无法切换到数字键盘iOS

Question

我的应用不允许用户将键盘切换到数字/字符键盘。

我的UI Inspector中没有任何内容显示在屏幕底部。

我真的很难过可能导致这个问题的原因。无论它是什么阻止数字/符号切换器，键盘语言（或表情符号）选择器和语音到文本按钮。同一行的空格键和返回键继续正常运行。

受影响的UITextField是子类，键盘在包含它们的其他5个视图中按预期工作，但这是他们的代码：

JCTextField.h

#import <UIKit/UIKit.h>

IB_DESIGNABLE
@interface JCTextField : UITextField

@property (nonatomic, retain) IBInspectable UIColor *underlineColor;
@property (nonatomic) IBInspectable CGFloat underlineWidth;
@property (nonatomic, retain) IBInspectable UIImage *sideImage;
@property (nonatomic) IBInspectable CGFloat internalOffset;
@property (nonatomic) IBInspectable CGFloat borderOffset;

@end

JCTextField.m

#import "JCTextField.h"

@implementation JCTextField

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if(self != nil) {
        self.underlineColor = [UIColor blackColor];
        self.underlineWidth = 1;
        self.internalOffset = 0;
        self.borderOffset = 0;
    }
    return self;
}

- (void)layoutSubviews {
    [super layoutSubviews];
    CALayer *border = [CALayer layer];
    border.borderColor = _underlineColor.CGColor;
    border.frame = CGRectMake(_borderOffset, self.frame.size.height - _underlineWidth, self.frame.size.width - (_borderOffset * 2), self.frame.size.height);
    border.borderWidth = _underlineWidth;
    [self.layer addSublayer:border];
    self.layer.masksToBounds = YES;


    [self setValue:[UIColor lightTextColor] forKeyPath:@"_placeholderLabel.textColor"];
    [self setTextColor:[UIColor whiteColor]];
    [self setFont:[UIFont fontWithName:@"Montserrat-Regular" size:16.0]];


    if (self.sideImage) {
        UIImageView *sideImageView = [[UIImageView alloc] initWithFrame:CGRectMake(self.frame.size.width - 30, 0, 30, 30)];
        sideImageView.contentMode = UIViewContentModeCenter;
        sideImageView.image = self.sideImage;
        [self addSubview:sideImageView];
    }

    [self setTintColor:[UIColor whiteColor]];

    [self setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];

}

- (CGRect)textRectForBounds:(CGRect)bounds {
    if (self.sideImage) {
        UIEdgeInsets insets = UIEdgeInsetsMake(0, _internalOffset, 0, 18);
        return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, insets)];
    }
    UIEdgeInsets insets = UIEdgeInsetsMake(0, _internalOffset, 0, 0);
    return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, insets)];
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    if (self.sideImage) {
        UIEdgeInsets insets = UIEdgeInsetsMake(0, _internalOffset, 0, 18);
        return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, insets)];
    }
    UIEdgeInsets insets = UIEdgeInsetsMake(0, _internalOffset, 0, 0);
    return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, insets)];
}

@end