iOS UI-UIPickerView（拾取器）、UIWebView（网页视图）和传值方式

 //
 //  ViewController.m
 //  IOS_0107_finalToolClass
 //
 //  Created by ma c on 16/1/7.
 //  Copyright (c) 2016年 博文科技. All rights reserved.
 //

 #import "ViewController.h"
 #import "NotificationViewController.h"
 #import "DelegatePassValueViewController.h"

 @interface ViewController ()<UIPickerViewDataSource,UIPickerViewDelegate,PassValueDelegate>
 // 日期拾取器
 @property (strong, nonatomic) UIDatePicker *datePicker;
 @property (strong, nonatomic) UILabel *lblShowDate;

 // 拾取器
 @property (strong, nonatomic) UIPickerView *pickerView;
 @property (strong, nonatomic) UILabel *lblShowPickerView;
 @property (strong, nonatomic) UILabel *lblShowPickerView1;
 @property (strong, nonatomic) UILabel *lblShowPickerView2;
 @property (strong, nonatomic) UILabel *lblShowPickerView3;
 @property (strong, nonatomic) NSMutableArray *pickerDataSource;

 //动态图
 @property (strong, nonatomic) UIImageView *gifImgView;

 //通知传值
 @property (strong, nonatomic) UILabel *lblNotification;
 //代理传值
 @property (strong, nonatomic) UILabel *lblDelegate;

 @end

 @implementation ViewController

 /*
  1.日期拾取器：UIDatePicker
  2.拾取器：   UIPickerView
  3.动态图：
  4.通知传值：
  5.代理传值：ps-Block(界面传值)
  6.网页视图： UIWebView

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  */

 - (void)viewDidLoad {
     [super viewDidLoad];
     [self.view setBackgroundColor:[UIColor groupTableViewBackgroundColor]];
     //[self createDatePicker];
     //[self createPickerView];
     //[self createGifImageView];
     //[self createNotificationByValue];
     //[self createDelegatePassValue];
     [self createWebView];
 }
 #pragma mark - 网页视图
 - (void)createWebView
 {
     UIWebView *webView = [[UIWebView alloc] initWithFrame:self.view.bounds];

     //创建[全球支援定位器]
     NSURL *baiduURL = [NSURL URLWithString:@"http://www.baidu.com"];

     //创建网络请求
     NSURLRequest *baiduRequest = [NSURLRequest requestWithURL:baiduURL];

     //网页视图加载[网络请求]
     [webView loadRequest:baiduRequest];

     //添加网页视图
     [self.view addSubview:webView];
 }

 #pragma mark - 代理传值

 - (void)createDelegatePassValue
 {
     //创建传递消息的Label
     self.lblDelegate = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     self.lblDelegate.backgroundColor = [UIColor orangeColor];
     self.lblDelegate.textAlignment = NSTextAlignmentCenter;
     [self.view addSubview:self.lblDelegate];
     //创建跳转按钮
     UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
     [btn setFrame:CGRectMake(, , , )];
     [btn setTitle:@"gotoNextView" forState:UIControlStateNormal];
     [btn setBackgroundColor:[UIColor purpleColor]];
     [btn addTarget:self action:@selector(detegatePassValue) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:btn];

 }

 - (void)detegatePassValue
 {
     DelegatePassValueViewController *delegateVC = [[DelegatePassValueViewController alloc] init];
     //设置代理传值界面的delegate是当前的VC
     delegateVC.delegate = self;

     [self presentViewController:delegateVC animated:YES completion:nil];
 }
 //代理传值的协议方法- 回调方法
 - (void)my_passValue:(NSString *)str
 {
     self.lblDelegate.text = str;
 }

 #pragma mark - 通知传值
 - (void)createNotificationByValue
 {
     //创建传递消息的Label
     self.lblNotification = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     self.lblNotification.backgroundColor = [UIColor orangeColor];
     self.lblNotification.textAlignment = NSTextAlignmentCenter;
     [self.view addSubview:self.lblNotification];
     //创建跳转按钮
     UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
     [btn setFrame:CGRectMake(, , , )];
     [btn setTitle:@"gotoNextView" forState:UIControlStateNormal];
     [btn setBackgroundColor:[UIColor purpleColor]];
     [btn addTarget:self action:@selector(gotoNextView) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:btn];

     //想通知中心注册观察者
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getSecret:) name:@"passValue" object:nil];

