最近项目中遇到了SDK内需要横屏，而工程必须竖屏的情况，解决方法有两个：
1.最保险的方法，工程AppDelegate.h添加

@property (nonatomic, strong) NSNumber* allowRotation;  // 横竖屏
//AppDelegate.m处实现
//////横屏方式
-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
//    NSLog(@"application");
//    if ([_allowRotation boolValue]) {
//        return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft;
//    }else{
//        return (UIInterfaceOrientationMaskPortrait);
//    }
//}

2.SDK捕获AppDelegate方法，只要工程实现了-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window代理方法就可以了。方法没完善，就只写主要部分了。

//调用处
[self hookMehod:@selector(SDKApplication:supportedInterfaceOrientationsForWindow:) andDef:@selector(defaultApplication:supportedInterfaceOrientationsForWindow:) andNew:@selector(application:supportedInterfaceOrientationsForWindow:)];
//方法：
-(void)hookMehod:(SEL)oldSEL andDef:(SEL)defaultSEL andNew:(SEL)newSEL {
    
    Class oldClass = objc_getClass([@"AppDelegate" UTF8String]);
    Class newClass = [self class];
    id delegate = [UIApplication sharedApplication].delegate;
    SEL selector = NSSelectorFromString(@"application:supportedInterfaceOrientationsForWindow:");
    if ([delegate respondsToSelector:selector]) {
        NSLog(@"respondsToSelector=YES");
        //把方法加给原Class
        class_addMethod(oldClass, newSEL, class_getMethodImplementation(newClass, newSEL), nil);
        class_addMethod(oldClass, oldSEL, class_getMethodImplementation(newClass, defaultSEL),nil);
        
        Method oldMethod = class_getInstanceMethod(oldClass, oldSEL);
        assert(oldMethod);
        Method newMethod = class_getInstanceMethod(oldClass, newSEL);
        assert(newMethod);
        method_exchangeImplementations(oldMethod, newMethod);
    }else{
        NSLog(@"AppDelegate未实现application:supportedInterfaceOrientationsForWindow:");
//此处强制添加实现的方法，我没加。有兴趣添加的麻烦评论区告诉我下。
    }
}

-(UIInterfaceOrientationMask)defaultApplication:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    NSLog(@"defaultApplication");
    return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft;
}

-(UIInterfaceOrientationMask)SDKApplication:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    NSLog(@"SDKDelegatesetAllowRotation");
    return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft;
}