Your application has presented a UIAlertController

Thread 1: "Your application has presented a UIAlertController (<UIAlertController: 0x7f9f03960200>) of style UIAlertControllerStyleActionSheet from ***. The modalPresentationStyle of a UIAlertController with this style is UIModalPresentationPopover. You must provide location information for this popover through the alert controller's popoverPresentationController. You must provide either a sourceView and sourceRect or a barButtonItem.  If this information is not known when you present the alert controller, you may provide it in the UIPopoverPresentationControllerDelegate method -prepareForPopoverPresentation."

简单一点来说就是在iPadUIAlertController styleUIAlertControllerStyleActionSheet会崩溃


如果是iPad设置UIAlertController styleUIAlertControllerStyleAlert