iOS阶段学习第32天笔记(页面传值方法介绍)，ios第32天
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iOS阶段学习第32天笔记(页面传值方法介绍)，ios第32天
iOS学习(UI)知识点整理
一、界面传值方法
1、方法一 Block传值 通过SubView视图的Block向View视图传值改变View视图的背景色 实例代码：
1）SubViewController.h 文件的代码实现
1 #import <UIKit/UIKit.h> 2 @interface SubViewController : UIViewController 3 @property (nonatomic,copy) void(^callback)(UIColor *color); 4 -(void)login:(NSString *)username password:(NSString *)password complete:(void(^)(UIColor *color))callback; 5 @end
2）SubViewController.m 文件代码实现
1 #import "SubViewController.h" 2 @interface SubViewController () 3 @end 4 @implementation SubViewController 5 - (void)viewDidLoad { 6 [super viewDidLoad]; 7 self.view.backgroundColor = [UIColor grayColor]; 8 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self 9 action:@selector(testAciton)]; 10 } 12 -(void)testAciton 13 { 14 _callback([UIColor blueColor]); 15 [self.navigationController popViewControllerAnimated:YES]; 16 } 17 -(void)login:(NSString *)username password:(NSString *)password complete:(void(^)(UIColor *color))callback 19 { 20 callback([UIColor redColor]); 21 } 22 @end
3）ViewController.m 文件的代码实现：
1 #import "ViewController.h" 2 #import "SubViewController.h" 3 @interface ViewController () 4 @end 5 @implementation ViewController 6 - (void)viewDidLoad { 7 [super viewDidLoad]; 8 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks
target:self action:@selector(testAciton)]; 11 } 12 -(void)testAciton 13 { 14 SubViewController *subvc = [[SubViewController alloc]init]; 15 // subvc.callback --> void(^)(UIColor *) 16 //传参与回调 17 [subvc login:@"Admin" password:@"123" complete:^(UIColor *color) { 18 self.view.backgroundColor = color; 19 }]; 21 [subvc setCallback:^(UIColor *color) { 22 self.view.backgroundColor = color; 23 }]; 24 [self.navigationController pushViewController:subvc animated:YES]; 25 } 26 @end
2、方法二 通知中心传值 实例代码：
1）添加一个通知中心管理类 KKNotificationCenter.h 文件实现代码
1 #import <Foundation/Foundation.h> 2 @interface KKNotification : NSObject 3 //观察者对象 4 @property (nonatomic,strong) id observer; 5 //观察者通知执行方法 6 @property (nonatomic,assign) SEL selector; 7 //观察者的键值 8 @property (nonatomic,copy) NSString *name; 9 //返回参数 10 @property (nonatomic,strong) id object; 11 @end 12 13 @interface KKNotificationCenter : NSObject 14 +(id)defaultCenter; 15 -(void)addObserver:(id)observer selector:(SEL)sel name:(NSString *)name object:(id)object; 16 -(void)postNotificationName:(NSString *)name object:(id)object; 17 @end
2）KKNotificationCenter.m 文件实现代码
1 #import "KKNotificationCenter.h" 2 @implementation KKNotification 3 @end 4 @implementation KKNotificationCenter 5 { 6 NSMutableArray *_notArray; 7 } 8 9 +(id)defaultCenter 10 { 11 static KKNotificationCenter *_q = nil; 12 if (!_q) { 13 _q = [[KKNotificationCenter alloc]init]; 14 } 15 return _q; 16 } 18 - (id)init 19 { 20 self = [super init]; 21 if (self) { 22 _notArray = [[NSMutableArray alloc]init]; 23 } 24 return self; 25 } 26 27 -(void)addObserver:(id)observer selector:(SEL)sel name:(NSString *)name object:(id)object 28 { 29 KKNotification *not = [[KKNotification alloc]init]; 30 not.observer = observer; 31 not.selector = sel; 32 not.name = name; 33 [_notArray addObject:not]; 34 } 35 36 -(void)postNotificationName:(NSString *)name object:(id)object 37 { 38 for (KKNotification *not in _notArray) { 39 if ([not.name isEqualToString:name]) { 40 not.object = object; 41 [not.observer performSelector:not.selector withObject:not]; 42 } 43 } 44 } 45 @end
3）在ViewController.m 视图文件中注册一个观察者 实例代码
