iOS自定义键盘的简单实现

自定义键盘类VolumeInputKeyboardView:

VolumeInputKeyboardView.h文件：

 #import <UIKit/UIKit.h>

 NS_ASSUME_NONNULL_BEGIN

 @interface VolumeInputKeyboardView : UIView

 @property(weak, nonatomic) UITextField *m_textField;

 @end

 NS_ASSUME_NONNULL_END

VolumeInputKeyboardView.m文件：

 switch  ::

 #import <UIKit/UIKit.h>

 NS_ASSUME_NONNULL_BEGIN

 @interface VolumeInputKeyboardView : UIView

 @property(weak, nonatomic) UITextField *m_textField;

 @end

 NS_ASSUME_NONNULL_END

 switch  ::

 #import "VolumeInputKeyboardView.h"

 #import "CommonFunc.h"

 @implementation VolumeInputKeyboardView

 - (instancetype)initWithFrame:(CGRect)frame

 {

     self = [super initWithFrame:frame];

     if (self) {

         [self createTopBar];

         float width = (CGRectGetWidth(self.frame) - ) / ;

         for(int i = ; i < ; ++i)

         {

             [self createKey:[NSString stringWithFormat:@"%d",i] posX:(width * ((i - ) % ) + ((i - ) % )) posY:( +  * ((i - )/)) width:width height:];

         }

         [self createKey:@"" posX: posY:( +  * ) width:(width *  + ) height:];

         [self createKey:@"←" posX:(width *  + ) posY:( +  * ) width:(width) height:];

         [self createKey:@"+" posX:(width + ) *  posY: width:width height:];

         [self createKey:@"-" posX:(width + ) *  posY:( +  * ) width:(width) height:];

     }

     return self;

 }

 - (void)createTopBar

 {

     UIView *topView = [UIView new];

     [topView setBackgroundColor:[UIColor darkGrayColor]];

     [self addSubview:topView];

     topView.frame = CGRectMake(, , CGRectGetWidth(self.frame), );

     UILabel *lbInfo = [[UILabel alloc]initWithFrame:CGRectMake(, , CGRectGetWidth(topView.frame) /  *  - , CGRectGetHeight(topView.frame))];

     [topView addSubview:lbInfo];

     [lbInfo setText:@"一些提示信息"];

     [lbInfo setLineBreakMode:NSLineBreakByWordWrapping];

     [lbInfo setNumberOfLines:];

     [lbInfo setFont:[UIFont systemFontOfSize:]];

     [lbInfo setTextColor:[UIColor whiteColor]];

     UIButton *btnFinish = [[UIButton alloc]initWithFrame:CGRectMake(CGRectGetWidth(topView.frame) /  * , , CGRectGetWidth(topView.frame) /  , CGRectGetHeight(topView.frame))];

     [topView addSubview:btnFinish];

     [btnFinish setTitle:@"完成" forState:UIControlStateNormal];

     [btnFinish setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

     [btnFinish setBackgroundImage:[CommonFunc imageWithColor:[UIColor orangeColor]] forState:UIControlStateHighlighted];

     [btnFinish addTarget:self action:@selector(hideKeyboard) forControlEvents:UIControlEventTouchUpInside];

 }

 - (void)createKey:(NSString *)title posX:(float)posX posY:(float)posY width:(float)width height:(float)height

 {

     UIButton *btnKey = [[UIButton alloc]initWithFrame:CGRectMake(posX, posY, width, height)];

     [self addSubview:btnKey];

     [btnKey addTarget:self action:@selector(buttonDidClicked:) forControlEvents:UIControlEventTouchUpInside];

     [btnKey setTitle:title forState:UIControlStateNormal];

     [btnKey setBackgroundColor:[UIColor lightGrayColor]];

     [btnKey setBackgroundImage:[CommonFunc imageWithColor:[UIColor orangeColor]] forState:UIControlStateHighlighted];

 }

 - (void)buttonDidClicked:(UIButton*)sender

 {

     self.m_textField.text = sender.titleLabel.text;

 }

 -(void)layoutSubviews{

     [super layoutSubviews];

 }

 - (void)hideKeyboard

 {

     //隐藏键盘

     [self.m_textField endEditing:YES];

 }

 @end

调用的地方：

 VolumeInputKeyboardView *volumeKeyboard = [[VolumeInputKeyboardView alloc]initWithFrame:CGRectMake(, , SCREEN_WIDTH, )];

     volumeKeyboard.m_textField = self.m_textField;

     //设置输入框的键盘为自定义的键盘

     self.textField.inputView = volumeKeyboard;

最终实现的键盘效果如下：