Para habilitar transparência em um modal usando nativescript, no módulo page.ios.js, altere o método _showNativeModalView da seguinte maneira:
As seguintes linhas
page.ios.js -> _showNativeModalView
_super.prototype._raiseShowingModallyEvent.call(this);
parent.ios.presentViewControllerAnimatedCompletion(this._ios, utils.ios.MajorVersion >= 7, null);
var transitionCoordinator = parent.ios.transitionCoordinator();
if (transitionCoordinator) {
UIViewControllerTransitionCoordinator.prototype.animateAlongsideTransitionCompletion.call(transitionCoordinator, null, function () { return _this._raiseShownModallyEvent(); });
}
else {
this._raiseShownModallyEvent();
}
Para
page.ios.js -> _showNativeModalView
_super.prototype._raiseShowingModallyEvent.call(this);
var that = this
this._ios.providesPresentationContextTransitionStyle = true;
this._ios.definesPresentationContext = true;
this._ios.modalPresentationStyle = UIModalPresentationOverFullScreen;
this._ios.view.backgroundColor = UIColor.clearColor(); // can be with 'alpha'
parent.ios.presentViewControllerAnimatedCompletion(this._ios, utils.ios.MajorVersion >= 8, function(){
that._ios.modalPresentationStyle = UIModalPresentationCurrentContext;
that._raiseShownModallyEvent(parent, context, closeCallback)
});