UIImagePickerController和ActionSheet在ipad上的问题.md

2018-05-24

UIImagePickerController在ipad和iphone上使用有些不同。

ipad上：

source为camera：可以用popover或者FullScreen。

其他必须为popover，否则会抛出异常。

UIAlertController为ActionSheet时，在ipad上必须用popover。

适配代码如下：

UIImagePickerController *pic = [[UIImagePickerController alloc] init];
pic.sourceType = UIImagePickerControllerSourceTypeCamera;
pic.modalPresentationStyle = UIModalPresentationPopover;
pic.delegate = weakSelf;
UIPopoverPresentationController *popover = pic.popoverPresentationController;
if (popover) {
    popover.sourceView = v;
    popover.sourceRect = v.bounds;
    popover.permittedArrowDirections = UIPopoverArrowDirectionAny;
}
[weakSelf presentViewController:pic animated:YES completion:nil];

UIPopoverPresentationController *popover = alertController.popoverPresentationController;
if (popover) {
    popover.sourceView = v;
    popover.sourceRect = v.bounds;
    popover.permittedArrowDirections = UIPopoverArrowDirectionAny;
}