UI基础 - 模态视图 - 低头捡石頭

UI基础 - 模态视图

▶ ModalView

1 - 模态视图不是专门的某个类，而是通过视图控制器的 presentViewController方法弹出的视图，我们称为模态视图。模态视图出现的场景一般是临时弹出的窗口，譬如：登录窗口开发中在当前视图上再弹出一个视图、分享视图、注册等等

2 - 代码示例：由 ViewController 推出模态控制器 DetailController

// - ViewController.m

 1 #import "ViewController.h"
 2 #import "DetailController.h"
 3 
 4 @implementation ViewController
 5 
 6 - (void)viewDidLoad {
 7     [super viewDidLoad];
 8     self.view.backgroundColor = [UIColor whiteColor];
 9     self.navigationController.navigationBar.hidden = YES;
10     
11     // Btn
12     UIButton *pushBT = [UIButton buttonWithType:UIButtonTypeCustom];
13     pushBT.frame = CGRectMake(50, 80, 220, 45);
14     [pushBT setTitle:@"进入下级页面" forState:UIControlStateNormal];
15     pushBT.backgroundColor = [UIColor brownColor];
16     [pushBT addTarget:self action:@selector(showNewController) forControlEvents:UIControlEventTouchUpInside];
17     [self.view addSubview:pushBT];
18     
19 }
20 
21 -(void)showNewController{
22     
23     DetailController *newVC = [DetailController new];
24     newVC.modalTransitionStyle = UIModalTransitionStylePartialCurl;// 过渡样式
25     newVC.modalPresentationStyle = UIModalPresentationFullScreen;  // 展示样式
26     [self presentViewController:newVC animated:YES completion:^{
27         NSLog(@"present finished!");
28     }];
29     
30 }
31 
32 @end

// - DetailController.m

 1 #import "DetailController.h"
 2 @implementation DetailController
 3 
 4 - (void)viewDidLoad {
 5     [super viewDidLoad];
 6     self.view.backgroundColor = [UIColor orangeColor];
 7     // Btn
 8     UIButton *backBT = [UIButton buttonWithType:UIButtonTypeCustom];
 9     backBT.frame = CGRectMake(50, 80, 220, 45);
10     [backBT setTitle:@"返回上级页面" forState:UIControlStateNormal];
11     backBT.backgroundColor = [UIColor brownColor];
12     [backBT addTarget:self action:@selector(backPreController) forControlEvents:UIControlEventTouchUpInside];
13     [self.view addSubview:backBT];
14 }
15 
16 
17 -(void)backPreController{
18     // 撤销模态
19     // 方式一
20     [self dismissViewControllerAnimated:YES completion:^{
21         NSLog(@"back finished!");
22     }];
23     
24     // 方式二：前提是模态试图是导航栏控制器的根视图
25     [self.navigationController dismissViewControllerAnimated:YES completion:^{
26         
27     }];
28 
29 }
30 @end