獲取系統(tǒng)相機(jī)宝泵、相冊(cè)用法十分簡(jiǎn)單，直接上代碼轩娶，分分鐘學(xué)會(huì)儿奶。
在某ViewController中直接調(diào)用如下代碼即可
1.使用前應(yīng)先判斷是否可用
//照相機(jī)是否可用
BOOL isCameraAvailable = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];
//相冊(cè)是否可用
BOOL isPhotoLibraryAvailable = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary];
2.初始化UIImagePickerController
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
3.設(shè)置picker的類型（只能設(shè)置一個(gè)）
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//設(shè)置為此即打開相冊(cè)
picker.sourceType = UIImagePickerControllerSourceTypeCamera;//設(shè)置為此即打開相機(jī)
4.設(shè)置回調(diào)代理（用于選中圖片或者拍照完成后回圖片的各種信息）
//注意：此處需要遵循兩個(gè)代理協(xié)議
//UIImagePickerControllerDelegate 用于選擇照片或拍照后回調(diào)
//UINavigationControllerDelegate 在相機(jī)/相冊(cè)選擇中會(huì)有Nav進(jìn)行跳轉(zhuǎn)，此代理可以用于監(jiān)聽事件
<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
picker.delegate = self;
5.彈出相機(jī)/相冊(cè)（一定要使用modal形式才可彈出）
[self presentViewController:picker animated:YES completion:nil];
6.實(shí)現(xiàn)代理監(jiān)聽相機(jī)/相冊(cè)回調(diào)
#pragma mark - UIImageViewPickerDelegate 相機(jī)/相冊(cè) 回調(diào)
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
//選擇完成后dismiss選擇控制器罢坝，同時(shí)處理選擇的圖
[picker dismissViewControllerAnimated:YES completion:^
{
//info中有選中圖片的全部信息廓握，根據(jù)需要去獲取，此處獲取的為原圖
UIImage *choiceImage = [info objectForKey:UIImagePickerControllerOriginalImage];
if (picker.sourceType == UIImagePickerControllerSourceTypeCamera)
{
//若為相機(jī)拍攝則保存到相冊(cè)
UIImageWriteToSavedPhotosAlbum(choiceImage, NULL, NULL, NULL);
}
}];
}
補(bǔ)充：
1.picker獲取前置攝像頭 （默認(rèn)為后置UIImagePickerControllerCameraDeviceRear）
picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
2.對(duì)選中圖片進(jìn)行編輯
picker.allowsEditing = YES;設(shè)置后選中圖片則可以進(jìn)行區(qū)域編輯
3.以上屬性需要在present之前設(shè)置有效
