Your application has presented a UIAlertController

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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iPad上UIAlertController style为 UIAlertControllerStyleActionSheet会崩溃

最简单的方法就是判断一下当前设备是否为iPad

如果是iPad设置UIAlertController style为UIAlertControllerStyleAlert