iphone - 在 iphone sdk 中使用 DEFacebookComposeViewController 的白色背景问题

Question

我正在使用 DEFacebookComposeViewController 在 Facebook 上共享。

我在一个视图控制器中遇到问题，它将视图的背景颜色更改为白色而不是透明的黑色背景。

Answer 1

无需在代码中的任何地方进行更改，只需在实现模块中替换此代码即可

self.modalPresentationStyle = UIModalPresentationCurrentContext;

和

appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext;

你的工作将完成。

Answer 2

我设法解决了这个问题。您需要取消注释以下文件中的代码：“DEFacebookComposeViewController.h”

只需替换以下代码：

• (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated];

  // Take a snapshot of the current view, and make that our background after our view animates into place.
  // This only works if our orientation is the same as the presenting view.
  // If they don't match, just display the gray background.
    if (self.interfaceOrientation == self.fromViewController.interfaceOrientation) {
  //        UIImage *backgroundImage = [self captureScreen];
  //        self.backgroundImageView = [[[UIImageView alloc]               initWithImage:backgroundImage] autorelease];
     }
     else {
     //            self.backgroundImageView = [[[UIImageView alloc] initWithFrame:self.fromViewController.view.bounds] autorelease];
  }
        //    self.backgroundImageView.autoresizingMask = UIViewAutoresizingNone;
  //    self.backgroundImageView.alpha = 0.0f;
  //    self.backgroundImageView.backgroundColor = [UIColor lightGrayColor];
  //    [self.view insertSubview:self.backgroundImageView atIndex:0];
  
  // Now let's fade in a gradient view over the presenting view.
     self.gradientView = [[[DEFacebookGradientView alloc] initWithFrame:[UIApplication sharedApplication].keyWindow.bounds] autorelease];
     self.gradientView.autoresizingMask = UIViewAutoresizingNone;
     self.gradientView.transform = self.fromViewController.view.transform;
     self.gradientView.alpha = 0.0f;
     self.gradientView.center = [UIApplication sharedApplication].keyWindow.center;
     [self.fromViewController.view addSubview:self.gradientView];
     [UIView animateWithDuration:0.3f
               animations:^ {
                   self.gradientView.alpha = 1.0f;
               }];    
  
     self.previousStatusBarStyle = [UIApplication sharedApplication].statusBarStyle;
     [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:YES]; 
  
     [self updateFramesForOrientation:self.interfaceOrientation];
  
        }
  

使用此代码：

   - (void)viewWillAppear:(BOOL)animated
   {
       [super viewWillAppear:animated];

    // Take a snapshot of the current view, and make that our background after our view animates into place.
    // This only works if our orientation is the same as the presenting view.
    // If they don't match, just display the gray background.
if (self.interfaceOrientation == self.fromViewController.interfaceOrientation) {
    UIImage *backgroundImage = [self captureScreen];
    self.backgroundImageView = [[[UIImageView alloc] initWithImage:backgroundImage] autorelease];
}
else {
    self.backgroundImageView = [[[UIImageView alloc] initWithFrame:self.fromViewController.view.bounds] autorelease];
}
self.backgroundImageView.autoresizingMask = UIViewAutoresizingNone;
self.backgroundImageView.alpha = 0.0f;
self.backgroundImageView.backgroundColor = [UIColor lightGrayColor];
[self.view insertSubview:self.backgroundImageView atIndex:0];

    // Now let's fade in a gradient view over the presenting view.
self.gradientView = [[[DEFacebookGradientView alloc] initWithFrame:[UIApplication sharedApplication].keyWindow.bounds] autorelease];
self.gradientView.autoresizingMask = UIViewAutoresizingNone;
self.gradientView.transform = self.fromViewController.view.transform;
self.gradientView.alpha = 0.0f;
self.gradientView.center = [UIApplication sharedApplication].keyWindow.center;
[self.fromViewController.view addSubview:self.gradientView];
[UIView animateWithDuration:0.3f
                 animations:^ {
                     self.gradientView.alpha = 1.0f;
                 }];    

self.previousStatusBarStyle = [UIApplication sharedApplication].statusBarStyle;
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:YES]; 

[self updateFramesForOrientation:self.interfaceOrientation];

   }

如果他们发现类似的问题，希望这对其他人有帮助。

谢谢。