iphone - Subviews on UIImagePicker? -


i wondering: in apple's "photos" app, when user wishes share more 1 photo, or can tap on individual thumbnails, , check in red circle appear on top of each one, indicating they've been selected sharing. there way mimic behavior in our apps? somehow inserting subviews on thumbnails, perhaps...? in advance.

you can't affect thumbnail views on uiimagepicker, you'll have implement yourself. should pretty straightforward:

  • uiscrollview container
  • a uiview descendant each tile, containing
    • uiimageview subview display thumbnail
    • uibutton clickable checkmark

make sure create thumbnails of images , cache them, , don't shy away uiimageview - heavily optimized.

there great sample app in wwdc sample code re: uiscrollview should give starting point.


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