macOS獲取屏幕窗口大小,獲取寬度占窗口一半

鳴謝簡書作者：原來你是這種花椒

就像iOS獲取設備大小一樣，macOS的窗口大小就是我們所需要的代碼。

self.view.bounds.size.width
self.view.bounds.size.height

如果項目中使用Masonry插件，要獲取當前view的寬度那就是，高度同寬度修改即可

 make.width.equalTo(self.view.mas_width).multipliedBy(0.5);//占屏幕寬度的一半

占屏幕寬度的一半再減去10

make.width.equalTo(ws.mas_width).multipliedBy(0.5).offset(-10);//占屏幕寬度的一半再減去10

 

我們在窗口變化的通知中監聽當前窗口大小，來決定控件的大小顯示。

交代清楚我們上代碼，先復制一段代碼運行感受一下。在從中選擇我們需要的的代碼。

#import "ViewController.h"
#import <WebKit/WebKit.h>
@interface ViewController ()
@property (nonatomic,strong)WKWebView * webView;
@end

@implementation ViewController

-(void)viewDidLoad {
    [super viewDidLoad];
    //觀察窗口拉伸
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(screenResize)
                                                name:NSWindowDidResizeNotification
                                              object:nil];


    
    _webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];//初始化
    [self.view addSubview:_webView];

    //1.網絡
    _webView.allowsBackForwardNavigationGestures = YES;
    NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://www.hao123.com/"]];

    [_webView loadRequest:request];
}

-(void)screenResize{
    
    NSLog(@"觀察窗口拉伸");
    NSLog(@"%.2f===%.2f",self.view.bounds.size.width,self.view.bounds.size.height);

    _webView.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);
    
}

好，我們開始總結macOS開發監聽窗口的改變

1.觀察窗口的拉伸

 [[NSNotificationCenter defaultCenter]addObserver:self      
                                         selector:@selector(screenResize)
                                             name:NSWindowDidResizeNotification
                                           object:nil];

-(void)screenResize{
    
    NSLog(@"觀察窗口拉伸");
    NSLog(@"%.2f===%.2f",self.view.bounds.size.width,self.view.bounds.size.height);
}

2.即將進入全屏

[[NSNotificationCenter defaultCenter]addObserver:self 
                                        selector:@selector(willEnterFull:)
                                            name:NSWindowWillEnterFullScreenNotification
                                          object:nil];

-(void)willEnterFull:(NSNotification*)notification{

NSLog(@"即將全屏");

}

3.即將退出全屏

[[NSNotificationCenter defaultCenter]addObserver:self 
                                        selector:@selector(willExitFull:)
                                            name:NSWindowWillExitFullScreenNotification
                                          object:nil];

-(void)willExitFull:(NSNotification*)notification {

NSLog(@"即將退出全屏");

}

4.已經退出全屏

[[NSNotificationCenter defaultCenter]addObserver:self 
                                        selector:@selector(didExitFull:)
                                            name:NSWindowDidExitFullScreenNotification
                                          object:nil];

-(void)didExitFull:(NSNotification*)notification{

NSLog(@"推出全屏");

}

5.窗口最小化

[[NSNotificationCenter defaultCenter]addObserver:self 
                                        selector:@selector(didMiniaturize:)
                                            name:NSWindowDidMiniaturizeNotification
                                          object:nil];

-(void)didMiniaturize:(NSNotification*)notification{

NSLog(@"窗口變小");

}

6.窗口即將關閉

[[NSNotificationCenter defaultCenter]addObserver:self
                                        selector:@selector(willClose:)
                                            name:NSWindowWillCloseNotification
                                          object:nil];

-(void)willClose:(NSNotification*)notification{

NSLog(@"窗口關閉");

}