iOS学习笔记-050.Modal模态

Modal模态

一、Modal介绍

• 除了push之外，还有另外一种控制器的切换方式，那就是Modal

• 任何控制器都能通过Modal的形式展示出来

• Modal的默认效果：新控制器从屏幕的最底部往上钻，直到盖住之前的控制器为止

二、Modal操作

以Modal的形式展示控制器- (void)presentViewController:(UIViewController *)viewControllerToPresent animated: (BOOL)flag completion:(void (^)(void))completion关闭当初Modal出来的控制器- (void)dismissViewControllerAnimated: (BOOL)flag completion: (void (^)(void))completion;

三、代码

WMOneViewController.m

////  WMOneViewController.m//  03_UIView40_Modal////  Created by 杞文明 on 2016/04/10 11:54:06   星期日//  Copyright © 2016年 杞文明. All rights reserved.//#import "WMOneViewController.h"#import "WMTwoViewController.h"@interface WMOneViewController ()@end@implementation WMOneViewController- (void)viewDidLoad {    [super viewDidLoad];}- (IBAction)jump2Two:(id)sender {    //1.创建控制器    WMTwoViewController * vc = [[WMTwoViewController alloc]init];    //2.创建导航控制器    UINavigationController *nvc = [[UINavigationController alloc]initWithRootViewController:vc];    //3.模态方式打开控制器    [self presentViewController:nvc animated:YES completion:^{        NSLog(@"完全打开 第二个了");    }];}@end

WMTwoViewController.m

////  WMTwoViewController.m//  03_UIView40_Modal////  Created by 杞文明 on 2016/04/10 11:53:50   星期日//  Copyright © 2016年 杞文明. All rights reserved.//#import "WMTwoViewController.h"#import "WMThreeViewController.h"@interface WMTwoViewController ()@end@implementation WMTwoViewController- (void)viewDidLoad {    [super viewDidLoad];    //返回按钮    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(closeTwo)];}/** *跳到第三个界面 */- (IBAction)jump2Three:(id)sender {    //1.创建控制器    WMThreeViewController *vc = [[WMThreeViewController alloc]init];    //2.模态方式打开    [self presentViewController:vc animated:YES completion:^{         NSLog(@"完全打开 第三个了");    }];}-(void)closeTwo{    // 如果一个控制器是以模态的形式展现出来的, 可以调用该控制器以及该控制器的子控制器让让控制器消失//    [self dismissViewControllerAnimated:YES completion:^{//        NSLog(@"完全打开 第二个了");//    }];    [self.navigationController dismissViewControllerAnimated:YES completion:^{        NSLog(@"完全打开 第二个了");    }];}@end

WMThreeViewController.m

////  WMThreeViewController.m//  03_UIView40_Modal////  Created by 杞文明 on 2016/04/10 11:53:59   星期日//  Copyright © 2016年 杞文明. All rights reserved.//#import "WMThreeViewController.h"@interface WMThreeViewController ()@end@implementation WMThreeViewController- (void)viewDidLoad {    [super viewDidLoad];}//关闭- (IBAction)myClose:(id)sender {    [self dismissViewControllerAnimated:YES completion:^{        NSLog(@"已经关闭 第三个了");    }];}@end

四、图示