ios 編程－－使用代碼建立新的相簿隨加項目

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2013-04-23 13:29:04|  分類： 預設分類 |舉報|字型大小 訂閱編寫ios 編程－－使用代碼建立新的相簿，是參考http://www.touch-code-magazine.com/ios5-saving-photos-in-custom-photo-album-category-for-download/來寫的。ALAssetsLibrary+CustomPhotoAlbum.h 裡的代碼是：#import <Foundation/Foundation.h>#import <AssetsLibrary/AssetsLibrary.h>typedef void(^SaveImageCompletion)(NSError* error);@interface ALAssetsLibrary(CustomPhotoAlbum)-(void)saveImage:(UIImage*)image toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock;-(void)addAssetURL:(NSURL*)assetURL toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock;@endALAssetsLibrary+CustomPhotoAlbum.m裡的代碼是：#import "ALAssetsLibrary+CustomPhotoAlbum.h"@implementation ALAssetsLibrary(CustomPhotoAlbum)-(void)saveImage:(UIImage*)image toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock{    [self writeImageToSavedPhotosAlbum:image.CGImage orientation:(ALAssetOrientation)image.imageOrientation                         completionBlock:^(NSURL* assetURL, NSError* error) {                          if (error!=nil) {                              completionBlock(error);                              return;                          }                          [self addAssetURL: assetURL                                     toAlbum:albumName                         withCompletionBlock:completionBlock];                      }];}-(void)addAssetURL:(NSURL*)assetURL toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock{    __block BOOL albumWasFound = NO;    [self enumerateGroupsWithTypes:ALAssetsGroupAlbum     usingBlock:^(ALAssetsGroup *group, BOOL *stop) {        if ([albumName compare: [group valueForProperty:ALAssetsGroupPropertyName]]==NSOrderedSame) {                                albumWasFound = YES;                                [self assetForURL: assetURL                                       resultBlock:^(ALAsset *asset) {                                          [group addAsset: asset];                                          completionBlock(nil);                                      } failureBlock: completionBlock];                                return;                            }                            if (group==nil && albumWasFound==NO) {                                __weak ALAssetsLibrary* weakSelf = self;                                [self addAssetsGroupAlbumWithName:albumName                                                       resultBlock:^(ALAssetsGroup *group) {                                                          [weakSelf assetForURL: assetURL                                                                         resultBlock:^(ALAsset *asset) {                                                                            [group addAsset: asset];                                                                            completionBlock(nil);                                                                        } failureBlock: completionBlock];                                                      } failureBlock: completionBlock];                                return;                            }                        } failureBlock: completionBlock];}@end 接下來，在AppDelegate.m匯入RootViewController。RootViewController.h 裡的代碼是：#import <UIKit/UIKit.h>#import <AssetsLibrary/AssetsLibrary.h>@interface RootViewController : UIViewController <UIImagePickerControllerDelegate>@property (strong, atomic) ALAssetsLibrary * library;@end在RootViewController.m裡的代碼是:#import "RootViewController.h"@interface RootViewController ()@end@implementation RootViewController@synthesize library;- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];    if (self) {        // Custom initialization    }    return self;}-(void)dealloc{    [library release];    library = nil;    [super dealloc];}- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        library = [[ALAssetsLibrary alloc] init];            UIButton * createGroup = [UIButton buttonWithType:UIButtonTypeRoundedRect];    createGroup.frame = CGRectMake( 20, 150, 100, 40);    [createGroup setTitle:@"takePhoto" forState:UIControlStateNormal];    [createGroup addTarget:self action:@selector(takePhotoClick) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:createGroup];        }- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}- (void)takePhotoClick{    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];    imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;    imagePickerController.editing = YES;    imagePickerController.delegate = (id)self;        [self presentModalViewController:imagePickerController animated:YES];}- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{    [library saveImage:image toAlbum:@"Touch Code Magazine" withCompletionBlock:^(NSError *error) {        if (error!=nil) {            NSLog(@"Big error: %@", [error description]);        }    }];    [picker dismissModalViewControllerAnimated:NO];}- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{    [picker dismissModalViewControllerAnimated:NO];}@end接下來，匯入AssetsLibrary.framework。就可以運行了。

 

ios 編程－－使用代碼建立新的相簿隨加項目