基于 UIImagePickerController 的拓展封装

基于 UIImagePickerController 的拓展,分别支持调用相机、相册的功能,其中相机可以设置默认调用前后摄像头;

简单对此进行了封装和实现,其中还有很多点可以继续挖掘和优化,该版本具体 code 如下:

声明:

/*

 相机管理

 */

#import <Foundation/Foundation.h>

@protocol YHCameraManagerDelegate <NSObject>

/** 事件回调*/

- (void)YHCameraCallBack:(UIImage *)image;

@end

@interface YHCameraManager : NSObject

@property (nonatomic, assign) id <YHCameraManagerDelegate> delegate;

/** 单例对象*/

+ (instancetype)shareInstance;

/**

 调用相机或相册

 @param deviceType  摄像头设备类型(默认后置摄像头,前置摄像头需将 deviceType 初始值设置为 @"Front")

 @param controller  当前 VC 控件

 */

- (void)openCameraOrPhotoLibraryWithCameraDeviceType:(NSString *)deviceType AndController:(UIViewController *)controller;

/**

 调用相机拍照

 @param deviceType 摄像头设备类型(默认后置摄像头,前置摄像头需将 deviceType 初始值设置为 @"Front")

 @param controller 当前 VC 控件

 */

- (void)openCameraWithCameraDeviceType:(NSString *)deviceType AndController:(UIViewController *)controller;

/**

 调用相机拍摄

 @param deviceType deviceType 摄像头设备类型(默认后置摄像头,前置摄像头需将 deviceType 初始值设置为 @"Front")

 @param controller controller 当前 VC 控件

 */

- (void)openCameraVideoWithCameraDeviceType:(NSString *)deviceType AndController:(UIViewController *)controller;

/**

 调用相册

 @param controller 当前 VC 控件

 */

- (void)openPhotoLibraryWithController:(UIViewController *)controller;

@end

实现:

#import "YHCameraManager.h"

#import <AssetsLibrary/AssetsLibrary.h>// 资源库

@interface YHCameraManager () <UIImagePickerControllerDelegate,UINavigationControllerDelegate>

@end

@implementation YHCameraManager

#pragma mark - ****************************** Base

+ (instancetype)shareInstance {

    static YHCameraManager *singleton = nil;

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        singleton = [[YHCameraManager alloc] init];

    });

    return singleton;

}

#pragma mark - ****************************** Interface methods

/**

 调用相机或相册(默认后置摄像头,前置摄像头需将 deviceType 初始值设置为 @"Front")

 @param deviceType  摄像头设备类型

 @param controller  当前 VC 控件

 */

- (void)openCameraOrPhotoLibraryWithCameraDeviceType:(NSString *)deviceType AndController:(UIViewController *)controller {

    UIAlertController *alertCon = [UIAlertController alertControllerWithTitle:nil

                                                                      message:nil

                                                               preferredStyle:UIAlertControllerStyleActionSheet];

    kWeakSelf(self);

    [alertCon addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        [weakself openCameraWithCameraDeviceType:deviceType AndController:controller];

    }]];

    [alertCon addAction:[UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        [weakself openPhotoLibraryWithController:controller];

    }]];

    [alertCon addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

    }]];

    [controller presentViewController:alertCon animated:YES completion:^{

    }];

}

/**

 调用相机拍照(默认后置摄像头,前置摄像头需将 deviceType 初始值设置为 @"Front")

 @param deviceType 摄像头设备类型

 @param controller 当前 VC 控件

 */

- (void)openCameraWithCameraDeviceType:(NSString *)deviceType AndController:(UIViewController *)controller {

    // 判断是否可以打开照相机

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

        UIImagePickerController *pickerCon = [[UIImagePickerController alloc] init];

        pickerCon.delegate = self;

        pickerCon.allowsEditing = YES;// 设置拍摄的照片是否允许编辑

        // 摄像头

        pickerCon.sourceType = UIImagePickerControllerSourceTypeCamera;

        pickerCon.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;// 设置拍照类型(拍照 & 摄像)

        if ([deviceType isEqualToString:@"Front"]) {// 设置使用手机摄像头类型

            pickerCon.cameraDevice = UIImagePickerControllerCameraDeviceFront;// 设置使用手机前置摄像头

        }

        else {

            pickerCon.cameraDevice = UIImagePickerControllerCameraDeviceRear;// 设置使用手机后置摄像头

        }

        [controller presentViewController:pickerCon animated:YES completion:^{

            NSLog(@"调用了 --- 摄像头");

