Question

这是我在iphone上更改闪光模式的代码。

在ios7.0中有效：flashmode（0,1，-1）

在ios7.1中，不能正常工作：flashmode（0,0,0）

//UIImagePickerControllerCameraFlashModeOff  = -1,
//UIImagePickerControllerCameraFlashModeAuto = 0,
//UIImagePickerControllerCameraFlashModeOn   = 1

NSInteger flashMode = self.pickerReference.cameraFlashMode;

NSLog(@"flashmode %i",flashMode);

if (flashMode == UIImagePickerControllerCameraFlashModeAuto) {
    [(UIButton *)sender setImage:[UIImage imageNamed:@"flashYesComposeButton.png"] forState:UIControlStateNormal];
    self.pickerReference.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
}

else if (flashMode == UIImagePickerControllerCameraFlashModeOn) {
    [(UIButton *)sender setImage:[UIImage imageNamed:@"flashNoComposeButton.png"] forState:UIControlStateNormal];
    self.pickerReference.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;
}

else if (flashMode == UIImagePickerControllerCameraFlashModeOff)
{
    [(UIButton *)sender setImage:[UIImage imageNamed:@"flashAutoComposeButton.png"] forState:UIControlStateNormal];
    self.pickerReference.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
}

Answer 1

我在

之前遇到了那个bug

问题在于，无论ios 7.1中的实际闪存状态是什么，它总是返回UIImagePickerControllerCameraFlashModeAuto。有趣的是，如果你将闪光模式设置为UIImagePickerControllerCameraFlashModeOff，闪光灯将真的关闭，但如果你问状态，它仍然是UIImagePickerControllerCameraFlashModeAuto。

所以我通过保留自己的“flashState”解决了我的问题。单击时，我手动更改自己的状态，并且永远不会相信发回的那个但是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;
        }

ios 7.1闪光模式不起作用

1 个答案: