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我对此进行了一些研究，但很遗憾，没有答案。我制作了一台使用 ASCII 码的密码机。没有错误或警告。但是当我运行它时，我得到了这个错误：Thread 1: signal SIGBART。我认为这与 UITextView “编码”有关，但我不确定。编辑：当我单击“编码”按钮（（IBAction）StartEncodeDecode）时发生崩溃。

下面的所有输出日志。不敢相信我是个菜鸟：

2013-08-28 14:00:57.086 Code Machine[2285:11303]-[CMViewController decodeEncode:]：无法识别的选择器发送到实例 0x7151190 2013-08-28 14:00:57.155 Code Machine[2285:11303] * 终止应用程序due to uncaught exception 'NSInvalidArgumentException', reason: '-[CMViewController decodeEncode:]: unrecognized selector sent to instance 0x7151190' * First throw call stack: (0x1c94012 0x10d1e7e 0x1d1f4bd 0x1c83bbc 0x1c8394e 0x10e5705 0x192c0 0x19258 0xda021 0xda57f 0xd96e8 0x48cef 0x48f02 0x26d4a 0x18698 0x1befdf9 0x1befad0 0x1c09bf5 0x1c09962 0x1c3abb6 0x1c39f44 0x1c39e1b 0x1bee7e3 0x1bee668 0x15ffc 0x1ded 0x1d15）libc++abi.dylib：终止调用抛出异常（lldb）

结束编辑。

代码如下：

查看 Controller.m：

#import "CMViewController.h"
#import "CMAEncode.h"

@interface CMViewController ()
@property (weak, nonatomic) IBOutlet UITextView *toCode;
@property (weak, nonatomic) IBOutlet UITextView *coded; //I think the problem is with this text view.
@property (weak, nonatomic) IBOutlet UISwitch *onOrOff;

- (IBAction)StartEncodeDecode:(id)sender;




@end


@implementation CMViewController


- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range
 replacementText:(NSString *)text
{

    if ([text isEqualToString:@"\n"]) {

        [textView resignFirstResponder];
        // Return FALSE so that the final '\n' character doesn't get added
        return NO;
    }
    // For any other character return TRUE so that the text gets added to the view
    return YES;
}
- (IBAction)StartEncodeDecode:(id)sender {

    NSString *finishedText;
    NSString *toCode = self.toCode.text;
    if (self.onOrOff.on == FALSE) {
        finishedText = [CMAEncode encodeText:toCode];
        self.coded.text = finishedText;
    } else { 
    }
}

@end

CMAEncode.m

#import "CMAEncode.h"

@implementation CMAEncode : NSObject 

+ (NSString *) encodeText:(NSString *)text {

    NSString *ToEncode = text;
    NSMutableString *Encoded = [NSMutableString string];
    int letter;
    NSUInteger i = 0;

    while (i < ([ToEncode length] - 1)) {
        letter = [ToEncode characterAtIndex:i];
        NSString *toAppend = [NSString stringWithFormat:@"%d|", letter];
        [Encoded appendString:toAppend];
        i = i + 1;
    }

    return Encoded;




}

@end

这是实际发生错误的类。调用 main.m：

#import <UIKit/UIKit.h>

#import "CMAppDelegate.h"

int main(int argc, char *argv[])
{
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([CMAppDelegate class])); //This is where the error occurred.
    }
}

感谢您的帮助！

4

1 回答 1

0

如果您执行了与名称 " decodeEncode" 链接的 IBAction 操作，请签入 IB ui 元素。可能是因为您已在 IB 中链接它（快速方法是右键单击 IB 上的视图控制器，它将显示所有内容）。似乎您正在通过名称“decodeEncode”执行一些操作，但该方法不存在于您的 CMViewController 类中。旁注如果您确实实施了此方法，您能否说明它的位置？将此方法放入您的CMViewController.m文件并检查日志

- (void)decodeEncode:(NSObject *)sender 
{

 NSLog(@"sending object >> %@", sender); 

}
于 2013-08-29T02:35:16.543 回答