从 iPad 中的 UIActionSheet 为 uiimagepickercontrollersourcetypephotolibrary 显示 UIImagePickerViewController答案

【问题标题】：Display UIImagePickerViewController for uiimagepickercontrollersourcetypephotolibrary from UIActionSheet in IPad从 iPad 中的 UIActionSheet 为 uiimagepickercontrollersourcetypephotolibrary 显示 UIImagePickerViewController
【发布时间】：2012-04-02 07:08:20
【问题描述】：

我有一个UIActionSheet，它可以选择从相机或照片库中选择图像。为此，我采用了 imagePickerViewController。对于相机，它工作得非常好。但不适用于照片库。

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {

    if (buttonIndex == 0) 
    {

        imgController = [[UIImagePickerController alloc] init];
        imgController.allowsEditing = YES;
        imgController.sourceType =  UIImagePickerControllerSourceTypeCamera;   
        imgController.delegate=self;
        [self presentModalViewController:imgController animated:YES];

    } 
    else if (buttonIndex == 1) 
    {

        if ([self.popoverController isPopoverVisible]) {
            [self.popoverController dismissPopoverAnimated:YES];
            [popoverController release];
        } else {
            if ([UIImagePickerController isSourceTypeAvailable:
                 UIImagePickerControllerSourceTypeSavedPhotosAlbum])
            {
                UIImagePickerController *imagePicker =
                [[UIImagePickerController alloc] init];
                imagePicker.delegate = self;
                imagePicker.sourceType =
                UIImagePickerControllerSourceTypePhotoLibrary;
                imagePicker.allowsEditing = NO;

                self.popoverController = [[UIPopoverController alloc]
                                          initWithContentViewController:imagePicker];

                self.popoverController.delegate = self;

                [self.popoverController setPopoverContentSize:CGSizeMake(500, 500)];

                [self.popoverController presentPopoverFromRect:self.view.frame 
                                                          inView:self.view
                                        permittedArrowDirections:UIPopoverArrowDirectionAny 
                                                        animated:YES];


                [imagePicker release];
            }
        }


    } 

}

在触摸照片库选项时，会在视图顶部创建一个小的 popupViewController，但它非常小。为什么 popupViewController 太小了？有没有其他方法可以为uiimagepickercontrollersourcetypephotolibrary 显示UIImagePickerViewController？

【问题讨论】：

根据需要更改 presentPopoverFromRect 大小

标签： iphone ipad uiimagepickercontroller uipopovercontroller uiactionsheet

【解决方案1】：

试试这个例子

   CGRect popoverRect = [self.view convertRect:[self.view frame] 
                                       fromView:[self.view superview]];

    popoverRect.size.width = MIN(popoverRect.size.width, 80) ; 
    popoverRect.origin.x  = popoverRect.origin.x+150; 

    [self.popoverController 
     presentPopoverFromRect:popoverRect 
     inView:self.view 
     permittedArrowDirections:UIPopoverArrowDirectionLeft
     animated:YES];

【讨论】：

【解决方案2】：

尝试不要为弹出窗口中的UIImagePickerViewController 设置PopoverContentSize - 我认为它会自动处理！此外，presentPopoverFromRect: 中的CGRect 似乎不正确，因为您正在传递view 的框架，该框架转换为大致指向屏幕中心的弹出框。您可能希望将其设置为显示 UIActionSheet! 的按钮的框架！

【讨论】：

【解决方案3】：

我认为你传入的rect应该更小，而不是整个视图的大小：

CGRect popFrom = CGRectMake (CGPointMake(50,50),10,10);
[self.popoverController presentPopoverFromRect:popFrom 
                                                          inView:self.view
                                        permittedArrowDirections:UIPopoverArrowDirectionAny 
                                                        animated:YES];

【讨论】：

哈哈，深夜的错误，感谢您指出...我已经解决了，很高兴能帮到您:)

【解决方案4】：

试试这个：

 imagePickerController = [[UIImagePickerController alloc] init];
 imagePickerController.delegate = self;
 imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
 [self presentModalViewController:imagePickerController animated:YES];

【讨论】：