2013-
04-
23 13:
29:
04| 分类： 默认分类 |举报|
字号 订阅
编写ios 编程－－使用代码创建新的相册，是参考http://www.touch-code-magazine.com/ios5-saving-photos-in-custom-photo-album-category-for-download/来写的。
ALAssetsLibrary+
CustomPhotoAlbum.h 里的代码是：
#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;
@end
ALAssetsLibrary+
CustomPhotoAlbum.m里的代码是：
#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 接下来，在AppDelegate.m导入RootViewController。
RootViewController.h 里的代码是：
#import <UIKit/UIKit.h>
#import <AssetsLibrary/AssetsLibrary.h>
@interface RootViewController : UIViewController <UIImagePickerControllerDelegate>
@property (strong, atomic) ALAssetsLibrary *
library;
@end
在RootViewController.m里的代码是:
#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
接下来，导入AssetsLibrary.framework。就可以运行了。
转载于:https://www.cnblogs.com/KingQiangzi/p/4036644.html
相关资源：JAVA上百实例源码以及开源项目源代码
