最后效果图:

Main.storyboard

KeyboardTool.xib

KeyboardTool.h

//  KeyboardTool.h//  键盘处理//  Created by beyond on 14-8-24.//  Copyright (c) 2014年 com.beyond. All rights reserved.#import 
     
      @protocol KeyboardToolDelegate;typedef enum {    kKeyboardToolButtonTypeNext, // 下一个button    kKeyboardToolButtonTypePrevious, // 上一个button    kKeyboardToolButtonTypeDone // 完毕button} KeyboardToolButtonType;@interface KeyboardTool : UIToolbar// 上一个button控件@property (nonatomic, weak) IBOutlet UIBarButtonItem *previousBtn;// 下一个button控件@property (nonatomic, weak) IBOutlet UIBarButtonItem *nextBtn;// 完毕button控件@property (nonatomic, weak) IBOutlet UIBarButtonItem *doneBtn;// 代理一般用weak,同一时候,避免与默认的继承的delegate冲突@property (nonatomic, weak) id
      
        toolDelegate;// 类方法 返回一个实例对象+ (id)keyboardTool;// 监听工具条上 三个button的点击 事件- (IBAction)previousBtnClicked;- (IBAction)nextBtnClicked;- (IBAction)doneBtnClicked;@end
      
     

KeyboardTool.m

//  KeyboardTool.m//  键盘处理//  Created by beyond on 14-8-24.//  Copyright (c) 2014年 com.beyond. All rights reserved.#import "KeyboardTool.h"#import "KeyboardToolDelegate.h"@implementation KeyboardTool// 类方法,从xib文件里初始化一个KeyboardTool+ (id)keyboardTool {    // owner能够传KeyboardTool这个类    // 点击"下一个"button的时候。要调用owner的next方法        NSArray *array = [[NSBundle mainBundle] loadNibNamed:@"keyboardTool" owner:nil options:nil];        // 返回初始化完毕的KeyboardTool对象    return array[0];}#pragma mark - 点击事件// 点击了上一个button- (void)previousBtnClicked {    if ([_toolDelegate respondsToSelector:@selector(keyboardTool:buttonType:)]) {        // 告诉代理,点击的是上一个button        [_toolDelegate keyboardTool:self buttonType:kKeyboardToolButtonTypePrevious];    }}// 点击了下一个button- (void)nextBtnClicked {    if ([_toolDelegate respondsToSelector:@selector(keyboardTool:buttonType:)]) {        // 告诉代理,点击的是下一个button        [_toolDelegate keyboardTool:self buttonType:kKeyboardToolButtonTypeNext];    }}// 点击了完毕button- (void)doneBtnClicked {    if ([_toolDelegate respondsToSelector:@selector(keyboardTool:buttonType:)]) {        // 告诉代理,点击的是完毕button        [_toolDelegate keyboardTool:self buttonType:kKeyboardToolButtonTypeDone];    }}@end

KeyboardToolDelegate.h

////  KeyboardToolDelegate.h//  22_键盘综合案例////  Created by beyond on 14-8-24.//  Copyright (c) 2014年 com.beyond. All rights reserved.//#import 
     
      @class KeyboardTool;@protocol KeyboardToolDelegate 
      
       - (void)keyboardTool:(KeyboardTool *)tool buttonType:(KeyboardToolButtonType)type;@end
      
     

BeyondViewController.h

////  BeyondViewController.h//  22_键盘综合案例////  Created by beyond on 14-8-24.//  Copyright (c) 2014年 com.beyond. All rights reserved.//#import 
     
      #import "KeyboardTool.h"#import "KeyboardToolDelegate.h"@interface BeyondViewController : UIViewController 
      
       // 生日输入框@property (weak, nonatomic) IBOutlet UITextField *birthdayTextField;// 城市输入框@property (weak, nonatomic) IBOutlet UITextField *cityTextField;@end
      
     