1 #import "ViewController.h" 2 #import "SubViewController.h" 3 #import "KKNotificationCenter.h" 4 @interface ViewController () 5 @end 6 @implementation ViewController 7 - (void)viewDidLoad { 8 [super viewDidLoad]; 9 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self 10 action:@selector(testAciton)]; 11 12 //在通知中心里注册一个观察者:self 13 //name:作为观察者的键值 14 [[KKNotificationCenter defaultCenter]addObserver:self selector:@selector(notAction:) 15 name:@"changeColor" object:nil]; 16 } 17 18 -(void)notAction:(KKNotification *)not 19 { 20 self.view.backgroundColor = not.object; 21 } 22 23 -(void)testAciton 24 { 25 SubViewController *subvc = [[SubViewController alloc]init]; 27 [subvc setValue:@20 forKey:@"age"]; 28 [subvc performSelector:@selector(testAciton) withObject:nil]; 30 [self.navigationController pushViewController:subvc animated:YES]; 31 } 32 @end
4）SubViewController.h 文件中的代码实现
1 #import <UIKit/UIKit.h> 2 @interface SubViewController : UIViewController 3 { 4 @private 5 int age; 6 } 8 -(void)test; 10 @end
5）SubViewController.m 文件中执行通知的代码实现
1 #import "SubViewController.h" 2 #import "KKNotificationCenter.h" 3 @interface SubViewController () 4 @end 5 @implementation SubViewController 6 - (void)viewDidLoad { 7 [super viewDidLoad]; 8 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks
target:self action:@selector(testAciton)]; 10 } 12 -(void)testAciton 13 { 14 //通知中心广播 15 //广播使用的名字,必须和注册时,使用的名字一致 16 [[KKNotificationCenter defaultCenter]postNotificationName:@"changeColor" object:[UIColor redColor]]; 17 [self.navigationController popViewControllerAnimated:YES]; 18 } 20 -(void)test 21 { 22 NSLog(@"%d",age); 23 } 24 @end
3、方法三 Target-Action 传值 通过SubViewController传值改变ViewControllerd的背景色 实例代码
1）SubViewController.h 文件中的代码实现
1 #import <UIKit/UIKit.h> 2 //枚举 区别控制器类型 3 typedef NS_ENUM(NSUInteger, PlayerController) { 4 PlayerControllerLeft, 5 PlayerControllerRight, 6 PlayerControllerCenter, 7 PlayerControllerUp, 8 PlayerControllerDown, 9 }; 10 11 @interface SubViewController : UIViewController 12 -(void)addTarget:(id)obj action:(SEL)action forEvents:(PlayerController)events; 13 @end
2）SubViewController.m 文件中的代码实现
1 #import "SubViewController.h" 2 @interface SubViewController () 3 { 4 id _leftObj; 5 id _rightObj; 6 SEL _leftSelector; 7 SEL _rightSelector; 8 } 9 @end 10 @implementation SubViewController 11 - (void)viewDidLoad { 12 [super viewDidLoad]; 14 self.view.backgroundColor = [UIColor grayColor]; 15 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self action:@selector(leftAction)]; 18 } 19 20 -(void)addTarget:(id)obj action:(SEL)action forEvents:(PlayerController)events 21 { 22 switch (events) { 23 case PlayerControllerLeft: 24 { 25 _leftObj = obj; 26 _leftSelector = action; 27 } 28 break; 29 case PlayerControllerRight: 30 { 31 _rightObj = obj; 32 _rightSelector = action; 33 } 34 break; 36 default: 37 break; 38 } 39 } 41 -(void)leftAction 42 { 43 [_leftObj performSelector:_leftSelector withObject:nil]; 45 [self.navigationController popViewControllerAnimated:YES]; 46 } 48 @end
3）ViewController.m 文件中的代码实现
1 #import "ViewController.h" 2 #import "SubViewController.h" 3 @interface ViewController () 4 @end 5 @implementation ViewController 6 - (void)viewDidLoad { 7 [super viewDidLoad]; 8 UIButton *btn 9 = [UIButton buttonWithType:UIButtonTypeCustom]; 10 [btn addTarget:self action:@selector(clickAction) forControlEvents:UIControlEventTouchUpInside]; 11 btn.frame = CGRectMake(10, 100, 300, 50); 12 btn.backgroundColor = [UIColor blueColor]; 13 [self.view addSubview:btn]; 15 } 16 17 -(void)clickAction 18 { 19 SubViewController *subvc = [[SubViewController alloc]init]; 21 [subvc addTarget:self action:@selector(leftAction) forEvents:PlayerControllerLeft]; 23 [subvc addTarget:self action:@selector(rightAction) forEvents:PlayerControllerRight]; 25 [self.navigationController pushViewController:subvc animated:YES]; 26 } 28 -(void)leftAction 29 { 30 self.view.backgroundColor = [UIColor yellowColor]; 31 } 33 -(void)rightAction 34 { 35 self.view.backgroundColor = [UIColor redColor]; 36 } 38 @end
4、方法四 代理传值 通过SubViewController传值改变ViewControllerd的背景色 实例代码
1) SubViewController.h文件中的代码实现
