image - App getting heavy while saving data to iphone directory,,, -

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I am saving data to iFile directory which I have created in PNG format, but my app is getting heavier Should i do

It seems that the options are quite clear: either delete the data from the document directory which you don? Is not required, or use a file format with more compression than PNG (eg, lossy JPEG). You have to compromise somewhere, so what's better for you App: By keeping more compression on images, or lossless images, but by automatically deleting files older than a certain date (or manually removing the user Offer of choice) etc.

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