如何在Swift中获得前置摄像头? [英] How to get the front camera in Swift?
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问题描述
我正在尝试使用实时视图获取前置摄像头。我能够使用后置摄像头:
I am trying to get the front camera with live view. I am able to get the back camera using:
var backCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
但我似乎无法找到如何获得前置摄像头。如何更改上面的代码才能使用前置摄像头?
But I can't seem to find how to get the front camera. How can I change the code above to use the front camera?
推荐答案
以下是我的一个项目的工作示例,以获取前置摄像头。这是目标-c但经过验证可以很容易地转换为swift。
Here is a working example from one of my projects to get the front camera. This is in objective-c but proven to work and easy enough to convert to swift.
NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
AVCaptureDevice *captureDevice = nil;
for (AVCaptureDevice *device in videoDevices){
if (device.position == AVCaptureDevicePositionFront){
captureDevice = device;
break;
}
}
在Swift 3.2 +中:
And in Swift 3.2+:
if let videoDevices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) {
var captureDevice: AVCaptureDevice
for device in videoDevices {
if let device = device as? AVCaptureDevice {
if device.position == AVCaptureDevicePosition.front {
captureDevice = device
break
}
}
}
}
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