BeyondViewController.m

////  BeyondViewController.m//  22_键盘综合案例////  Created by beyond on 14-8-24.//  Copyright (c) 2014年 com.beyond. All rights reserved.//#import "BeyondViewController.h"@interface BeyondViewController ()// 全部省名组成的数组@property (nonatomic, strong) NSArray *provinceNameArr;// 字典:省名key---value城市名组成的数组@property (nonatomic, strong) NSDictionary *provinceName_cities_Dict;// 当前激活的活跃状态的输入框@property (nonatomic, weak) UITextField *currentTextField;// 键盘上的工具条@property (nonatomic, weak) KeyboardTool *tool;// 全部输入框控件 组成的数组@property (nonatomic, strong) NSMutableArray *allTextFields;@end@implementation BeyondViewController- (void)viewDidLoad{    [super viewDidLoad];        self.allTextFields = [NSMutableArray array];    // 类方法,实例化一个KeyboardTool对象    self.tool = [KeyboardTool keyboardTool];    self.tool.backgroundColor = [UIColor clearColor];    self.tool.barTintColor = [UIColor lightGrayColor];    	// 而且设置键盘工具的代理为当前控制器,用于接收其内部的btn点击事件,感知btnType    self.tool.toolDelegate = self;            // 1.设置全部文本框的键盘工具条 都是 自己定义的KeyboardTool    for (UITextField *field in self.view.subviews)    {		// 假设不是文本输入框,继续        if (![field isKindOfClass:[UITextField class]]) continue;        		// 每个文本输入框的键盘工具都是它...        field.inputAccessoryView = self.tool;		// 数组保存全部的文本输入框控件,后面要用到        [self.allTextFields addObject:field];        // 设置每个文本输入框的代理都是当前控制器        field.delegate = self;    }            // 2.为生日输入框,设置键盘为DatePicker    [self setInputViewForBirthdayTextField];            // 3.为城市输入框,设置键盘为DatePicker    [self  setInputViewForCityTextField];        // 4.载入全部的数据    [self  loadAllData];    }// 2.为生日输入框,设置键盘为DatePicker- (void)setInputViewForBirthdayTextField{    // 设置生日的键盘(不用设置宽高和位置)    UIDatePicker *datePicker = [[UIDatePicker alloc] init];    // 设置区域为中国中文简体    datePicker.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];    // 模式为:仅仅显示日期    datePicker.datePickerMode = UIDatePickerModeDate;    // 监听datePicker的值改事件    [datePicker addTarget:self action:@selector(datePickerValueChangeed:) forControlEvents:UIControlEventValueChanged];    // 设置其为生日输入框的view    self.birthdayTextField.inputView = datePicker;}// 3.为城市输入框,设置键盘为DatePicker- (void)setInputViewForCityTextField{    // 设置城市的键盘    UIPickerView *picker = [[UIPickerView alloc] init];    // 设置数据源和代理    picker.dataSource = self;    picker.delegate = self;    // 显示指示器    picker.showsSelectionIndicator = YES;    // 设置其为城市输入框的view    self.cityTextField.inputView = picker;}// 4.载入全部的数据- (void)loadAllData{    // 载入省份数据    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"cities" ofType:@"plist"]];    // 全部以省名组成的数组    self.provinceNameArr = dict[@"provinces"];    // 字典,键是省名,值是城市名组成的数组    self.provinceName_cities_Dict = dict[@"cities"];}// 2.1监听生日选择控件的值改变事件,为生日输入框赋值- (void)datePickerValueChangeed:(UIDatePicker *)picker{    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];    formatter.dateFormat = @"yyyy-MM-dd";    // 生日输入框赋值    self.birthdayTextField.text = [formatter stringFromDate:picker.date];}#pragma mark - PickerView数据源方法// 一共多少列- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{    // 第一列是省名,第二列是省名相应的城市数组    return 2;}// 每一列相应多少行- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{    if (component == 0) {        // 返回省名数组的长度        return self.provinceNameArr.count;    } else {        // 返回第1列   当前选中的行号        NSUInteger rowNum = [pickerView selectedRowInComponent:0];        // 先从省名数组,取出相应的省名        NSString *pName = self.provinceNameArr[rowNum];        // 再从字典中,通过省名,获取城市数组,并返回其长度        NSArray *cityArr = self.provinceName_cities_Dict[pName];        return cityArr.count;    }}// 每列每行显示什么数据- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{    if (component == 0) {		//前一列,显示省名        return self.provinceNameArr[row];    } else {        // 返回第1列   当前选中的行号        NSUInteger rowNum = [pickerView selectedRowInComponent:0];        // 先从省名数组,取出相应的省名        NSString *pName = self.provinceNameArr[rowNum];        // 再从字典中,通过省名,获取城市数组,并返回其长度        NSArray *cityArr = self.provinceName_cities_Dict[pName];        return cityArr[row];    }}// UIPickerView选中了某一行就会调用- (void)pickerView:(UIPickerView *)pickerView      didSelectRow:(NSInteger)row inComponent:(NSInteger)component{    // 刷新后一列的数据,联动效果    [pickerView reloadComponent:1];        NSUInteger pRowNum = [pickerView selectedRowInComponent:0];    // 先从省名数组,取出相应的省名    NSString *pName = self.provinceNameArr[pRowNum];            NSUInteger cRowNum = [pickerView selectedRowInComponent:1];    // 再从字典中,通过省名,获取城市数组,并返回其相应的城市名    NSArray *cityArr = self.provinceName_cities_Dict[pName];    NSString *cName = cityArr[cRowNum];    // 城市输入框赋值    self.cityTextField.text = [NSString stringWithFormat:@"%@ %@", pName, cName];}#pragma mark - 重点!!!!!!!!keyboardTool代理方法- (void)keyboardTool:(KeyboardTool *)tool         buttonType:(KeyboardToolButtonType)type{	    if (type == kKeyboardToolButtonTypeDone) {		//当点击完毕时,当前活动的输入框,取消第一响应者,退出键盘        [self.currentTextField resignFirstResponder];    } else {		//先取出当前输入框在输入框数组中的索引,        NSUInteger index = [self.allTextFields indexOfObject:self.currentTextField];        if (type == kKeyboardToolButtonTypePrevious) {            //当点击上一个时,索引减1,            index--;        } else {            //当点击下一个时,索引加1,            index++;        }		// 取出相应索引的输入框,成为即将成为的第一响应者,调出相应的键盘        UITextField *field = self.allTextFields[index];        [field becomeFirstResponder];    }}#pragma mark - 重点!!!!!!!UITextField代理方法- (void)textFieldDidBeginEditing:(UITextField *)textField{        // 记住被激活的文本框,其它方法keyboardTool:buttonClick:中要用到    self.currentTextField = textField;        // 先取得本输入框在全部输入框组成的数组中的索引    NSUInteger index = [self.allTextFields indexOfObject:textField];	// 设置下一个按钮的,是否可用    self.tool.nextBtn.enabled = index != self.allTextFields.count - 1;	// 设置上一个按钮的,是否可用    self.tool.previousBtn.enabled = index != 0;        }// 这个是 UITextField的一个托付方法！// 利用这个托付 我们在打开键盘的时候。点击return 就能够关闭键盘了- (BOOL)textFieldShouldReturn:(UITextField *)textField{    // 结束全部编辑,退出全部键盘,而且返回YES就能够    [self.view endEditing:YES];    return YES;}@end

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