diff --git a/.DS_Store b/.DS_Store
index 107c6aab..a536ae76 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/TZImagePickerController.podspec b/TZImagePickerController.podspec
index 9287ebba..4d86432a 100644
--- a/TZImagePickerController.podspec
+++ b/TZImagePickerController.podspec
@@ -1,13 +1,13 @@
 Pod::Spec.new do |s|
   s.name         = "TZImagePickerController"
-  s.version      = "1.4.5"
+  s.version      = "1.5.0"
   s.summary      = "A clone of UIImagePickerController, support picking multiple photos、original photo and video"
   s.homepage     = "https://github.com/banchichen/TZImagePickerController"
   s.license      = "MIT"
   s.author       = { "banchichen" => "736420282@qq.com" }
   s.platform     = :ios
   s.ios.deployment_target = "6.0"
-  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.4.5" }
+  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.5.0" }
   s.requires_arc = true
   s.resources    = "TZImagePickerController/TZImagePickerController/*.{png,xib,nib,bundle}"
   s.source_files = "TZImagePickerController/TZImagePickerController/*.{h,m}"
diff --git a/TZImagePickerController/Base.lproj/Main.storyboard b/TZImagePickerController/Base.lproj/Main.storyboard
index 0db2aae2..c7cbbd25 100644
--- a/TZImagePickerController/Base.lproj/Main.storyboard
+++ b/TZImagePickerController/Base.lproj/Main.storyboard
@@ -113,10 +113,10 @@
                                             <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="uHt-bT-lBZ">
                                                 <rect key="frame" x="225" y="6" width="51" height="31"/>
                                                 <connections>
-                                                    <action selector="showSheetSwitchClick:" destination="BYZ-38-t0r" eventType="valueChanged" id="sRv-xW-VSh"/>
+                                                    <action selector="showSheetSwitchClick:" destination="BYZ-38-t0r" eventType="valueChanged" id="kmV-vK-SDz"/>
                                                 </connections>
                                             </switch>
-                                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" text="把拍照按钮放在外面(未实现)" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="jop-5R-ioj">
+                                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" text="把拍照按钮放在外面" textAlignment="right" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="jop-5R-ioj">
                                                 <rect key="frame" x="0.0" y="0.0" width="200" height="44"/>
                                                 <fontDescription key="fontDescription" type="system" pointSize="15"/>
                                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
diff --git a/TZImagePickerController/Info.plist b/TZImagePickerController/Info.plist
index f084a731..64b4e243 100644
--- a/TZImagePickerController/Info.plist
+++ b/TZImagePickerController/Info.plist
@@ -17,7 +17,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.4.5</string>
+	<string>1.5.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
diff --git a/TZImagePickerController/TZImagePickerController/TZImagePickerController.h b/TZImagePickerController/TZImagePickerController/TZImagePickerController.h
index e11fd1a8..1f58c357 100644
--- a/TZImagePickerController/TZImagePickerController/TZImagePickerController.h
+++ b/TZImagePickerController/TZImagePickerController/TZImagePickerController.h
@@ -4,7 +4,7 @@
 //
 //  Created by 谭真 on 15/12/24.
 //  Copyright © 2015年 谭真. All rights reserved.
-//  version 1.4.5
+//  version 1.5.0
 
 /*
  经过测试，比起xib的方式，把TZAssetCell改用纯代码的方式来写，滑动帧数明显提高了（约提高10帧左右）
diff --git a/TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m b/TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m
index b354e521..dbf745fe 100644
--- a/TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m
+++ b/TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m
@@ -15,7 +15,7 @@
 #import "TZImageManager.h"
 #import "TZVideoPlayerController.h"
 
-@interface TZPhotoPickerController ()<UICollectionViewDataSource,UICollectionViewDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate> {
+@interface TZPhotoPickerController ()<UICollectionViewDataSource,UICollectionViewDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIAlertViewDelegate> {
     NSMutableArray *_models;
     
     UIButton *_previewButton;
@@ -357,10 +357,10 @@ - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cell
 }
 
 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
-    // take a picture / 去拍照
+    // take a photo / 去拍照
     TZImagePickerController *tzImagePickerVc = (TZImagePickerController *)self.navigationController;
     if (((tzImagePickerVc.sortAscendingByModificationDate && indexPath.row >= _models.count) || (!tzImagePickerVc.sortAscendingByModificationDate && indexPath.row == 0)) && _showTakePhotoBtn)  {
-        [self takePicture]; return;
+        [self takePhoto]; return;
     }
     // preview phote or video / 预览照片或视频
     NSInteger index = indexPath.row;
@@ -395,16 +395,23 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
 
