获取相册时候增加了一个判断，避免崩溃

获取相册时候增加了一个判断，避免崩溃

TZImagePickerController/TZImagePickerController/TZImageManager.m

@@ -125,7 +125,11 @@ static CGFloat TZScreenScale;
             PHFetchResult *fetchResult = [PHAsset fetchAssetsInAssetCollection:collection options:option];
             if (fetchResult.count < 1) continue;
             if ([collection.localizedTitle isEqualToString:@"My Photo Stream"] || [collection.localizedTitle isEqualToString:@"我的照片流"]) {
-                [albumArr insertObject:[self modelWithResult:fetchResult name:collection.localizedTitle] atIndex:1];
+                if (albumArr.count) {
+                    [albumArr insertObject:[self modelWithResult:fetchResult name:collection.localizedTitle] atIndex:1];
+                } else {
+                    [albumArr addObject:[self modelWithResult:fetchResult name:collection.localizedTitle]];
+                }
             } else {
                 [albumArr addObject:[self modelWithResult:fetchResult name:collection.localizedTitle]];
             }
@@ -141,7 +145,11 @@ static CGFloat TZScreenScale;
             if ([name isEqualToString:@"Camera Roll"] || [name isEqualToString:@"相机胶卷"]) {
                 [albumArr insertObject:[self modelWithResult:group name:name] atIndex:0];
             } else if ([name isEqualToString:@"My Photo Stream"] || [name isEqualToString:@"我的照片流"]) {
-                [albumArr insertObject:[self modelWithResult:group name:name] atIndex:1];
+                if (albumArr.count) {
+                    [albumArr insertObject:[self modelWithResult:group name:name] atIndex:1];
+                } else {
+                    [albumArr addObject:[self modelWithResult:group name:name]];
+                }
             } else {
                 [albumArr addObject:[self modelWithResult:group name:name]];
             }