// 工具條
// HMKeyboardTool.h
#import <UIKit/UIKit.h>

typedef enum {
    KeyboardItemTypePrevious,//上一個
    KeyboardItemTypeNext,//下一個
    KeyboardItemTypeDone//完成
}KeyboardItemType;

@class HMKeyboardTool;

@protocol HMKeyboardToolDelegate <NSObject>

-(void)keyboardTool:(HMKeyboardTool *)keyboardTool didClickItemType:(KeyboardItemType)itemType;

@end

@interface HMKeyboardTool : UIView

//添加代理
@property(nonatomic,weak)id<HMKeyboardToolDelegate> delgate;

+ (instancetype)keyboardTool;

@end

// HMKeyboardTool.m
#import "HMKeyboardTool.h"

@interface HMKeyboardTool()

- (IBAction)previous:(id)sender;
- (IBAction)next:(id)sender;
- (IBAction)done:(id)sender;

@end

@implementation HMKeyboardTool

+ (instancetype)keyboardTool{
    return [[[NSBundle mainBundle] loadNibNamed:@"HMKeyboardTool" owner:nil options:nil] lastObject];
}

//上一個
- (IBAction)previous:(id)sender {

    //判斷代理有沒有實(shí)現(xiàn)相應(yīng)的方法
    if ([self.delgate respondsToSelector:@selector(keyboardTool:didClickItemType:)]) {
        [self.delgate keyboardTool:self didClickItemType:KeyboardItemTypePrevious];
    }
}

//下一個
- (IBAction)next:(id)sender {
    //判斷代理有沒有實(shí)現(xiàn)相應(yīng)的方法
    if ([self.delgate respondsToSelector:@selector(keyboardTool:didClickItemType:)]) {
        [self.delgate keyboardTool:self didClickItemType:KeyboardItemTypeNext];
    }

}
//完成
- (IBAction)done:(id)sender {

    //判斷代理有沒有實(shí)現(xiàn)相應(yīng)的方法
    if ([self.delgate respondsToSelector:@selector(keyboardTool:didClickItemType:)]) {
        [self.delgate keyboardTool:self didClickItemType:KeyboardItemTypeDone];
    }
}
@end

HMKeyboardTool.xib圖:

// HMViewController.h
#import <UIKit/UIKit.h>

@interface HMViewController : UIViewController

@end

// HMViewController.m
#import "HMViewController.h"
#import "HMKeyboardTool.h"

@interface HMViewController ()<HMKeyboardToolDelegate>{

    NSArray *_fields;//存儲所有的textField
}
@property (weak, nonatomic) IBOutlet UITextField *birthdayField;
@property (weak, nonatomic) IBOutlet UIView *inputContainer;//輸入框容器view

@end

@implementation HMViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    //1.初始化自定議鍵盤
    [self setupCustomKeyboard];

    //2.設(shè)置每一個textfield的鍵盤工具view（inputAccessoryView）
    [self setupKeyboardTool];

    //3.監(jiān)聽鍵盤的事件
    [self setupKeyoardNotification];
}


//1.初始化自定議鍵盤
-(void)setupCustomKeyboard{
    UIDatePicker *datePicker = [[UIDatePicker alloc] init];
    datePicker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];
    datePicker.datePickerMode = UIDatePickerModeDate;
    self.birthdayField.inputView = datePicker;
}

//設(shè)置每一個textfield的鍵盤工具view（inputAccessoryView）
-(void)setupKeyboardTool{

    //創(chuàng)建工具欄
    HMKeyboardTool *tool = [HMKeyboardTool keyboardTool];
    //設(shè)置代理
    tool.delgate = self;
    //1.獲取輸入框窗口所有子控件
    NSArray *views = self.inputContainer.subviews;
    //創(chuàng)建一個數(shù)據(jù)存儲textfield
    NSMutableArray *fieldsM = [NSMutableArray array];
    //2.遍歷
    for (UIView *child in views) {
        //如果子控制是UITextField的時候，設(shè)置inputAccessoryView
        if ([child isKindOfClass:[UITextField class]]) {
            UITextField *tf = (UITextField *)child;
            tf.inputAccessoryView = tool;
            //把textfield添加到數(shù)組
            [fieldsM addObject:tf];
        }
    }
    _fields = fieldsM;
}


