Question

我现在没有收到错误但是我的代表没有工作。我正在制作一个自定义键盘，所以我有UIViewController和UIView。我希望UIView在UIViewController中调用sendKeyboardShortCut方法。未调用sendKeyboardShortCut方法。谢谢

// ViewController .h

#import "KeyboardExtension.h"
@interface PageViewController : UIViewController <UITextViewDelegate,sendKeyboardShortCutDelegate> {
   KeyboardExtension *inputAccView;
}
-(void)sendKeyboardShortCut:(NSString*)shortCut;
@property (nonatomic, assign) IBOutlet UITextView *tv;
@end

// ViewController .m

@implementation PageViewController
@synthesize tv;
- (void)viewWillAppear:(BOOL)animated
{
    tv.delegate = self;
}
-(void)createInputAccessoryView{
    inputAccView = [[[KeyboardExtension alloc] init]autorelease];
    inputAccView.delegate = self;
    NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:@"KeyboardExtension" owner:self options:nil];
   inputAccView = [nibObjects objectAtIndex:0];
}
-(void)textViewDidBeginEditing:(UITextView *)textView{
    [self createInputAccessoryView];
    [textView setInputAccessoryView:inputAccView];
}


  -(void)sendKeyboardShortCut:(NSString*)shortCut{
    if ([shortCut isEqualToString:@"dash"] ) {

        NSRange range = tv.selectedRange;
        if((range.location+range.length)<=tv.text.length)
        {
            NSString * before = [tv.text substringToIndex:range.location];
            NSString * after = [tv.text substringFromIndex:range.location+range.length];
            tv.text = [NSString stringWithFormat:@"%@-%@",before,after];
        }


    }
}

@end

//键盘视图.h

#import <UIKit/UIKit.h>
@protocol sendKeyboardShortCutDelegate <NSObject>
-(void)sendKeyboardShortCut:(NSString*)shortCut;
@end
@interface KeyboardExtension : UIView
-(IBAction)dash:(id)sender;
@property(nonatomic,assign) id<sendKeyboardShortCutDelegate>delegate;
@end

//键盘视图.m

#import "KeyboardExtension.h"

@implementation KeyboardExtension
@synthesize delegate;
-(IBAction)dash:(id)sender{[delegate sendKeyboardShortCut:@"dash"];}
@end

Answer 1

我怀疑：

1）你的按钮的目标是nib的文件所有者而不是KeyboardExtension

2）您的操作设置为不发送发件人，因此UIKit调用-comma而不是-comma：

此外，以下代码非常可疑：

inputAccView = [[[KeyboardExtension alloc] init]autorelease];
inputAccView.delegate = self;
NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:@"KeyboardExtension" owner:self options:nil];
inputAccView = [nibObjects objectAtIndex:0];

A）你分配一个你几乎不用的对象，当你用nib的对象立即替换它时

B）从nib（[nibObjects objectAtIndex:0]）中提取对象的方法实际上并不健全。您应该在PageViewController中创建一个IBOutlet并将其链接到nib

我认为你应该重新审视你在这里使用笔尖的方式。

最终（无关）点：您为什么使用[NSString stringWithFormat:@"..."]而不只是@"..."？

由于未捕获的异常'NSInvalidArgumentException'而终止应用程序

1 个答案: