在后台运行时像Pastebot一样抓住UIPasteboard
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我知道这是可能的，因为Tapbots Pastebot可以做到这一点。我试图在iPhone应用程序在后台运行时抓取UIPasteboard，然后像Pastebot一样将其添加到UITableView中，但是我也试图缩短链接（如果它是URL）并将其复制回UIPastboard，以便准备就绪供用户粘贴到任何地方。现在，Pastebot显然通过播放音频文件10分钟而在后台运行。我已经在applicationDidFinishLaunching中设置了NSNotificationCenter
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(pasteboardChangedNotification:) name:UIPasteboardChangedNotification object:[UIPasteboard generalPasteboard]];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(pasteboardChangedNotification:) name:UIPasteboardRemovedNotification object:[UIPasteboard generalPasteboard]];
- (void)pasteboardChangedNotification:(NSNotification*)notification {
pasteboardChangeCount_ = [UIPasteboard generalPasteboard].changeCount;
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
if (pasteboardChangeCount_ != [UIPasteboard generalPasteboard].changeCount) {
[[NSNotificationCenter defaultCenter] postNotificationName:UIPasteboardChangedNotification object:[UIPasteboard generalPasteboard]];
}
}
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葛瞎说漓
，而只是在后台定期复制的内容。 下面的代码每秒检查一次“ 2”，持续一千秒钟。我相信一个应用程序可以在后台运行大约10分钟而无需播放音频。如果您在后台播放音频文件，则应用程序可以继续运行。- (void)applicationDidEnterBackground:(UIApplication *)application { // Create a background task identifier __block UIBackgroundTaskIdentifier task; task = [application beginBackgroundTaskWithExpirationHandler:^{ NSLog(@\"System terminated background task early\"); [application endBackgroundTask:task]; }]; // If the system refuses to allow the task return if (task == UIBackgroundTaskInvalid) { NSLog(@\"System refuses to allow background task\"); return; } // Do the task dispatch_async(dispatch_get_global_queue(0, 0), ^{ NSString *pastboardContents = nil; for (int i = 0; i < 1000; i++) { if (![pastboardContents isEqualToString:[UIPasteboard generalPasteboard].string]) { pastboardContents = [UIPasteboard generalPasteboard].string; NSLog(@\"Pasteboard Contents: %@\", pastboardContents); } // Wait some time before going to the beginning of the loop [NSThread sleepForTimeInterval:1]; } // End the task [application endBackgroundTask:task]; }); }芯伶句餐绕
傻寺俊擒