-(void)dealloc{
    // 刪除在控制器上的通知
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

//3.監(jiān)聽鍵盤的事件
-(void)setupKeyoardNotification{
    [[NSNotificationCenter  defaultCenter] addObserver:self selector:@selector(kbFrameChange:) name:UIKeyboardWillChangeFrameNotification object:nil];
}

//鍵盤的frame的變化
-(void)kbFrameChange:(NSNotification *)nofifi{
    //NSLog(@"%@",nofifi);

    //獲取鍵盤改變化的y值
    //這鍵盤結(jié)束時的frm
    CGRect kbEndFrm =[nofifi.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

    //鍵盤結(jié)束時的y
    CGFloat kbEndY = kbEndFrm.origin.y;

    //獲取當(dāng)前的響應(yīng)者
    int currentIndex = [self getCurrentResponderIndex];
    UITextField *currentTf = _fields[currentIndex];
    CGFloat tfMaxY = CGRectGetMaxY(currentTf.frame) + self.inputContainer.frame.origin.y;

    //如果textfield的最大值在于鍵盤的y坐，才要往上移
    if (tfMaxY > kbEndY) {
        [UIView animateWithDuration:0.25 animations:^{
            self.view.transform = CGAffineTransformMakeTranslation(0, kbEndY - tfMaxY);
        }];
    }else{
        [UIView animateWithDuration:0.25 animations:^{
            self.view.transform = CGAffineTransformIdentity;
        }];
    }
}

#pragma mark 鍵盤工具條的代理
-(void)keyboardTool:(HMKeyboardTool *)keyboardTool didClickItemType:(KeyboardItemType)itemType{
    //獲取當(dāng)前的響應(yīng)者的索引
    int currentIndex = [self getCurrentResponderIndex];
    NSLog(@"當(dāng)前的響應(yīng)者 %d",currentIndex);

    if (itemType == KeyboardItemTypePrevious) {
        // 讓上一個field成功響應(yīng)者
        [self showProviousField:currentIndex];
    }else if(itemType == KeyboardItemTypeNext){
        // 讓下一個field成功響應(yīng)者
        [self showNextField:currentIndex];
    }else{
        [self touchesBegan:nil withEvent:nil];
    }
}

// 獲取當(dāng)前textfield的響應(yīng)者索引
// 如果返回-1代理沒有找響應(yīng)者
-(int)getCurrentResponderIndex{
    //遍歷所有的textfield獲取響應(yīng)者
    for (UITextField *tf in _fields) {
        if (tf.isFirstResponder) {
           return [_fields indexOfObject:tf];
        }
    }
    return -1;
}


//讓上一個field成功響應(yīng)者
-(void)showProviousField:(int)currentIndex{
    int proviousIndex =  currentIndex - 1;
    if (proviousIndex > 0  ) {
        UITextField *proviousTf = [_fields objectAtIndex:proviousIndex];
        [proviousTf becomeFirstResponder];
    }
}

//讓下一個field成功響應(yīng)者
-(void)showNextField:(int)currentIndex{
    int nextIndex =  currentIndex + 1;
    //下一個索引不能超過_fields數(shù)組的個數(shù)
    if (nextIndex < _fields.count) {
        //讓當(dāng)前響應(yīng)者分發(fā)去
        UITextField *currentTf = [_fields objectAtIndex:currentIndex];
        [currentTf resignFirstResponder];

        UITextField *nextTf = [_fields objectAtIndex:nextIndex];
        [nextTf becomeFirstResponder];
    }

}


-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    [self.view endEditing:YES];

    [UIView animateWithDuration:0.25 animations:^{
        self.view.transform = CGAffineTransformIdentity;
    }];
}
@end

效果圖片: