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我有一張646x289的圖像,我試圖在屏幕寬高比方面適合它。iOS適合屏幕的圖像
這是我目前的做法:
控制器:
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;
}
當這種負載,形象的方式過大,不適合在屏幕上。我正在用C#構建我的所有接口(使用Xamarin),所以我需要能夠使用框架和邊界來實現這一點。
這是我一直在尋找的答案,非常感謝你很多先生! – kformeck
@kformeck np,很高興它幫助...很容易,然後做一個調整自己,它是由iOS加速和緩存..... – SushiHangover