Supported orientations has no common orientation with the application, and [UIAlertController shouldAutorotate] is returning YES

某一个页面横屏时会出现崩溃的问题描述，原因是当你在AppDelegate中返回的设备方向是UIInterfaceOrientationMaskLandscapeLeft.但是你在视图控制器中返回支持自动旋转。就会抛出此异常。

解决方法 重写UIAlertContrller 的shouldAutorotate 方法，

#import <UIKit/UIKit.h>

@interface UIAlertController (Rotation)
- (BOOL)shouldAutorotate;
@end

#import "UIAlertController+Rotation.h"

@implementation UIAlertController (Rotation)
- (BOOL)shouldAutorotate
{
    return NO;
}
@end

即可

by:初光夫