Question

我的图片尺寸为480x360，并显示在UIImageview中，框架(0, 0, 320, 568)显示为aspectfill。

当我触摸图片视图时，位置显示为(150,120)。如何以原始图片(480x360)格式映射此位置？

由于

Answer 1

您只需计算比例并将其应用于触摸位置点。

CGFloat _x = imageView.image.size.width / imageView.frame.size.width;
CGFloat _y = imageView.image.size.height / imageView.frame.size.height;

//assuming p - is CGPoint received from Touch event
CGPoint locationInImageView = CGPointMake(p.x * _x, p.y * _y);

Answer 2

在Swift中查找触摸的像素位置：

guard let image = imageView.image else {
    return
}

let x = image.size.width / imageView.frame.size.width
let y = image.size.height / imageView..frame.size.height

// Assuming touchLocation is CGPoint received from Touch event
var touchLocation: CGPoint
let locationInImageView = CGPoint(x: touchLocation.x * x, y: touchLocation.y * y);

如何在ios中找到原始图像中的像素位置

2 个答案: