iOS開發之截屏分享功能

1、監聽系統截屏通知

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleUserDidTakeScreenshotNotification:) name:UIApplicationUserDidTakeScreenshotNotification object:nil];

2、監聽到截屏后獲取屏幕截屏圖片

UIWindow *window = [[[UIApplication sharedApplication] delegate] window];
    // 1.開啟上下文
    UIGraphicsBeginImageContextWithOptions(window.bounds.size, window.opaque, 0);
    // 2.渲染
    [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO];
    // 3.獲取圖片
    UIImage *snapshotImage=UIGraphicsGetImageFromCurrentImageContext();
    // 4.結束上下文
    UIGraphicsEndImageContext();

3、對圖片進行存儲本地或者服務器進行分享操作