Question

我是目标C的IOS编程的新手。我没有太多的经验，希望得到一些帮助。

以下是描述错误的输出：2013-08-08 17：48：47.957 multMachine [57549：c07] - [ViewController播放：]：无法识别的选择器发送到实例0x7578870 2013-08-08 17：48：47.959 multMachine [57549：c07] * 由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：' - [ViewController play：]：无法识别的选择器发送到实例0x7578870 “

//  ViewController.h
//  multMachine
//
//  Created by Danny Takeuchi on 8/7/13.
//  Copyright (c) 2013 Danny Takeuchi. All rights reserved.
//

#import <UIKit/UIKit.h>
NSString *questionList[100];
@interface ViewController : UIViewController
@property (weak, nonatomic) IBOutlet UIButton *playButton;
@property (weak, nonatomic) IBOutlet UILabel *question;
@property (weak, nonatomic) IBOutlet UITextField *answer;
- (IBAction)prepareQuestion:(id)sender;
- (IBAction)process:(id)sender;
@property (weak, nonatomic) IBOutlet UIButton *checkAnswer;

@end







//
//  ViewController.m
//  multMachine
//
//  Created by Danny Takeuchi on 8/7/13.
//  Copyright (c) 2013 Danny Takeuchi. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (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.
}


- (IBAction)process:(id)sender {

}
- (IBAction)prepareQuestion:(id)sender {
    int z=0;
    while(z<=100){
        for(int x=1;x<=10;x++){
            for(int y=1;y<=10;y++){
                questionList[z]=[[[NSString stringWithFormat:@"%d",x] stringByAppendingString:@"*"] stringByAppendingString:[NSString stringWithFormat:@"%d",y]];
            }
        }
    }
    [_question setText:questionList[random()%100]];
}
@end

Answer 1

你什么时候收到这个错误？是你按下播放按钮的时候？您是否创建并连接了-(IBAction)play:(id)sender;并删除了它？

运行时错误tns无效的参数异常

1 个答案: