一、带弹框的权限判断

typedef void (^FinishPicking)(UIImage *image);@interface ImagePicker : NSObject <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
// 访问相机
+ (void)showCameraFromVC:(UIViewController *)fromVC finishPicking:(FinishPicking)finishPicking;
// 访问相册
+ (void)showAlbumFromVC:(UIViewController *)fromVC finishPicking:(FinishPicking)finishPicking;
@end

#import <Photos/PHPhotoLibrary.h>
#import <AVFoundation/AVCaptureDevice.h>


static FinishPicking _finishPicking;@implementation ImagePicker// 访问相机功能
+ (void)showCameraFromVC:(UIViewController *)fromVC finishPicking:(FinishPicking)finishPicking {_finishPicking = [finishPicking copy];// 判断相机授权，弹出访问权限提示框[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {dispatch_async(dispatch_get_main_queue(),^{if (granted) { // 授权成功[self openCamera:fromVC];} else { // 拒绝授权[self showCameraPermissionsTipPopView:fromVC];}});}];
}// 打开相机
+ (void)openCamera:(UIViewController *)fromVC {if (@available(iOS 11.0, *)) {[UIScrollView appearance].contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentAlways;}UIImagePickerController *ipv = [[UIImagePickerController alloc] init];ipv.delegate = [self self];ipv.sourceType = UIImagePickerControllerSourceTypeCamera;ipv.modalPresentationStyle = UIModalPresentationFullScreen;[fromVC presentViewController:ipv animated:YES completion:nil];
}// 不能打开相机时提示
+ (void)showCameraPermissionsTipPopView:(UIViewController *)fromVC {UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"请在手机系统设置中开启此权限" preferredStyle:UIAlertControllerStyleAlert];[alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {}]];[alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {[self openSettings];}]];[fromVC presentViewController:alert animated:YES completion:nil];
}// 访问相册功能
+ (void)showAlbumFromVC:(UIViewController *)fromVC finishPicking:(FinishPicking)finishPicking {_finishPicking = [finishPicking copy];// 判断相册授权，弹出访问权限提示框[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {dispatch_async(dispatch_get_main_queue(),^{if (status == PHAuthorizationStatusAuthorized) {[self openPhotoAlbum:fromVC];} else {[self showPhotoAlbumPermissionsTipPopView:fromVC];}});}];
}// 打开相册
+ (void)openPhotoAlbum:(UIViewController *)fromVC {if (@available(iOS 11.0, *)) {[UIScrollView appearance].contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentAlways;}UIImagePickerController *ipv = [[UIImagePickerController alloc] init];ipv.delegate = [self self];ipv.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;ipv.modalPresentationStyle = UIModalPresentationFullScreen;[fromVC presentViewController:ipv animated:YES completion:nil];
}// 不能打开相册时提示
+ (void)showPhotoAlbumPermissionsTipPopView:(UIViewController *)fromVC {UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"请在手机系统设置中开启此权限" preferredStyle:UIAlertControllerStyleAlert];[alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {}]];[alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {[self openSettings];}]];[fromVC presentViewController:alert animated:YES completion:nil];
}// 打开设置
+ (void)openSettings {NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];if ([[UIApplication sharedApplication] canOpenURL:url]) {if (@available(iOS 10.0, *)) {[[UIApplication sharedApplication] openURL:url options:@{} completionHandler:^(BOOL success) {}];} else {[[UIApplication sharedApplication] openURL:url];}}
}// 回调
+ (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];if (image && _finishPicking) {_finishPicking(image);_finishPicking = nil;}[picker dismissViewControllerAnimated:YES completion:^{if (@available(iOS 11.0, *)) {[UIScrollView appearance].contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;}}];
}+ (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {[picker dismissViewControllerAnimated:YES completion:^{if (@available(iOS 11.0, *)) {[UIScrollView appearance].contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;}}];
}@end

二、无弹框的权限判断

PHAuthorizationStatus authorizationStatus = [PHPhotoLibrary authorizationStatus];if (authorizationStatus == PHAuthorizationStatusAuthorized) {return YES;} else {return NO;}

AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];if (authStatus == AVAuthorizationStatusAuthorized) {return YES;} else {return NO;}

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一、带弹框的权限判断

二、无弹框的权限判断

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