使用 Swift 将相机焦点设置在点击点上 [英] Set Camera Focus On Tap Point With Swift

问题描述

用于快速使用相机的 API 似乎有所不同，我很难将相机聚焦在一个点上.当用户点击屏幕时，我希望相机聚焦在该点上

The API for using the camera in swift seems a but different and I am having a hard time focusing the camera on a point. When the user taps the screen I want the camera to focus on that point

这是我的代码:

 func focusCamera(point:CGPoint)
    {
        var screenRect:CGRect = bounds
        var focusX = Float(point.x/screenRect.width)
        var focusY = Float(point.y/screenRect.height)

        _currentDevice.lockForConfiguration(nil)
        _currentDevice.setFocusModeLockedWithLensPosition(focusX)
        {
            time in
            self._currentDevice.unlockForConfiguration()
        }

        _currentDevice.setFocusModeLockedWithLensPosition(focusY)
        {
                time in
                self._currentDevice.unlockForConfiguration()
        }
    }

但它似乎不起作用.

欢迎提出任何建议！

推荐答案

其实很简单:

_currentDevice.lockForConfiguration(nil)
_currentDevice.focusPointOfInterest = tap.locationInView(self)
_currentDevice.unlockForConfiguration()

这篇关于使用 Swift 将相机焦点设置在点击点上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！