c# - iOS Fit Image to Screen -


i have image 646x289 trying fit in screen respect aspect ratio.

here current approach:

controller:

public override void viewdidlayoutsubviews() {     base.viewdidlayoutsubviews();     _imnlogo.contentmode = uiviewcontentmode.scaleaspectfit;     _imnlogo.sizetofit();     _imnlogo.frame = new cgrect(         view.bounds.left + 2 * globals.margingrid,         view.bounds.top + globals.margingrid,         _scaledimage.size.width, _scaledimage.size.height); }  public override void loadview() {     base.loadview();     _scaledimage = maxresizeimage(         uiimage.fromfile("imn_logo.png"), (float) view.bounds.width, (float) view.bounds.height);      _imnlogo = new uiimageview(_scaledimage);     view.addsubview(_imnlogo); }  public uiimage maxresizeimage(uiimage sourceimage, float maxwidth, float maxheight) {     var sourcesize = sourceimage.size;     var maxresizefactor = math.max(maxwidth / sourcesize.width, maxheight / sourcesize.height);     if (maxresizefactor > 1) return sourceimage;      var width = maxresizefactor * sourcesize.width;     var height = maxresizefactor * sourcesize.height;     uigraphics.beginimagecontext(new sizef((float) width, (float) height));     sourceimage.draw(new rectanglef(0, 0, (float) width, (float) height));     var resultimage = uigraphics.getimagefromcurrentimagecontext();     uigraphics.endimagecontext();     return resultimage; }

when loads, image way large , doesn't fit in screen.

i constructing of interfaces in c# (using xamarin) need able using frames , bounds.

use contentmode of uiimageview control how image scaled , can skip manual resizing:

public override void loadview() {     base.loadview();     _imnlogo = new uiimageview(uiimage.fromfile("imn_logo.png"));     _imnlogo.frame = view.frame;     _imnlogo.contentmode = uiviewcontentmode.scaleaspectfill;     view.addsubview(imageview);     view.sendsubviewtoback(imnlogo); // if want place other `view`s on top of logo... }

ref: https://developer.apple.com/reference/uikit/uiviewcontentmode


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