纯代码实现基本控件

最新推荐文章于 2023-04-07 14:25:43 发布

原创最新推荐文章于 2023-04-07 14:25:43 发布 · 661 阅读

0 ·

CC 4.0 BY-SA版权

IOS - UIKit 专栏收录该内容

1 篇文章

订阅专栏

1.创建一个UIWindow

//初始化 [[UIScreen mainScreen] bounds 是一个Frame CGRect 也可以自定义 用CGRectMake
//self.window = [[UIWindow alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];意思就是一个大小200*200 原点在0，0的框
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
//定义背景颜色 可以用rgb颜色定义 r g b取值为0～1
//self.window.backgroundColor = [UIColor colorWithRed:1 green:0 blue:0 alpha:1];
//或者使用图片
//UIImage *backImage = [UIImage imageNamed:@"background"];
//self.window.backgroundColor = [UIColor colorWithPatternImage:backImage];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];

2.创建一个UIView

UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(0，0，100，100)];
myView.backgroundColor = [UIColor redColor];
//把myView加载到UIWindow上 
[self.window addSubview:myView];
//设置myView的高度
[myView setFrame:CGRectMake(0,20,100,100)];

3.创建一个UIViewController

//MyFirstViewController 由自己定义在项目中
MyFirstViewController *viewController = [[MyFirstViewController alloc] initWithNibName:nil bundle:nil];
//viewController的view会被自动加载 具体看api帮助
self.window.rootViewController = viewController;

4.在UIViewController添加简单控件

在自定义的UIViewController添加UIButton UILabel 其余的类似当然也可以加一个新的UIView

//添加UIButton
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 20, 200, 50)];
button.backgroundColor = [UIColor colorWithRed:1 green:0 blue:0 alpha:0.6];
[button setTitle:@"test" forState:UIControlStateNormal];
[self.view addSubview:button];
//为button添加一个事件
[button addTarget:self action:@selector(someButtonClicked) forControlEvents:UIControlEventTouchUpInside];
//添加UILabel
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 80, 200, 50)];
label.text=@"test";
[self.view addSubview:label];

5.控制UIViewController跳转

模态（modal）：a弹出b a为presenting view controller b为presented view controller

-(void)someButtonClicked
{
    [self presentViewController:self.aVC animated:YES completion:^{
        
    }];
}

消失直接写在b中已做优化

[self dismissViewControllerAnimated:YES completion:^{
        
    }];

如设置委托在被弹出vc中设协议弹出vc中实现可实现传值和任意层跳回中间的层将直接消失最后那个会有动画

弹出式的动画风格设置presented VC的modalPresentationStyle属性

UIModalPresentationFullScreen;//默认的;
UIModalPresentationPageSheet;
UIModalPresentationFormSheet;
UIModalPresentationCurrentContext;