iphone - 在ios中使用自定义键盘的问题

Question

我已经从this下载了一个示例项目使用自定义键盘的链接。

它工作得很好。

但是，当我在项目中使用它时，它返回一个错误 - -[UIView playKeyboardClick]: 无法识别的选择器发送到实例 0x71d6390

我做了什么 -

我为 NerdKeyboardView.h 添加了新的 viewcontoller 文件 NerdKeyboard.h 和 NerdKeyboard.m 以及 UIView 文件和 NerdKeyboardView.m。我从示例项目中粘贴了相同的代码，并在 xib 中进行了相同的设计。

但是当我单击 NerdKeyboard.xib 文件中的按钮时，它会返回错误

由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因:“-[UIView playKeyboardClick]:无法识别的选择器发送到实例 0x71d6390” *** 首先抛出调用栈: (0x1c92012 0x10cfe7e 0x1d1d4bd 0x1c81bbc 0x1c8194e 0x2769 0x10e3705 0x172c0 0x17258 0xd8021 0xd857f 0xd76e8 0x46cef 0x46f02 0 x24d4a 0x16698 0x1beddf9 0x1bedad0 0x1c07bf5 0x1c07962 0x1c38bb6 0x1c37f44 0x1c37e1b 0x1bec7e3 0x1bec668 0x13ffc 0x1ebd 0x1de5) libc++abi.dylib:终止调用抛出异常

如果您想查看代码:

NerdKeyboard.h

#import <UIKit/UIKit.h>

@interface NerdKeyboard : UIViewController

@property (nonatomic, weak) id delegate;

- (IBAction)keyPress:(id)sender;
- (IBAction)doneEditing:(id)sender;

@end

NerdKeyboard.m

#import "NerdKeyboard.h"
#import "NerdKeyboardView.h"

@implementation NerdKeyboard

- (IBAction)keyPress:(id)sender
{
   [(NerdKeyboardView *)self.view playKeyboardClick];

   if (self.delegate && [self.delegate respondsToSelector:@selector(setText:)]) {
       NSString *oldText = [self.delegate text];
       NSString *thisKey = [[(UIButton *)sender titleLabel] text];

       [self.delegate performSelector:@selector(setText:) withObject:[oldText stringByAppendingString:thisKey]];
   } else if (self.delegate && [self.delegate respondsToSelector:@selector(nerdKeyPress:)]) {
       [self.delegate performSelector:@selector(nerdKeyPress:) withObject:[[(UIButton *)sender titleLabel] text]];
   }
}

- (IBAction)doneEditing:(id)sender
{
   if (self.delegate && [self.delegate respondsToSelector:@selector(resignFirstResponder)]) {
       [self.delegate performSelector:@selector(resignFirstResponder)];
   }
}

@end

NerdKeyboardView.h

#import <UIKit/UIKit.h>

@interface NerdKeyboardView : UIView <UIInputViewAudioFeedback>

- (void)playKeyboardClick;

@end 

NerdKeyboardView.m

#import "NerdKeyboardView.h"

@implementation NerdKeyboardView

- (BOOL)enableInputClicksWhenVisible {
    return YES;
}

- (void)playKeyboardClick
{
    [[UIDevice currentDevice] playInputClick];
}

@end

当我调试它时，错误在行中抛出 [(NerdKeyboardView *)self.view playKeyboardClick];

可能是什么问题？

如有任何建议，我们将不胜感激。

Answer 1

如果连接不正确或者操作系统无法找到定义的函数，就会出现这种错误。如果您使用的是xib，请检查连接是否更正确。否则请检查函数setText 书写正确。可能大小写或函数名称有问题。