照片选择器、图片浏览器 组件的DEMO

USImagePickerController

备注：iOS7~8.0使用ALAsset ----- iOS8.1及以上使用PHAsset

用法

1. 导入头文件

   #import "USImagePickerController.h"

2. 创建并展示 USImagePickerController

   //选择多张照片
   USImagePickerController *controller = [[USImagePickerController alloc] init];
   controller.delegate = self;
   controller.allowsMultipleSelection = YES;
   controller.maxSelectNumber = 9;
   [self presentViewController:controller animated:true completion:nil];
   
   //选择单张照片
   USImagePickerController *controller = [[USImagePickerController alloc] init];
   controller.delegate = self;
   controller.allowsEditing = YES;
   controller.cropMaskAspectRatio = 1;
   [self presentViewController:controller animated:true completion:nil];

3. 相关属性

   /*!
    @property
    @brief 是否允许编辑选择的照片，默认为NO
    */
   @property (nonatomic, assign) BOOL allowsEditing;
   
   /*!
    @property
    @brief 裁剪已选照片时的遮罩区域尺寸的宽高比(allowsEditing必须设置为YES)，默认为1
    */
   @property (nonatomic, assign) CGFloat cropMaskAspectRatio;
   
   /*!
    @property
    @brief 是否允许选择多张照片，默认为NO
    */
   @property (nonatomic, assign) BOOL allowsMultipleSelection;
   
   /*!
    @property
    @brief 在允许选择多张照片的情况，最大选择张数，默认无限制
    */
   @property (nonatomic, assign) NSInteger maxSelectNumber;
   
   /*!
    @property
    @brief 是否已选择使用原图，默认为NO
    */
   @property (nonatomic, assign, readonly) BOOL selectedOriginalImage;

4. PHAsset 和 ALAsset 的扩展方法

   /** 尺寸 */
   - (CGSize)dimensions;
   
   /** 最后编辑时间 */
   - (NSDate *)modifiedDate;
   
   /** 原始文件名 */
   - (NSString *)originalFilename;
   
   /** 全屏图 */
   - (UIImage *)fullScreenImage;
   
   /** 唯一标识 */
   - (NSString *)localIdentifier;
   
   /** 原始比例的缩略图 */
   - (UIImage *)aspectRatioThumbnailImage;
   
   /** 原始比例的高清图 */
   - (UIImage *)aspectRatioHDImage;
   
   /** 原始照片数据 */
   - (NSData *)originalImageData;
   
   /** 通过指定宽高的最大像素值来获取对应的缩略图 */
   - (UIImage *)thumbnailImageWithMaxPixelSize:(CGFloat)maxPixelSize;
   
   /** 通过照片的路径获取对应的Asset实例 */
   + (instancetype)fetchAssetWithIdentifier:(NSString *)identifier;
   
   /**  获取元数据信息, 例如: Exif, GPS, Camera ... */
   - (void)requestMetadataWithCompletionHandler:(void(^)(NSDictionary *metadata))completionHandler;

ImagePickerSheetController

类似于系统短信中的快速选择照片空间

用法

1. 导入头文件

   #import "ImagePickerSheetController.h"

2. 创建并展示 ImagePickerSheetController

   ImagePickerSheetController *controller = [[ImagePickerSheetController alloc] init];
   controller.maximumSelection = 8;
   controller.displaySelectMaxLimit = YES;
   
   ImageAction *action = [[ImageAction alloc] init];
   action.title = @"照片图库";
   action.style = ImageActionStyleDefault;
   [action setSecondaryTitle:^NSString *(NSInteger num) {
       return [NSString stringWithFormat:@"发送 %@ 张照片",@(num)];
   }];
   [action setHandler:^(ImageAction *action) {
       [self presentImagePickerController:UIImagePickerControllerSourceTypePhotoLibrary];
   }];
   [action setSecondaryHandler:^(ImageAction *action, NSInteger num) {
       NSLog(@"controller.selectedImageAssets %@", controller.selectedImageAssets);
   }];
   [controller addAction:action];
   
   action = [[ImageAction alloc] init];
   action.title = @"拍照";
   action.style = ImageActionStyleDefault;
   [action setSecondaryTitle:^NSString *(NSInteger num) {
       return @"添加注释";
   }];
   [action setHandler:^(ImageAction *action) {
       [self presentImagePickerController:UIImagePickerControllerSourceTypeCamera];
   }];
   [action setSecondaryHandler:^(ImageAction *action, NSInteger num) {
   
   }];
   [controller addAction:action];
   
   action = [[ImageAction alloc] init];
   action.title = @"取消";
   action.style = ImageActionStyleCancel;
   [controller addAction:action];
   
   [self presentViewController:controller animated:true completion:nil];

USAssetsPageViewController

图片浏览器

用法

1. 导入头文件

   #import "USAssetsPageViewController.h"

2. 创建并展示 USImagePickerController

   USAssetsPageViewController *pageVC = [[USAssetsPageViewController alloc] initWithAssets:_dataSource];
   pageVC.view.translatesAutoresizingMaskIntoConstraints = NO;
   
   __weak typeof(self) weak_self = self;
   [pageVC setIndexChangedHandler:^(NSInteger index) {
       [weak_self updateTitle:index];
   }];
   pageVC.pageIndex = 0;
   
   [self.view addSubview:pageVC.view];
   [self addChildViewController:pageVC];
   
   NSDictionary *views = @{@"view":pageVC.view};
   [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[view]-0-|" options:0 metrics:nil views:views]];
   [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[view]-0-|" options:0 metrics:nil views:views]];

许可证

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