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共享屏幕RPSystemBroadcastPickerView无法自动消失

iOS共享屏幕需要唤起系统的RPSystemBroadcastPickerView，开始共享倒计时结束后RPSystemBroadcastPickerView无法自动消失。

问题原因

iOS共享屏幕需要依赖系统提供的Replaykit框架，开启共享时需要弹出系统的RPSystemBroadcastPickerView，由于RPSystemBroadcastPickerView受系统限制，我们无法通过removeFromSuperview、hidden等方式隐藏，所以需要采用其他方式。

解决方法

观察弹出视图的方式是presentViewController，所以我们可以通过Method Swizzling交换系统的presentViewController方法，从而拿到RPSystemBroadcastPickerView所在的ViewController，在需要的时机调用dismissViewControllerAnimated即可。此方式不支持iOS14及以上系统，如果系统是iOS14及以上，则采用Scheme方式。示例代码如下：

iOS14以下：

#import "UIViewController+XYSwizzling.h"
#import <objc/runtime.h>
#import "XYSDKManager.h"

@implementation UIViewController (XYSwizzling)
+ (void)load {
    [self swizzleSelector:@selector(presentViewController:animated:completion:) withAnotherSelector:@selector(xy_presentViewController:animated:completion:)];
}

+ (void)swizzleSelector:(SEL)originalSelector withAnotherSelector:(SEL)swizzledSelector
{
    Class aClass = [self class];

    Method originalMethod = class_getInstanceMethod(aClass, originalSelector);
    Method swizzledMethod = class_getInstanceMethod(aClass, swizzledSelector);

    BOOL didAddMethod =
        class_addMethod(aClass,
                        originalSelector,
                        method_getImplementation(swizzledMethod),
                        method_getTypeEncoding(swizzledMethod));

    if (didAddMethod) {
        class_replaceMethod(aClass,
                            swizzledSelector,
                            method_getImplementation(originalMethod),
                            method_getTypeEncoding(originalMethod));
    } else {
        method_exchangeImplementations(originalMethod, swizzledMethod);
    }
}

#pragma mark - Method Swizzling

- (void)xy_presentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion
{
    if ([NSStringFromClass(viewControllerToPresent.class) isEqualToString:@"RPBroadcastPickerStandaloneViewController"]) {
        //RPSystemVC记录RPSystemBroadcastPickerView所在的vc，在需要的时机调用dismissViewControllerAnimated即可
        [XYSDKManager sharedInstance].RPSystemVC = viewControllerToPresent;
        [self xy_presentViewController:viewControllerToPresent animated:flag completion:completion];
    } else {
        [self xy_presentViewController:viewControllerToPresent animated:flag completion:completion];
    }
    
}

@end

iOS14及以上：

//App随便设置一个scheme，在需要的时候调用此方法即可
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"xylinksdk://"] options:@{} completionHandler:^(BOOL success) {
     NSLog(@"%d", success);
}];
2022-11-01 19:32:14
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