iphone - Objective-C: How can I freeze the screen and add loading

I made an application which download lots of data and I want to add some animation why it is loading and freeze the screen. I have already find function which work but it only freeze button functio

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ios app stuck on splashscreen now . if i remove this plugin all working fine. · Issue #95 · ionic-team/cordova-plugin-ionic-webview · GitHub

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