1 #import <UIKit/UIKit.h> 2 //协议的本质就是一个方法列表 3 @protocol Protocal <NSObject> 4 -(void)changeTitle:(NSString *)title; 5 -(void)changeBackColor:(UIColor *)color; 6 -(void)changeViewColor:(UIColor *)color; 7 @end 8 @interface SubViewController : UIViewController 9 @property (nonatomic,assign) id<Protocal> delegate; 10 @end
2）SubViewController.m文件中的代码实现
1 #import "SubViewController.h" 2 #import "ViewController.h" 3 @interface SubViewController () 4 @end 5 @implementation SubViewController 6 7 - (void)viewDidLoad { 8 [super viewDidLoad]; 9 self.title = @"界面二"; 10 self.view.backgroundColor = [UIColor grayColor]; 11 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks
target:self action:@selector(backAction)]; 13 } 14 15 -(void)backAction 16 { 17 // NSArray *arr = self.navigationController.viewControllers; 18 // UIViewController *vc = arr[arr.count - 2]; 19 // ViewController *vc = (ViewController *)_delegate; 21 [_delegate changeTitle:@"home"]; 22 [_delegate changeBackColor:[UIColor blueColor]]; 23 [_delegate changeViewColor:[UIColor yellowColor]]; 25 [self.navigationController popViewControllerAnimated:YES]; 27 } 28 -(void)dealloc 29 { 30 NSLog(@"----------------------"); 31 } 32 @end
3）ViewController.h文件中的代码实现
1 #import <UIKit/UIKit.h> 2 #import "SubViewController.h" 4 @interface ViewController : UIViewController<Protocal> 6 -(void)changeTitle:(NSString *)title; 7 -(void)changeBackColor:(UIColor *)color; 8 -(void)changeViewColor:(UIColor *)color; 10 @end
4）ViewController.m文件中的代码实现
1 #import "ViewController.h" 2 #import "SubViewController.h" 3 @interface ViewController () 4 { 5 UIView *_v; 6 SubViewController *subvc; 7 } 8 @end 10 @implementation ViewController 12 - (void)viewDidLoad { 13 [super viewDidLoad]; 14 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self action:@selector(pushAction)]; 17 self.title = @"首页"; 18 _v = [[UIView alloc]initWithFrame:CGRectMake(100, 200, 200, 100)]; 19 [self.view addSubview:_v]; 20 _v.backgroundColor = [UIColor redColor]; 21 subvc = [[SubViewController alloc]init]; 22 subvc.delegate = self; 23 } -(void)pushAction 26 { 27 [self.navigationController pushViewController:subvc animated:YES]; 28 } 29-(void)changeViewColor:(UIColor *)color 31 { 32 _v.backgroundColor = color; 33 } -(void)changeTitle:(NSString *)title 36 { 37 self.title = title; 38 } -(void)changeBackColor:(UIColor *)color 41 { 42 self.view.backgroundColor = color; 43 } @end
5、方法五 属性传值 通过FirstViewController传值改变SubViewControllerd的背景色 实例代码
1）SubViewController.h文件中的代码实现
1 #import <UIKit/UIKit.h> 2 @interface SubViewController : UIViewController 3 @property(nonatomic,strong) NSString *mtitle; 4 @property(nonatomic,strong) UIColor *color; 5 @end
2）SubViewController.m 文件中的代码实现
1 #import "SubViewController.h" 2 @interface SubViewController () 3 @end 4 @implementation SubViewController 5 - (void)viewDidLoad { 6 [super viewDidLoad]; self.title=_mtitle; 9self.view.backgroundColor=_color; } 12 @end
3）FirstViewController.m 文件中的代码实现
1 #import "FirstViewController.h" 2 #import "SubViewController.h" 3 @interface FirstViewController () 4 @end 5 @implementation FirstViewController 6 - (void)viewDidLoad { 7 [super viewDidLoad]; 8 self.view.backgroundColor=[UIColor whiteColor]; 9 UIButton *button=[[UIButton alloc]init]; 10 button.frame=CGRectMake(80, 100, 200, 30); 11 button.backgroundColor=[UIColor blackColor]; 12 [button setTitle:@"下一页" forState:UIControlStateNormal]; 13 [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 14 [button addTarget:self 15 action:@selector(touchButton:) forControlEvents:UIControlEventTouchUpInside]; 16 [self.view addSubview:button]; 17 } 18 19 -(void)touchButton:(UIButton*)button{ 20 button.backgroundColor=[UIColor grayColor]; 21 22 SubViewController *subVC=[[SubViewController alloc]init]; 23 subVC.mtitle=@"页面二"; 24 subVC.color=[UIColor redColor]; 25 [self.navigationController pushViewController:subVC animated:YES]; 26 } 27 @end
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