我很難弄清楚如何將所有這些放在一起。我在Mac上有一個(gè)難題解決應(yīng)用程序。您輸入難題，按一個(gè)按鈕，然后它嘗試查找解決方案的數(shù)量，最小移動(dòng)量等，因此我想保持UI更新。然后，一旦計(jì)算完成，請(qǐng)重新啟用按鈕并更改標(biāo)題。以下是按鈕選擇器和解決功能的一些示例代碼：（請(qǐng)記住，我從Xcode復(fù)制/粘貼，因此可能缺少一些{}或其他拼寫(xiě)錯(cuò)誤..但是它應(yīng)該可以使您了解我的想法。我正在嘗試做?；旧?，用戶(hù)按下一個(gè)按鈕，該按鈕為ENABLED = NO，調(diào)用此函數(shù)來(lái)計(jì)算拼圖。在計(jì)算時(shí)，請(qǐng)使用移動(dòng)/解決方案數(shù)據(jù)更新UI標(biāo)簽。然后，一旦完成拼圖計(jì)算，Button為ENABLED = YES；按下按鈕時(shí)調(diào)用：- (void) solvePuzzle:(id)sender{ solveButton.enabled = NO; solveButton.title = @"Working . . . ."; // I've tried using this as a Background thread, but I can't get the code to waitTilDone before continuing and changing the button state. [self performSelectorInBackground:@selector(createTreeFromNode:) withObject:rootNode]; // I've tried to use GCD but similar issue and can't get UI updated. //dispatch_queue_t queue = dispatch_queue_create("com.gamesbychris.createTree", 0); //dispatch_sync(queue, ^{[self createTreeFromNode:rootNode];}); } // Need to wait here until createTreeFromNode is finished. solveButton.enabled=YES; if (numSolutions == 0) { solveButton.title = @"Not Solvable"; } else { solveButton.title = @"Solve Puzzle"; }}
GCD，線(xiàn)程，程序流和UI更新
寶慕林4294392
2019-12-02 13:55:48
