macOS - AppDelegate

#import "AppDelegate.h"

@interface AppDelegate ()

/// 顶部状态栏按钮
@property (nonatomic, strong) NSStatusItem *statusBarItem;

// 自定义的窗口控制器
//@property (nonatomic, strong) NSWindowController *mainWindowController;

@end

@implementation AppDelegate

/*
 启动顺序：
 [AppDelegate applicationWillFinishLaunching:]
 [AppDelegate applicationWillBecomeActive:]
 [AppDelegate applicationDidBecomeActive:]
 [AppDelegate applicationWillUpdate:]
 [AppDelegate applicationDidUpdate:]
 [AppDelegate applicationDidFinishLaunching:]
 [AppDelegate applicationWillUpdate:]，[AppDelegate applicationDidUpdate:]   // 多次触发
 
 挂起（不会挂起进程）
 [AppDelegate applicationWillResignActive:]
 [AppDelegate applicationDidResignActive:]
 激活
 [AppDelegate applicationWillBecomeActive:]
 [AppDelegate applicationDidBecomeActive:]
 [AppDelegate applicationWillUpdate:]，[AppDelegate applicationDidUpdate:]   // 多次触发
 */

- (void)applicationWillFinishLaunching:(NSNotification *)notification
{
    // 设置屏幕顶部状态栏按钮
    [self initStatusBarItem];
}

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // 全局锁定浅色外观，在不打算适配深色外观时用到
    if (@available(macOS 10.14, *)) {
        [NSApplication sharedApplication].appearance = [NSAppearance appearanceNamed:NSAppearanceNameAqua];
    }
    /* 自定义显示的窗口，需要先在Main.storyboard里把"Window Controller"控件的"Is Inital Controller"选项移除，然后自定义NSWindowController实例，NSWindowController实例化详情参考《macOS - NSWindowController》
    NSStoryboard *storyboard                = [NSStoryboard storyboardWithName:@"Custom" bundle:[NSBundle mainBundle]];
    NSWindowController *windowController    = [storyboard instantiateInitialController];
    //[windowController.window makeMainWindow]; // 需要NSWindow子类化实现-[NSWindow canBecomeMainWindow]并返回YES
    [windowController showWindow:nil];
    self.mainWindowController               = windowController;
     */
}

#pragma mark 屏幕顶部状态栏按钮，一般用于激活窗口，如果要上架App Store，就必须加这个
- (void)initStatusBarItem
{
    NSStatusItem *item  = [[NSStatusBar systemStatusBar] statusItemWithLength:NSSquareStatusItemLength];
    self.statusBarItem  = item;
    item.button.action  = @selector(statusBarItemClicked:);
    item.button.target  = self;
    item.button.toolTip = [[NSBundle mainBundle].infoDictionary valueForKey:(__bridge NSString *)kCFBundleNameKey];
    item.button.imageScaling = NSImageScaleNone;
    /*
     图片建议大小：16pt × 16pt
     图片建议设置为模板（Assets.xcassets图片属性Renders As改为Template Image，或NSImage.template = YES）
     */
    item.button.image   = [NSImage imageNamed:NSImageNameIconViewTemplate];
}

- (void)statusBarItemClicked:(NSStatusItem *)sender
{
    NSApplication *app = [NSApplication sharedApplication];
    if (app.isHidden) {
        [app unhide:sender];
    }
    if (app.isActive == NO) {
        // 激活窗口，否则窗口会出现无法响应事件的问题
        [app activateIgnoringOtherApps:YES];
        [[NSRunningApplication currentApplication] activateWithOptions:NSApplicationActivateAllWindows];
    }
    // 建议指定窗口前置
    NSWindow *window = [self anyWindow];
    [window makeKeyAndOrderFront:nil];
}

- (NSWindow *)anyWindow
{
    //return self.mainWindowController.window;
    //return [NSApplication sharedApplication].mainWindow;
    for (NSWindow *window in [NSApplication sharedApplication].windows) {
        if (window != self.statusBarItem.button.window) {
            return window;
        }
    }
    return nil;
}

