How to center scrollView content???
I have an imageView placed in a scrollView. I am trying to have that image be centered on the screen and have the pinch zoom expand from that center point.
Right now, the image is at the top of the screen and seems to be anchored (and the zoom expands from) to the top left corner.
I have tried using the "anchorPoint", "contentOffset", and "center" parameters to no avail. I have "anchorPoint" set in my code below, but changing those values seems to have no effect.
Can someone explain how I might achieve centering this thing?
Here is my code:
var mapView = Titanium.UI.createScrollView({
width:320,
height:420,
top:0,
left:0,
backgroundColor:'#333',
anchorPoint:{x:0.5,y:0.5},
contentWidth:'auto',
contentHeight:'auto',
minZoomScale:0.1,
maxZoomScale:1,
disableBounce:true
});
function centerMap(){
mapView.zoomScale = 0.1;
};
4 Answers
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Intro: I have had a ton of issues with
scrollView's, just search in the Q&A and you'll see many people do. I still haven't figured out how positioningscrollView's and its contents work. ThecontentOffsetproperty did nothing for me as well.Possible Solution: As Marcus says, set the
topandleftproperties of the image to:top:(Ti.Platform.displayCaps.platformHeight*0.5), left:(Ti.Platform.displayCaps.platformWidth*0.5),If that doesn't work, the next step would be to set the
widthandheightproperties of theimageView. The step after that would be to set thecontentWidthandcontentHeightof the image view to the dimensions of the image.Note that it has been my experience that every automatically centers for me, but I'm using Android 1.6 & Ti Mobile 1.6.1. So, I always start with no properties set, then see if setting dimensions will work, then play with the positioning properties (top, left, offset, etc) to see if anything will change using that.
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I'm having that exact same issue right now and omitting the top and left did not help. Did you ever solve this problem??
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Try adding:
top:0, bottom:0That should center it in the middle vertically.
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I think if you don't define a 'top' and a 'left' if would naturally centre itself in the middle of your screen.