滑动视图上实现图片(视图)的缩放功能:用到两个滑动视图
UIView pageView = new UIView();
UIScrollView contentScrollView = new UIScrollView();
contentScrollView.ShowsVerticalScrollIndicator = false; contentScrollView.ShowsHorizontalScrollIndicator = false;
contentScrollView.MinimumZoomScale = 0.2f;
contentScrollView.MaximumZoomScale = 3.0f;
contentScrollView.ZoomScale = 1.0f;
contentScrollView.Frame = new CGRect(0 , 0, View.Bounds.Width, View.Bounds.Height);
contentScrollView.ContentSize = new CGSize(View.Bounds.Width, View.Bounds.Height);
contentScrollView.ViewForZoomingInScrollView = delegate (UIScrollView scroll)
{
return pageView;
};
双击手势:实现缩放
public void HandleDoubleTapGesture(UIGestureRecognizer gesture)
{
var scroll = gesture.View.Superview as UIScrollView;
if(scroll != null)
{
var newScale = scroll.ZoomScale * 1.5f;
var zoomRect = zoomRectForScale(newScale, scroll, gesture.LocationInView(gesture.View));
Xamarin.iOS中实现图片双击缩放的滑动视图

这篇博客介绍了如何在Xamarin.iOS应用中使用滑动视图(UIScrollView)和双击手势(UIGestureRecognizer)来实现图片的缩放功能。通过设置滑动视图的最小和最大缩放比例,并定义视图的大小,实现了平滑的滚动体验。双击手势处理方法中,计算新的缩放比例并调整缩放区域,确保用户双击时图片能准确缩放至目标位置。
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