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(30, 120, 315, 50)];
    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(30, 240, 315, 50)];
    [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(30, 120, 315, 50)];
    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(30, 240, 315, 50)];
    [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(50, 300, 100, 100)];
    //创建图片数组
    NSMutableArray *imgArr = [NSMutableArray array];
    for (int i = 0; i < 80; 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:8];
    //重复次数
    [self.gifImgView setAnimationRepeatCount:0];
    //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(10, 150, 355, 300)];
    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 = @[@"11",@"22",@"33",@"44",@"55"];
    
    self.pickerDataSource = [[NSMutableArray alloc] initWithObjects:arr1,arr2,arr3, nil];
    //拾取器显示标签
    self.lblShowPickerView = [[UILabel alloc] initWithFrame:CGRectMake(10, 500, 355, 80)];
    [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(0, 0, 115, 80)];
    [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(115, 0, 115, 80)];
    [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(230, 0, 115, 80)];
    [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 80;
}
// 设置行高
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
    return 50;
}
// 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 0:
            self.lblShowPickerView1.text = [[self.pickerDataSource objectAtIndex:component] objectAtIndex:row];
            break;
        case 1:
            self.lblShowPickerView2.text = [[self.pickerDataSource objectAtIndex:component] objectAtIndex:row];
            break;
        case 2:
            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(10, 200, 355, 300)];
    //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(10, 500, 355, 80)];
    [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(30, 240, 315, 50)];
    [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(30, 240, 315, 50)];
    [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
1.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;

2.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;

3.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;

4.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
1.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;

2.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
1.main函数

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

3.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

3.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