如何打开/关闭iPhone相机闪光灯swift 2？
如何打开/关闭iPhone相机闪光灯swift 2？
提问于 2015-11-08 01:02:00
我正在寻找如何打开/关闭iPhone的照相闪光灯，我发现了这个：
@IBAction func didTouchFlashButton(sender: AnyObject) {
let avDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
// check if the device has torch
if avDevice.hasTorch {
// lock your device for configuration
avDevice.lockForConfiguration(nil)
// check if your torchMode is on or off. If on turns it off otherwise turns it on
if avDevice.torchActive {
avDevice.torchMode = AVCaptureTorchMode.Off
} else {
// sets the torch intensity to 100%
avDevice.setTorchModeOnWithLevel(1.0, error: nil)
}
// unlock your device
avDevice.unlockForConfiguration()
}
}我确实收到了两个问题，其中一个是：
avDevice.lockForConfiguration(nil)另一个在线上：
avDevice.setTorchModeOnWithLevel(1.0, error:nil)这两个问题都与异常处理有关，但我不知道如何解决它们。
回答 5
Stack Overflow用户
回答已采纳
发布于 2015-11-16 23:05:18
@IBAction func didTouchFlashButton(sender: UIButton) {
let avDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
// check if the device has torch
if avDevice.hasTorch {
// lock your device for configuration
do {
let abv = try avDevice.lockForConfiguration()
} catch {
print("aaaa")
}
// check if your torchMode is on or off. If on turns it off otherwise turns it on
if avDevice.torchActive {
avDevice.torchMode = AVCaptureTorchMode.Off
} else {
// sets the torch intensity to 100%
do {
let abv = try avDevice.setTorchModeOnWithLevel(1.0)
} catch {
print("bbb")
}
// avDevice.setTorchModeOnWithLevel(1.0, error: nil)
}
// unlock your device
avDevice.unlockForConfiguration()
}
}Stack Overflow用户
发布于 2018-09-18 03:30:26
Swift 4版本，改编自Ivan Slavov的答案。如果你想变得花哨，"TorchMode.auto“也是一个选择。
@IBAction func didTouchFlashButton(_ sender: Any) {
if let avDevice = AVCaptureDevice.default(for: AVMediaType.video) {
if (avDevice.hasTorch) {
do {
try avDevice.lockForConfiguration()
} catch {
print("aaaa")
}
if avDevice.isTorchActive {
avDevice.torchMode = AVCaptureDevice.TorchMode.off
} else {
avDevice.torchMode = AVCaptureDevice.TorchMode.on
}
}
// unlock your device
avDevice.unlockForConfiguration()
}
}Stack Overflow用户
发布于 2015-11-18 15:20:22
由于某些原因，"avDevice.torchActive“总是假的，即使在手电筒打开的时候也是如此，这使得它无法关闭，但我通过声明一个布尔值来修复它，布尔值最初设置为false，每次打开闪光灯时，布尔值都设置为true。
var on: Bool = false
@IBAction func didTouchFlashButton(sender: UIButton) {
let avDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
// check if the device has torch
if avDevice.hasTorch {
// lock your device for configuration
do {
let abv = try avDevice.lockForConfiguration()
} catch {
print("aaaa")
}
// check if your torchMode is on or off. If on turns it off otherwise turns it on
if on == true {
avDevice.torchMode = AVCaptureTorchMode.Off
on = false
} else {
// sets the torch intensity to 100%
do {
let abv = try avDevice.setTorchModeOnWithLevel(1.0)
on = true
} catch {
print("bbb")
}
// avDevice.setTorchModeOnWithLevel(1.0, error: nil)
}
// unlock your device
avDevice.unlockForConfiguration()
}}
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原文链接：
https://stackoverflow.com/questions/33585353
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