ios 7.1闪存模式don'；行不通

这是我在iphone上更改flash模式的代码

在ios7.0工作环境中：flashmode（0,1，-1）

在ios7.1中不工作：flashmode（0,0,0）

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我以前碰到过那只虫子

问题是，无论ios 7.1中的真实闪存状态是什么，它总是返回

UIImagePickerController CameraFlashModeAuto

。有趣的是，如果您将flash模式设置为

UIImagePickerControllerCameraFlashModeOff

，flash确实会关闭，但如果您询问状态，它仍然是

UIImagePickerControllerCameraFlashModeAuto

所以我通过保持自己的“闪现状态”解决了我的问题。单击后，我手动更改自己的状态，并且从不信任发送回的状态，而是UIImagePickerController

@property (nonatomic) UIImagePickerControllerCameraFlashMode flashMode;

单击按钮时：

       if (self.flashMode == UIImagePickerControllerCameraFlashModeAuto) {  
            //toggle your button to "on"
            self.flashMode = UIImagePickerControllerCameraFlashModeOn;
        }else if (self.flashMode == UIImagePickerControllerCameraFlashModeOn){  
            //toggle your button to "Off"
            self.flashMode = UIImagePickerControllerCameraFlashModeOff;
        }else if (self.flashMode == UIImagePickerControllerCameraFlashModeOff){ 
            //toggle your button to "Auto"
            self.flashMode = UIImagePickerControllerCameraFlashModeAuto;
        }

对我来说不管用

       if (self.flashMode == UIImagePickerControllerCameraFlashModeAuto) {  
            //toggle your button to "on"
            self.flashMode = UIImagePickerControllerCameraFlashModeOn;
        }else if (self.flashMode == UIImagePickerControllerCameraFlashModeOn){  
            //toggle your button to "Off"
            self.flashMode = UIImagePickerControllerCameraFlashModeOff;
        }else if (self.flashMode == UIImagePickerControllerCameraFlashModeOff){ 
            //toggle your button to "Auto"
            self.flashMode = UIImagePickerControllerCameraFlashModeAuto;
        }