) {
62         UIImagePickerControllerSourceType sourceType = buttonIndex;
63         if ([UIImagePickerController isSourceTypeAvailable:sourceType]) {
64             UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
65             imagePickerController.delegate = self;
66             imagePickerController.sourceType = sourceType;
67             imagePickerController.allowsEditing = YES;
68             [self presentViewController:imagePickerController
69                                animated:YES
70                              completion:nil];
71         }
72     }
73 }
74
75 #pragma mark - UIImagePickerControllerDelegate
76 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
77     UIImage *imgChoice = [info objectForKey:UIImagePickerControllerEditedImage];
78     if (!imgChoice) {
79         imgChoice = [info objectForKey:UIImagePickerControllerOriginalImage];
80     }
81     _imgVCustom.image = imgChoice;
82
83     //把图片保存到相册
84 //    UIImageWriteToSavedPhotosAlbum(imgChoice,
85 //                                   self,
86 //                                   @selector(image:didFinishSavingWithError:contextInfo:),
87 //                                   NULL);
88
89     [self imagePickerControllerDidCancel:picker];
90 }
91
92 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
93     [self dismissViewControllerAnimated:YES completion:nil];
94 }
95
96 @end

AppDelegate.h

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

AppDelegate.m

 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]; //当_window.rootViewController关联时，这一句可有可无
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