We are devoloping app for android and ios
dispalying images in android is perfect, while in ios is faint.
how to rectify this issue
Off the top of my head, it could be that the image format isn't what iOS wants/needs to be a clear image, or it could be CSS.
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Fuad, what tool are you using? If it's an Adobe tool, but not ColdFusion, do note that this is a CF forum, so you may not get the help you'd want for some other Adobe tool. See the forums for all tools offered at https://community.adobe.com/.