 }
 // 通知回调
 - (void)getSecret:(NSNotification *)notification
 {
     if ([notification.object isKindOfClass:[NSString class]]) {
         self.lblNotification.text = notification.object;
     }
 }
 //通知传值按钮关联方法
 - (void)gotoNextView
 {
     NotificationViewController *notificationVC = [[NotificationViewController alloc] init];
     [self presentViewController:notificationVC animated:YES completion:nil];
 }
 #pragma mark - gif动态图
 - (void)createGifImageView
 {
     self.gifImgView = [[UIImageView alloc] initWithFrame:CGRectMake(, , , )];
     //创建图片数组
     NSMutableArray *imgArr = [NSMutableArray array];
     for (int i = ; i < ; i++) {
         //获取图片名称
         NSString *imgName = [NSString stringWithFormat:@"0%dda.png",i];
         //根据图片名称获取图片
         UIImage *image = [UIImage imageNamed:imgName];
         //把图片加载到图片数组中
         [imgArr addObject:image];
     }
     //设置动画图片
     [self.gifImgView setAnimationImages:imgArr];
     //播放时间
     [self.gifImgView setAnimationDuration:];
     //重复次数
     [self.gifImgView setAnimationRepeatCount:];
     //开启动画
     [self.gifImgView startAnimating];
     [self.view addSubview:self.gifImgView];
 }

 #pragma mark - 拾取器
 - (void)createPickerView
 {
     self.pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(, , , )];
     self.pickerView.dataSource = self;
     self.pickerView.delegate = self;
     [self.view addSubview:self.pickerView];

     NSArray *arr1 = @[@"苹果",@"香蕉",@"橘子",@"葡萄",@"菩提"];
     NSArray *arr2 = @[@"汽车",@"飞机",@"轮船",@"自行车",@"呵呵"];
     NSArray *arr3 = @[@"",@"",@"",@"",@""];

     self.pickerDataSource = [[NSMutableArray alloc] initWithObjects:arr1,arr2,arr3, nil];
     //拾取器显示标签
     self.lblShowPickerView = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     [self.lblShowPickerView setBackgroundColor:[UIColor orangeColor]];
     self.lblShowPickerView.textAlignment =NSTextAlignmentCenter;
     [self.view addSubview:self.lblShowPickerView];
     //拾取器显示标签arr1
     self.lblShowPickerView1 = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     [self.lblShowPickerView1 setBackgroundColor:[UIColor orangeColor]];
     self.lblShowPickerView1.textAlignment =NSTextAlignmentCenter;
     [self.lblShowPickerView addSubview:self.lblShowPickerView1];

     //拾取器显示标签arr2
     self.lblShowPickerView2 = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     [self.lblShowPickerView2 setBackgroundColor:[UIColor orangeColor]];
     self.lblShowPickerView2.textAlignment =NSTextAlignmentCenter;
     [self.lblShowPickerView addSubview:self.lblShowPickerView2];

     //拾取器显示标签arr3
     self.lblShowPickerView3 = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     [self.lblShowPickerView3 setBackgroundColor:[UIColor orangeColor]];
     self.lblShowPickerView3.textAlignment =NSTextAlignmentCenter;
     [self.lblShowPickerView addSubview:self.lblShowPickerView3];

 }
 #pragma mark - 拾取器的数据源方法
 // 创建分组
 - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
 {
     return self.pickerDataSource.count;
 }
 // 创建分行
 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
 {
     return [[self.pickerDataSource objectAtIndex:component] count];

 }
 #pragma mark - 拾取器的代理方法
 // 设置组宽
 - (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
 {
     return ;
 }
 // 设置行高
 - (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
 {
     return ;
 }
 // 设置行内容
 - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
 {
     return [[self.pickerDataSource objectAtIndex:component] objectAtIndex:row];
 }
 // 选中内容后调用
 - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
 {
     switch (component) {
         case :
             self.lblShowPickerView1.text = [[self.pickerDataSource objectAtIndex:component] objectAtIndex:row];
             break;
         case :
             self.lblShowPickerView2.text = [[self.pickerDataSource objectAtIndex:component] objectAtIndex:row];
             break;
         case :
             self.lblShowPickerView3.text = [[self.pickerDataSource objectAtIndex:component] objectAtIndex:row];
             break;

         default:
             break;
     }
 }

 #pragma mark - 日期拾取器
 - (void)createDatePicker
 {
     //日期拾取器（ps:拾取器的高度锁定不变）
     self.datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(, , , )];
     //不管设置日期拾取器的日期格式如何，拾取器实际确定的时间都是完整的时刻
     self.datePicker.datePickerMode = UIDatePickerModeDate;
     [self.datePicker setDate:[NSDate date]];
     [self.datePicker addTarget:self action:@selector(dateChange) forControlEvents:UIControlEventValueChanged];
     [self.view addSubview:self.datePicker];
     //日期显示标签
     self.lblShowDate = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
     [self.lblShowDate setBackgroundColor:[UIColor orangeColor]];
     self.lblShowDate.textAlignment = NSTextAlignmentCenter;
     [self.view addSubview:self.lblShowDate];
 }
 #pragma mark - 日期拾取器关联方法
 - (void)dateChange
 {
     NSLog(@"%@",self.datePicker.date);
     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
     [formatter setDateFormat:@"YYYY-MM-dd HH:MM:ss"];
     NSString *dateStr = [formatter stringFromDate:self.datePicker.date];
     self.lblShowDate.text = dateStr;