        }];

    }

    else {

        [MBProgressHUD showCommonHudWithAlertString:@"没有摄像头" afterDelay:2.0 toView:controller.view];

    }

}

/**

 调用相机拍摄

 @param deviceType deviceType 摄像头设备类型(默认后置摄像头,前置摄像头需将 deviceType 初始值设置为 @"Front")

 @param controller controller 当前 VC 控件

 */

- (void)openCameraVideoWithCameraDeviceType:(NSString *)deviceType AndController:(UIViewController *)controller {

    // 判断是否可以打开照相机

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

        UIImagePickerController *pickerCon = [[UIImagePickerController alloc] init];

        pickerCon.delegate = self;

        pickerCon.allowsEditing = YES;// 设置拍摄的照片是否允许编辑

        // 摄像头

        pickerCon.sourceType = UIImagePickerControllerSourceTypeCamera;

        pickerCon.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];// 将 mediaType 设置为所有支持的媒体类型

        pickerCon.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;// 设置拍照类型(拍照 & 摄像)

        pickerCon.videoQuality = UIImagePickerControllerQualityTypeHigh;// 设置拍摄视频的清晰度

        if ([deviceType isEqualToString:@"Front"]) {// 设置使用手机摄像头类型

            pickerCon.cameraDevice = UIImagePickerControllerCameraDeviceFront;// 设置使用手机前置摄像头

        }

        else {

            pickerCon.cameraDevice = UIImagePickerControllerCameraDeviceRear;// 设置使用手机后置摄像头

        }

        [controller presentViewController:pickerCon animated:YES completion:^{

            NSLog(@"调用了 --- 摄像头");

        }];

    }

    else {

        [MBProgressHUD showCommonHudWithAlertString:@"没有摄像头" afterDelay:2.0 toView:controller.view];

    }

}

/**

 调用相册

 @param controller 当前 VC 控件

 */

- (void)openPhotoLibraryWithController:(UIViewController *)controller {

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

        imagePicker.allowsEditing = YES;

        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

        imagePicker.delegate = self;

        [controller presentViewController:imagePicker animated:YES completion:^{

            NSLog(@"调用了 --- 相册");

        }];

    }

    else {

        [MBProgressHUD showCommonHudWithAlertString:@"无法打开相册" afterDelay:2.0 toView:controller.view];

    }

}

#pragma mark - UIImagePickerControllerDelegate

/**

 拍照完成回调

 @param picker  控件

 @param info    数据

 */

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {

    NSLog(@"UIImagePickerControllerDelegate --- FinishPickingMedia");

    // 获取拍摄数据的类型(照片 or 视频)

//    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

    if (picker.sourceType == UIImagePickerControllerSourceTypeCamera || picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {// 图片 [mediaType isEqualToString:(NSString *)kUTTypeImage]

        UIImage *theImg = nil;

        if ([picker allowsEditing]) {// 判断图片是否允许修改

            // 获取用户编辑之后的图像

            theImg = [info objectForKey:UIImagePickerControllerEditedImage];

        }

        else {// 获取原图

            theImg = [info objectForKey:UIImagePickerControllerOriginalImage];

        }

        // 保存图片至相册中

        UIImageWriteToSavedPhotosAlbum(theImg, self, nil, nil);

        // 图片后续处理相关

        if ([self.delegate respondsToSelector:@selector(YHCameraCallBack:)]) {

            [self.delegate YHCameraCallBack:theImg];

        }

    }

    else {// 视频

        // 获取视频文件 url

        NSURL *urlMedia = [info objectForKey:UIImagePickerControllerMediaType];

        // 创建 ALAssetsLibrary 对象并将视频保存到媒体库

        ALAssetsLibrary *assetsLib = [[ALAssetsLibrary alloc] init];

        // 将视频保存至相册

        [assetsLib writeVideoAtPathToSavedPhotosAlbum:urlMedia completionBlock:^(NSURL *assetURL, NSError *error) {

            if (error) {

                NSLog(@"视频拍摄 --- 写入失败:%@", error);

            }

            else {

                NSLog(@"视频拍摄 --- 写入成功");

            }

        }];

    }

    [picker dismissViewControllerAnimated:YES completion:^{

    }];

}

/**

 拍照页面取消选择的时候,调用该方法

 @param picker 当前控件

 */

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

    [picker dismissViewControllerAnimated:YES completion:^{

    }];

}

@end

以上便是此次的分析内容,还望大神多多指教!

巴特西

基于 UIImagePickerController 的拓展封装 - iOS

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