AppDelegate - Status Bar Item.gif

#pragma mark 为程序坞（dock）添加菜单
- (nullable NSMenu *)applicationDockMenu:(NSApplication *)sender
{
    NSMenu *menu            = [[NSMenu alloc] initWithTitle:@""];
    NSMenuItem *firstItem   = [menu addItemWithTitle:@"First Dock Menu Item"
                                              action:@selector(dockMenuItemClicked:)
                                       keyEquivalent:@""];
    firstItem.enabled       = YES;
    firstItem.target        = self;
    
    NSMenuItem *secondItem  = [menu addItemWithTitle:@"Second Dock Menu Item"
                                              action:@selector(dockMenuItemClicked:)
                                       keyEquivalent:@""];
    secondItem.enabled      = YES;
    secondItem.target       = self;
    return menu;
}

- (void)dockMenuItemClicked:(NSMenuItem *)sender
{
    NSLog(@"%@ Clicked",sender.title);
}

#pragma mark 程序坞（dock）上的图标被点击了
- (BOOL)applicationShouldHandleReopen:(NSApplication *)sender hasVisibleWindows:(BOOL)flag
{
    if (flag) {
        return YES;
    }
    // 建议指定窗口前置
    [[self anyWindow] makeKeyAndOrderFront:nil];
    return YES;
}

AppDelegate - Dock Menu.png

#pragma mark 应用程序将要退出，一般在提示重要数据未保存时使用
- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
{
    /* 需要在info.plist里加上这个，否则只会执行一次或不执行
     <key>NSSupportsSuddenTermination</key>
     <false/>
     */
    NSAlert *alert              = [NSAlert new];
    alert.messageText           = @"Application should terminate";
    alert.alertStyle            = NSAlertStyleCritical;
    [alert addButtonWithTitle:@"Quit"].tag      = NSModalResponseOK;
    [alert addButtonWithTitle:@"Cancel"].tag    = NSModalResponseCancel;
    [alert beginSheetModalForWindow:[self anyWindow] completionHandler:^(NSModalResponse returnCode) {
        BOOL quit = returnCode == NSModalResponseOK;
        [[NSApplication sharedApplication] replyToApplicationShouldTerminate:quit];
    }];
    return NSTerminateLater;
    /*
     NSModalResponse response    = [alert runModal];
     return response == NSModalResponseOK ? NSTerminateNow : NSTerminateCancel;
     */
}

#pragma mark 应用程序将要退出，清理缓存和关闭某些功能时用到
- (void)applicationWillTerminate:(NSNotification *)aNotification {
    /* 需要在info.plist里加上这个，否则不会执行
     <key>NSSupportsSuddenTermination</key>
     <false/>
     */
    NSLog(@"Application will terminate...");
}

AppDelegate - App Should Terminate.gif

#pragma mark 其他方法
- (void)applicationWillBecomeActive:(NSNotification *)notification
{
    // 应用程序将要激活
}
- (void)applicationDidBecomeActive:(NSNotification *)notification
{
    // 应用程序已激活
}
- (void)applicationWillResignActive:(NSNotification *)notification
{
    // 应用程序将要挂起
}
- (void)applicationDidResignActive:(NSNotification *)notification
{
    // 应用程序已挂起
}
/*
- (void)applicationWillUpdate:(NSNotification *)notification
{
    // 应用程序被激活后，任何操作都会触发此事件
}
- (void)applicationDidUpdate:(NSNotification *)notification
{
    // 应用程序被激活后，任何操作都会触发此事件
}
- (void)applicationDidHide:(NSNotification *)notification
{
    // 应用程序已隐藏
}
- (void)applicationWillUnhide:(NSNotification *)notification
{
    // 应用程序将要取消隐藏
}
- (void)applicationDidUnhide:(NSNotification *)notification
{
    // 应用程序已取消隐藏
}
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
{
    // 所有窗口被关闭时退出程序，会触发[AppDelegate applicationShouldTerminate:];
    return YES;
}
*/

@end