这是
Swift 2.我似乎无法找到任何相关内容.我收到了错误
Cannot invoke 'lockForConfiguration' with an argument list of type '(() -> ())'
在这里的第二行.
if let device = captureDevice {
device.lockForConfiguration() {
device.videoZoomFactor = 1.0 + CGFloat(ratioValue)
device.unlockForConfiguration()
}
print(ratioValue)
}
解决方法
在Swift 2中,方法lockForConfiguration不接受任何参数,而是可以抛出NSError.您应该将它包装在do-try-catch语句中.
do {
try device.lockForConfiguration()
} catch {
// handle error
return
}
// When this point is reached,we can be sure that the locking succeeded
device.videoZoomFactor = 1.0 + CGFloat(ratioValue)
device.unlockForConfiguration()
