自定义键盘

　　有时候调用苹果手机的系统键盘满足不了现实中的各种需求，因此就需要我们自定义键盘来代替系统原有的键盘

话不多说，直接上代码：

首先代码创建一个输入框或直接在storyboard中拖一个UITextFild来弹出键盘：

   _textField = [[UITextField alloc] init];
    _textField.frame = CGRectMake(60, 200, 200, 30);
    _textField.borderStyle = UITextBorderStyleRoundedRect;
    _textField.keyboardType = UIKeyboardTypeDefault;
    _textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
    _textField.tag = 100;
    _textField.returnKeyType = UIReturnKeyNext;
    
    
    // 自定义键盘
    UIImageView *inputView = [self setInputView];
    _textField.inputView = inputView;
    [self.view addSubview:_textField];

这是用自定义的键盘来覆盖原有的键盘

编辑键盘上的按钮：

#pragma mark - 自定义键盘
- (UIImageView *)setInputView{
    UIImageView *imageView = [[UIImageView alloc] init];
    imageView.userInteractionEnabled = YES;
    
    imageView.frame = CGRectMake(0, 0, 320, 200);
    imageView.backgroundColor = [UIColor grayColor];

    // 自定义键盘内容
    _emojiArray = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12",@"13",@"14",@"15",@"16",@"17"];
    
    CGFloat buttonW = 40;
    CGFloat buttonH = 40;
    NSInteger numberOfRow = ScreenW / buttonW;//列数
    NSInteger numberOfLine = _emojiArray.count / numberOfRow;//行数
    
    if (_emojiArray.count % numberOfRow) {
        numberOfLine = numberOfLine + 1;
    }
    
    for (int j = 0; j < numberOfLine; j ++) {
        
        for (int i = 0; i < numberOfRow; i ++) {
            
            if (i + j * numberOfRow < _emojiArray.count) {
                
                UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
                CGFloat X = 5 + 40 * i;
                CGFloat Y = 5 + buttonH * j;
                button.frame = CGRectMake(X, Y, buttonW, buttonH);
                [button addTarget:self action:@selector(inputViewClick:) forControlEvents:UIControlEventTouchUpInside];
                button.tag = i + j * numberOfRow;
                NSLog(@"button.tag = = = = %ld",button.tag);
                [button setTitle:[_emojiArray objectAtIndex:button.tag] forState:UIControlStateNormal];
                [imageView addSubview:button];
            }
        }
    }
    return imageView;
}

最后实现键盘上的按钮的实现方法：

- (void)inputViewClick:(UIButton *)button{
    NSLog(@"%@",_emojiArray[button.tag]);
    // 拼接
    NSString *str = [NSString stringWithFormat:@"%@%@",_textField.text,_emojiArray[button.tag]];
    _textField.text = str;
}

系统的键盘在弹出的状态下，点击屏幕的空白处收回键盘，那就需要加入下面这段代码来结束按钮的编辑状态：

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

　　效果如图：