iPhone 5的低光增亮模式 [英] iPhone 5's low light boost mode

问题描述

有没有人能够得到iPhone 5的新的低光提升模式在他们的自定义相机应用程序工作？我试过下面的代码，但没有注意到没有什么区别 - 而本机相机应用程序显着提高了亮度。

Has anyone been able to get the iPhone 5's new low light boost mode to work in their custom camera app? I tried the following code, but noticed no difference - whereas the native camera app significantly boosted the brightness.

if ([[captureManager backFacingCamera] isLowLightBoostEnabled]) {

    [[captureManager backFacingCamera] automaticallyEnablesLowLightBoostWhenAvailable];
}

推荐答案

$ c> lockForConfiguration ，根据docs（以及头文件）：

You need to lockForConfiguration, according to the docs (well, the header file):

if ([[self backFacingCamera] respondsToSelector:@selector(isLowLightBoostSupported)]) {
  if ([[self backFacingCamera] lockForConfiguration:nil]) {
    if ([self backFacingCamera].isLowLightBoostSupported)
      [self backFacingCamera].automaticallyEnablesLowLightBoostWhenAvailable = YES;
    [[self backFacingCamera] unlockForConfiguration];
  }
}

此外， isLowLightBoostEnabled 告诉你低光是否实际上是提升，而不是它是否可以。这是 isLowLightBoostSupported 选择器，如上所述（只有iOS 6设备响应）。

Also, isLowLightBoostEnabled tells you whether or not the low light is actually being boosted, not whether it can be. That's the isLowLightBoostSupported selector, as above (to which only iOS 6 devices respond).

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