 #pragma mark - Private Method
 
-- (void)takePicture {
-    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
-    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
-        self.imagePickerVc.sourceType = sourceType;
-        if(iOS8Later) {
-            _imagePickerVc.modalPresentationStyle = UIModalPresentationOverCurrentContext;
+- (void)takePhoto {
+    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
+    if ((authStatus == AVAuthorizationStatusRestricted || authStatus ==AVAuthorizationStatusDenied) && iOS8Later) {
+        // 无权限 做一个友好的提示
+        UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"无法使用相机" message:@"请在iPhone的""设置-隐私-相机""中允许访问相机" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"设置", nil];
+        [alert show];
+    } else { // 调用相机
+        UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
+        if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
+            self.imagePickerVc.sourceType = sourceType;
+            if(iOS8Later) {
+                _imagePickerVc.modalPresentationStyle = UIModalPresentationOverCurrentContext;
+            }
+            [self presentViewController:_imagePickerVc animated:YES completion:nil];
+        } else {
+            NSLog(@"模拟器中无法打开照相机,请在真机中使用");
         }
-        [self presentViewController:_imagePickerVc animated:YES completion:nil];
-    } else {
-        NSLog(@"模拟器中无法打开照相机,请在真机中使用");
     }
 }
 
@@ -487,6 +494,18 @@ - (void)checkSelectedModels {
     }
 }
 
+#pragma mark - UIAlertViewDelegate
+
+- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
+    if (buttonIndex == 1) { // 去设置界面，开启相机访问权限
+        if (iOS8Later) {
+            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
+        } else {
+            // [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=Privacy&path=Photos"]];
+        }
+    }
+}
+
 #pragma mark - UIImagePickerControllerDelegate
 
 - (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
diff --git a/TZImagePickerController/ViewController.m b/TZImagePickerController/ViewController.m
index d98044e3..20036b7a 100644
--- a/TZImagePickerController/ViewController.m
+++ b/TZImagePickerController/ViewController.m
@@ -16,7 +16,7 @@
 #import "TZImageManager.h"
 #import "TZVideoPlayerController.h"
 
-@interface ViewController ()<TZImagePickerControllerDelegate,UICollectionViewDataSource,UICollectionViewDelegate> {
+@interface ViewController ()<TZImagePickerControllerDelegate,UICollectionViewDataSource,UICollectionViewDelegate,UIActionSheetDelegate,UIImagePickerControllerDelegate,UIAlertViewDelegate> {
     NSMutableArray *_selectedPhotos;
     NSMutableArray *_selectedAssets;
     BOOL _isSelectOriginalPhoto;
@@ -25,6 +25,7 @@ @interface ViewController ()<TZImagePickerControllerDelegate,UICollectionViewDat
     CGFloat _margin;
     LxGridViewFlowLayout *_layout;
 }
+@property (nonatomic, strong) UIImagePickerController *imagePickerVc;
 @property (nonatomic, strong) UICollectionView *collectionView;
 // 6个设置开关
 @property (weak, nonatomic) IBOutlet UISwitch *showTakePhotoBtnSwitch;  ///< 在内部显示拍照按钮
@@ -37,6 +38,27 @@ @interface ViewController ()<TZImagePickerControllerDelegate,UICollectionViewDat
 
 @implementation ViewController
 
+- (UIImagePickerController *)imagePickerVc {
+    if (_imagePickerVc == nil) {
+        _imagePickerVc = [[UIImagePickerController alloc] init];
+        _imagePickerVc.delegate = self;
+        // set appearance / 改变相册选择页的导航栏外观
+        _imagePickerVc.navigationBar.barTintColor = self.navigationController.navigationBar.barTintColor;
+        _imagePickerVc.navigationBar.tintColor = self.navigationController.navigationBar.tintColor;
+        UIBarButtonItem *tzBarItem, *BarItem;
+        if (iOS9Later) {
+            tzBarItem = [UIBarButtonItem appearanceWhenContainedInInstancesOfClasses:@[[TZImagePickerController class]]];
+            BarItem = [UIBarButtonItem appearanceWhenContainedInInstancesOfClasses:@[[UIImagePickerController class]]];
+        } else {
+            tzBarItem = [UIBarButtonItem appearanceWhenContainedIn:[TZImagePickerController class], nil];
+            BarItem = [UIBarButtonItem appearanceWhenContainedIn:[UIImagePickerController class], nil];
+        }
+        NSDictionary *titleTextAttributes = [tzBarItem titleTextAttributesForState:UIControlStateNormal];
+        [BarItem setTitleTextAttributes:titleTextAttributes forState:UIControlStateNormal];
+    }
+    return _imagePickerVc;
+}
+
 - (void)viewDidLoad {
     [super viewDidLoad];
     self.view.backgroundColor = [UIColor whiteColor];
@@ -87,7 +109,13 @@ - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cell
 
 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
     if (indexPath.row == _selectedPhotos.count) {
-        [self pushImagePickerController];
+        BOOL showSheet = self.showSheetSwitch.isOn;
+        if (showSheet) {
+            UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照",@"去相册选择", nil];
+            [sheet showInView:self.view];
+        } else {
+            [self pushImagePickerController];
+        }
     } else { // preview photos or video / 预览照片或者视频
         id asset = _selectedAssets[indexPath.row];
         BOOL isVideo = NO;
@@ -130,6 +158,8 @@ - (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSInd
     }
 }
 
+#pragma mark - TZImagePickerController
+
 - (void)pushImagePickerController {
     TZImagePickerController *imagePickerVc = [[TZImagePickerController alloc] initWithMaxImagesCount:9 delegate:self];
 
@@ -162,65 +192,90 @@ - (void)pushImagePickerController {
         
     }];
     
-    
     [self presentViewController:imagePickerVc animated:YES completion:nil];
 }
 
-#pragma mark Click Event
+#pragma mark - UIImagePickerController
 
-- (void)deleteBtnClik:(UIButton *)sender {
-    [_selectedPhotos removeObjectAtIndex:sender.tag];
-    [_selectedAssets removeObjectAtIndex:sender.tag];
-    _layout.itemCount = _selectedPhotos.count;
-    
-    [_collectionView performBatchUpdates:^{
-        NSIndexPath *indexPath = [NSIndexPath indexPathForItem:sender.tag inSection:0];
-        [_collectionView deleteItemsAtIndexPaths:@[indexPath]];
-    } completion:^(BOOL finished) {
-        [_collectionView reloadData];
-    }];
-}
-
-- (IBAction)showTakePhotoBtnSwitchClick:(UISwitch *)sender {
-    if (sender.isOn) {
-        [_showSheetSwitch setOn:NO animated:YES];
-        [_allowPickingImageSwitch setOn:YES animated:YES];
+- (void)takePhoto {
+    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
+    if ((authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied) && iOS8Later) {
+        // 无权限 做一个友好的提示
+        UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"无法使用相机" message:@"请在iPhone的""设置-隐私-相机""中允许访问相机" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"设置", nil];
+        [alert show];
+    } else { // 调用相机
+        UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
+        if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
+            self.imagePickerVc.sourceType = sourceType;
+            if(iOS8Later) {
+                _imagePickerVc.modalPresentationStyle = UIModalPresentationOverCurrentContext;
+            }
+            [self presentViewController:_imagePickerVc animated:YES completion:nil];
+        } else {
+            NSLog(@"模拟器中无法打开照相机,请在真机中使用");
+        }
     }
 }
 
-- (IBAction)showSheetSwitchClick:(UISwitch *)sender {
-    if (sender.isOn) {
-        [_showTakePhotoBtnSwitch setOn:NO animated:YES];
+- (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
+    [picker dismissViewControllerAnimated:YES completion:nil];
+    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
+    if ([type isEqualToString:@"public.image"]) {
+        TZImagePickerController *tzImagePickerVc = [[TZImagePickerController alloc] initWithMaxImagesCount:9 delegate:self];
+        tzImagePickerVc.sortAscendingByModificationDate = self.sortAscendingSwitch.isOn;
+        [tzImagePickerVc showProgressHUD];
+        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
+        // save photo and get asset / 保存图片，获取到asset
+        [[TZImageManager manager] savePhotoWithImage:image completion:^{
+            [[TZImageManager manager] getCameraRollAlbum:NO allowPickingImage:YES completion:^(TZAlbumModel *model) {
+                [[TZImageManager manager] getAssetsFromFetchResult:model.result allowPickingVideo:NO allowPickingImage:YES completion:^(NSArray<TZAssetModel *> *models) {
+                    [tzImagePickerVc hideProgressHUD];
+                    TZAssetModel *assetModel = [models firstObject];
+                    if (tzImagePickerVc.sortAscendingByModificationDate) {
+                        assetModel = [models lastObject];
+                    }
+                    [_selectedAssets addObject:assetModel.asset];
+                    [_selectedPhotos addObject:image];
+                    [_collectionView reloadData];
+                }];
+            }];
+        }];
     }
 }
 
-- (IBAction)allowPickingOriginPhotoSwitchClick:(UISwitch *)sender {
-    if (sender.isOn) {
-        [_allowPickingImageSwitch setOn:YES animated:YES];
-    }
+- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
+    [picker dismissViewControllerAnimated:YES completion:nil];
 }
 
-- (IBAction)allowPickingImageSwitchClick:(UISwitch *)sender {
-    if (!sender.isOn) {
-        [_allowPickingOriginalPhotoSwitch setOn:NO animated:YES];
-        [_showTakePhotoBtnSwitch setOn:NO animated:YES];
-        [_allowPickingVideoSwitch setOn:YES animated:YES];
+#pragma mark - UIActionSheetDelegate
+
+- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
+    if (buttonIndex == 0) { // take photo / 去拍照
+        [self takePhoto];
+    } else if (buttonIndex == 1) {
+        [self pushImagePickerController];
     }
 }
 
-- (IBAction)allowPickingVideoSwitchClick:(UISwitch *)sender {
-    if (!sender.isOn) {
-        [_allowPickingImageSwitch setOn:YES animated:YES];
+#pragma mark - UIAlertViewDelegate
+
+- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
+    if (buttonIndex == 1) { // 去设置界面，开启相机访问权限
+        if (iOS8Later) {
+            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
+        } else {
+            // [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=Privacy&path=Photos"]];
+        }
     }
 }
 
-#pragma mark TZImagePickerControllerDelegate
+#pragma mark - TZImagePickerControllerDelegate
 
 /// User click cancel button
 /// 用户点击了取消
-- (void)imagePickerControllerDidCancel:(TZImagePickerController *)picker {
+// - (void)imagePickerControllerDidCancel:(TZImagePickerController *)picker {
     // NSLog(@"cancel");
-}
+// }
 
 // The picker should dismiss itself; when it dismissed these handle will be called.
 // If isOriginalPhoto is YES, user picked the original photo.
@@ -236,7 +291,7 @@ - (void)imagePickerController:(TZImagePickerController *)picker didFinishPicking
     _isSelectOriginalPhoto = isSelectOriginalPhoto;
     _layout.itemCount = _selectedPhotos.count;
     [_collectionView reloadData];
-    _collectionView.contentSize = CGSizeMake(0, ((_selectedPhotos.count + 2) / 3 ) * (_margin + _itemWH));
+    // _collectionView.contentSize = CGSizeMake(0, ((_selectedPhotos.count + 2) / 3 ) * (_margin + _itemWH));
 }
 
 // If user picking a video, this callback will be called.
@@ -255,7 +310,57 @@ - (void)imagePickerController:(TZImagePickerController *)picker didFinishPicking
         
     // }];
     [_collectionView reloadData];
-    _collectionView.contentSize = CGSizeMake(0, ((_selectedPhotos.count + 2) / 3 ) * (_margin + _itemWH));
+   // _collectionView.contentSize = CGSizeMake(0, ((_selectedPhotos.count + 2) / 3 ) * (_margin + _itemWH));
+}
+
+
+#pragma mark Click Event
+
+- (void)deleteBtnClik:(UIButton *)sender {
+    [_selectedPhotos removeObjectAtIndex:sender.tag];
+    [_selectedAssets removeObjectAtIndex:sender.tag];
+    _layout.itemCount = _selectedPhotos.count;
+    
+    [_collectionView performBatchUpdates:^{
+        NSIndexPath *indexPath = [NSIndexPath indexPathForItem:sender.tag inSection:0];
+        [_collectionView deleteItemsAtIndexPaths:@[indexPath]];
+    } completion:^(BOOL finished) {
+        [_collectionView reloadData];
+    }];
+}
+
+- (IBAction)showTakePhotoBtnSwitchClick:(UISwitch *)sender {
+    if (sender.isOn) {
+        [_showSheetSwitch setOn:NO animated:YES];
+        [_allowPickingImageSwitch setOn:YES animated:YES];
+    }
+}
+
+- (IBAction)showSheetSwitchClick:(UISwitch *)sender {
+    if (sender.isOn) {
+        [_showTakePhotoBtnSwitch setOn:NO animated:YES];
+        [_allowPickingImageSwitch setOn:YES animated:YES];
+    }
+}
+
+- (IBAction)allowPickingOriginPhotoSwitchClick:(UISwitch *)sender {
+    if (sender.isOn) {
+        [_allowPickingImageSwitch setOn:YES animated:YES];
+    }
+}
+
+- (IBAction)allowPickingImageSwitchClick:(UISwitch *)sender {
+    if (!sender.isOn) {
+        [_allowPickingOriginalPhotoSwitch setOn:NO animated:YES];
+        [_showTakePhotoBtnSwitch setOn:NO animated:YES];
+        [_allowPickingVideoSwitch setOn:YES animated:YES];
+    }
+}
+
+- (IBAction)allowPickingVideoSwitchClick:(UISwitch *)sender {
+    if (!sender.isOn) {
+        [_allowPickingImageSwitch setOn:YES animated:YES];
+    }
 }
 
 @end