今天项目中需要给键盘加上一个工具栏，功能为实现上一步，下一步的textfield的切换和点击“完成”收起键盘，功能比较简单，就不用第三方的了，于是自己写了一个。

toolBar.png

实现原理是自定义一个toolBar，作为textfield的inputAccessoryView，并把当前界面需要用到工具栏的textfield传给toolBar。
代码如下：

#import <UIKit/UIKit.h>

@interface KeyboardToolBar : UIToolbar

- (instancetype)initWithArray:(NSArray *)array;

@end

#import "KeyboardToolBar.h"

@interface KeyboardToolBar()

@property (strong, nonatomic) NSArray *array;

@end

@implementation KeyboardToolBar

- (instancetype)initWithArray:(NSArray *)array {
    self = [[KeyboardToolBar alloc]initWithFrame:CGRectMake(0,0, kWidth,35)];
    _array = array;
    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(kWidth - 60, 5,50, 25)];
    button.titleLabel.font = [UIFont systemFontOfSize:14];
    [button setTitle:@"完成" forState:UIControlStateNormal];
    [button setTitleColor:UICOLOR_MAKE_RGB(26, 141, 248) forState:UIControlStateNormal];
    button.layer.borderColor = UICOLOR_MAKE_RGB(26, 141, 248).CGColor;
    button.layer.borderWidth = 1;
    button.layer.cornerRadius = 3;
    [button addTarget:self action:@selector(finishBtnClick)forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:button];
    
    if (array.count >= 2) {
        UIButton *backBtn = [[UIButton alloc]initWithFrame:CGRectMake(20, 5, 50, 25)];
        backBtn.titleLabel.font = [UIFont systemFontOfSize:14];
        [backBtn setTitle:@"上一步" forState:UIControlStateNormal];
        [backBtn setTitleColor:UICOLOR_MAKE_RGB(26, 141, 248) forState:UIControlStateNormal];
        [self addSubview:backBtn];
        [backBtn addTarget:self action:@selector(backBtnClick)forControlEvents:UIControlEventTouchUpInside];
        
        UIButton *nextBtn = [[UIButton alloc]initWithFrame:CGRectMake(kWidth - 130, 5, 50, 25)];
        nextBtn.titleLabel.font = [UIFont systemFontOfSize:14];
        [nextBtn setTitle:@"下一步" forState:UIControlStateNormal];
        [nextBtn setTitleColor:UICOLOR_MAKE_RGB(26, 141, 248) forState:UIControlStateNormal];
        [self addSubview:nextBtn];
        [nextBtn addTarget:self action:@selector(nextBtnClick)forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}

- (void)finishBtnClick {
    [_array enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        UITextField *tf = _array[idx];
        [tf resignFirstResponder];
    }];
}

- (void)backBtnClick {
    [_array enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        UITextField *tf = _array[idx];
        if ([tf isFirstResponder] && tf != _array.firstObject) {
            UITextField *nextTf = _array[idx - 1];
            [nextTf becomeFirstResponder];
            *stop = YES;
        } else {
            [tf resignFirstResponder];
        }
    }];
}

- (void)nextBtnClick {
    [_array enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        UITextField *tf = _array[idx];
        if ([tf isFirstResponder] && tf != _array.lastObject) {
            UITextField *nextTf = _array[idx + 1];
            [nextTf becomeFirstResponder];
            *stop = YES;
        } else {
            [tf resignFirstResponder];
        }
    }];
}

@end

实现方法：

KeyboardToolBar *bar = [[KeyboardToolBar alloc]initWithArray:@[_phoneTf,_noteTF]];
    self.phoneTf.inputAccessoryView = bar;
    self.noteTF.inputAccessoryView = bar;

https://github.com/yiyc2008/KeyboardToolBar