修复iOS8以前系统，点击拍照崩溃的问题

TZImagePickerController.podspec

 Pod::Spec.new do |s|
   s.name         = "TZImagePickerController"
-  s.version      = "1.2.3"
+  s.version      = "1.3.1"
   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 => "1.2.3" }
+  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.3.1" }
   s.requires_arc = true
   s.resources    = "TZImagePickerController/TZImagePickerController/*.{png,xib,nib,bundle}"
   s.source_files = "TZImagePickerController/TZImagePickerController/*.{h,m}"

TZImagePickerController/TZImagePickerController/TZPhotoPickerController.m

@@ -47,12 +47,12 @@ static CGSize AssetGridThumbnailSize;
         _imagePickerVc.navigationBar.barTintColor = self.navigationController.navigationBar.barTintColor;
         _imagePickerVc.navigationBar.tintColor = self.navigationController.navigationBar.tintColor;
         UIBarButtonItem *tzBarItem, *BarItem;
-        if (iOS8Later) {
-            tzBarItem = [UIBarButtonItem appearanceWhenContainedIn:[TZImagePickerController class], nil];
-            BarItem = [UIBarButtonItem appearanceWhenContainedIn:[UIImagePickerController class], nil];
-        } else {
+        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];