fix: don't access album cover when album is empty

cf2c0f1a · yuzheng · 3357eab3 · cf2c0f1a
Commit cf2c0f1a authored Aug 27, 2019 by yuzheng
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TZImagePickerController/TZImagePickerController/TZImageManager.m ...PickerController/TZImagePickerController/TZImageManager.m +3 -0

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--- a/TZImagePickerController/TZImagePickerController/TZImageManager.m
+++ b/TZImagePickerController/TZImagePickerController/TZImageManager.m
@@ -412,6 +412,9 @@ static dispatch_once_t onceToken;
    if (!self.sortAscendingByModificationDate) {
        asset = [model.result firstObject];
    }
+    if (!asset) {
+        return -1;
+    }
    return [[TZImageManager manager] getPhotoWithAsset:asset photoWidth:80 completion:^(UIImage *photo, NSDictionary *info, BOOL isDegraded) {
        if (completion) completion(photo);
    }];