从0开发一款IOS APP(第一天)
从0开发一款IOS APP
源码:
https://github.com/geektime-geekbang/geektime-ios-course
我的Github:
https://github.com/zx490336534/SampleApp
欢迎关注我的公众号:zx94_11
创建第一个Xcode工程
创建1
创建2
创建3
Hello world
viewController.m文件:
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. [self.view addSubview:({ UILabel *label = [[UILabel alloc] init]; label.text = @"hello wolrd"; [label sizeToFit]; label.center = CGPointMake(self.view.frame.size.width/2,self.view.frame.size.height/2); label; })]; } @end
Hello World
创建一个坐标宽高都为100的红色方块
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; UIView *view = [[UIView alloc] init]; view.backgroundColor = [UIColor redColor]; view.frame = CGRectMake(100, 100, 100, 100); [self.view addSubview:view]; } @end
红色方框
创建一个有重叠的绿色方块
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; UIView *view = [[UIView alloc] init]; view.backgroundColor = [UIColor redColor]; view.frame = CGRectMake(100, 100, 100, 100); [self.view addSubview:view]; UIView *view2 = [[UIView alloc] init]; view2.backgroundColor = [UIColor greenColor]; view2.frame = CGRectMake(150, 150, 100, 100); [self.view addSubview:view2]; } @end
view2在view之后创建,所以view2在view上方
绿色方块
UIview的生命周期
创建一个自己的TestView,继承于UIView
@interface TestView : UIView // 创建一个自己的TestView,继承于UIView @end @implementation TestView - (instancetype)init{ self = [super init]; if (self) { } return self; } - (void)willMoveToSuperview:(nullable UIView *)newSuperview{ [super willMoveToSuperview:newSuperview]; } - (void)didMoveToSuperview{ [super didMoveToSuperview]; } - (void)willMoveToWindow:(nullable UIWindow *)newWindow{ [super willMoveToWindow:newWindow]; } - (void)didMoveToWindow{ [super didMoveToWindow]; } @end
断点调试
断点调试
实例化的时候使用TestView:TestView *view2 = [[TestView alloc] init];
ViewController的生命周期
- init
- viewDidLoad
- viewWillAppear
- viewDidAppear
- viewWillDisappear
- viewDidDisappear
- Dealloc
实现TabBar页面
AppDelegate.m文件:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; UITabBarController *tabbarController = [[UITabBarController alloc] init]; UIViewController *controller1 =[[UIViewController alloc]init]; controller1.view.backgroundColor = [UIColor redColor]; UIViewController *controller2 =[[UIViewController alloc]init]; controller2.view.backgroundColor = [UIColor yellowColor]; UIViewController *controller3 =[[UIViewController alloc]init]; controller3.view.backgroundColor = [UIColor greenColor]; UIViewController *controller4 =[[UIViewController alloc]init]; controller4.view.backgroundColor = [UIColor lightGrayColor]; [tabbarController setViewControllers:@[controller1,controller2,controller3,controller4]]; self.window.rootViewController = tabbarController; [self.window makeKeyAndVisible]; return YES; }
点击不同位置颜色不同
TabBar
增加标题
UIViewController *controller1 =[[UIViewController alloc]init]; controller1.view.backgroundColor = [UIColor redColor]; controller1.tabBarItem.title=@"新闻"; UIViewController *controller2 =[[UIViewController alloc]init]; controller2.view.backgroundColor = [UIColor yellowColor]; controller2.tabBarItem.title=@"视频"; UIViewController *controller3 =[[UIViewController alloc]init]; controller3.view.backgroundColor = [UIColor greenColor]; controller3.tabBarItem.title=@"推荐"; UIViewController *controller4 =[[UIViewController alloc]init]; controller4.view.backgroundColor = [UIColor lightGrayColor]; controller4.tabBarItem.title=@"我的";
增加标题
增加图片
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; UITabBarController *tabbarController = [[UITabBarController alloc] init]; UIViewController *controller1 =[[UIViewController alloc]init]; controller1.view.backgroundColor = [UIColor redColor]; controller1.tabBarItem.title=@"新闻"; controller1.tabBarItem.image = [UIImage imageNamed:@"icon.bundle/page@2x.png"]; controller1.tabBarItem.selectedImage = [UIImage imageNamed:@"ico.bundle/page_selected@2x.png"]; UIViewController *controller2 =[[UIViewController alloc]init]; controller2.view.backgroundColor = [UIColor yellowColor]; controller2.tabBarItem.title=@"视频"; controller2.tabBarItem.image = [UIImage imageNamed:@"icon.bundle/video@2x.png"]; controller2.tabBarItem.selectedImage = [UIImage imageNamed:@"ico.bundle/video_selected@2x.png"]; UIViewController *controller3 =[[UIViewController alloc]init]; controller3.view.backgroundColor = [UIColor greenColor]; controller3.tabBarItem.title=@"推荐"; controller3.tabBarItem.image = [UIImage imageNamed:@"icon.bundle/like@2x.png"]; controller3.tabBarItem.selectedImage = [UIImage imageNamed:@"ico.bundle/like_selected@2x.png"]; UIViewController *controller4 =[[UIViewController alloc]init]; controller4.view.backgroundColor = [UIColor lightGrayColor]; controller4.tabBarItem.title=@"我的"; controller4.tabBarItem.image = [UIImage imageNamed:@"icon.bundle/home@2x.png"]; controller4.tabBarItem.selectedImage = [UIImage imageNamed:@"ico.bundle/home_selected@2x.png"]; [tabbarController setViewControllers:@[controller1,controller2,controller3,controller4]]; self.window.rootViewController = tabbarController; [self.window makeKeyAndVisible]; return YES; }
Tab图片
