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!