 }

 #pragma mark - 状态栏

 - (BOOL)prefersStatusBarHidden
 {
     return YES;
 }

 @end

 #import <UIKit/UIKit.h>

 @interface NotificationViewController : UIViewController

 @end

 #import "NotificationViewController.h"

 @interface NotificationViewController ()

 @end

 @implementation NotificationViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     [self.view setBackgroundColor:[UIColor cyanColor]];

     UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
     [btn setFrame:CGRectMake(, , , )];
     [btn setTitle:@"passValue" forState:UIControlStateNormal];
     [btn setBackgroundColor:[UIColor purpleColor]];
     [btn addTarget:self action:@selector(passValue) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:btn];

 }
 - (void)passValue
 {
     //返回上一次模态视图
     [self dismissViewControllerAnimated:YES completion:nil];

     NSString *str = @"here is a secret";

     //发送带消息的通知
     [[NSNotificationCenter defaultCenter] postNotificationName:@"passValue" object:str];
 }

 @end

 #import <UIKit/UIKit.h>

 @protocol PassValueDelegate <NSObject>

 - (void)my_passValue:(NSString *)str;

 @end

 @interface DelegatePassValueViewController : UIViewController

 //实现协议的代理
 @property(strong, nonatomic) id<PassValueDelegate> delegate;

 @end

 #import "DelegatePassValueViewController.h"

 @interface DelegatePassValueViewController ()

 @end

 @implementation DelegatePassValueViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     [self.view setBackgroundColor:[UIColor cyanColor]];

     UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
     [btn setFrame:CGRectMake(, , , )];
     [btn setTitle:@"passValueBack" forState:UIControlStateNormal];
     [btn setBackgroundColor:[UIColor purpleColor]];
     [btn addTarget:self action:@selector(passValueBack) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:btn];
 }

 - (void)passValueBack
 {
     [self dismissViewControllerAnimated:YES completion:nil];

     NSString *str = @"another secret";
     //让代理执行协议方法
     if ([self.delegate respondsToSelector:@selector(my_passValue:)]) {
         [self.delegate performSelector:@selector(my_passValue:) withObject:str];
     }
 }

 @end

笔记

 一.UIPickerView
 .UIPickerView的常见属性
 // 数据源(用来告诉UIPickerView有多少列多少行)
 @property(nonatomic,assign) id<UIPickerViewDataSource> dataSource;
 // 代理(用来告诉UIPickerView每1列的每1行显示什么内容,监听UIPickerView的选择)
 @property(nonatomic,assign) id<UIPickerViewDelegate>   delegate;
 // 是否要显示选中的指示器
 @property(nonatomic)        BOOL                       showsSelectionIndicator;
 // 一共有多少列
 @property(nonatomic,readonly) NSInteger numberOfComponents;

 .UIPickerView的常见方法
 // 重新刷新所有列
 - (void)reloadAllComponents;
 // 重新刷新第component列
 - (void)reloadComponent:(NSInteger)component;

 // 主动选中第component列的第row行
 - (void)selectRow:(NSInteger)row inComponent:(NSInteger)component animated:(BOOL)animated;

 // 获得第component列的当前选中的行号
 - (NSInteger)selectedRowInComponent:(NSInteger)component;

 .数据源方法(UIPickerViewDataSource)
 //  一共有多少列
 - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
 //  第component列一共有多少行
 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;

 .代理方法(UIPickerViewDelegate)
 //  第component列的宽度是多少
 - (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component;
 //  第component列的行高是多少
 - (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component;

 //  第component列第row行显示什么文字
 - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;

 //  第component列第row行显示怎样的view(内容)
 - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view;

 //  选中了pickerView的第component列第row行
 - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component;

 二.UIDatePicker
 .常见属性
 // datePicker的显示模式
 @property (nonatomic) UIDatePickerMode datePickerMode;
 // 显示的区域语言
 @property (nonatomic, retain) NSLocale   *locale;

 .监听UIDatePicker的选择
 * 因为UIDatePicker继承自UIControl,所以通过addTarget:...监听

 三.程序启动的完整过程
 .main函数

 .UIApplicationMain
 * 创建UIApplication对象
 * 创建UIApplication的delegate对象

 .delegate对象开始处理(监听)系统事件(没有storyboard)
 * 程序启动完毕的时候, 就会调用代理的application:didFinishLaunchingWithOptions:方法
 * 在application:didFinishLaunchingWithOptions:中创建UIWindow
 * 创建和设置UIWindow的rootViewController
 * 显示窗口

 .根据Info.plist获得最主要storyboard的文件名,加载最主要的storyboard(有storyboard)
 * 创建UIWindow
 * 创建和设置UIWindow的rootViewController
 * 显示窗口