當我們使用storyboard時，我們如何在objective-c中實現自定義init方法？

Question

我用XCode 4.6.3 創建了幾個按鈕和標籤我想要點擊放置在FirstViewController中的按鈕的點擊方法和工作方法我已經定義了一些變量/ NSMutableArrays（currentQuestionIndex，questions等）。我想使用一個自定義的初始化方法來初始化這些。 當我離開initWithNibName和initWithCoder照原樣編寫一個新的init方法並在其中寫入我的實現時，它不會被調用。

但是，當我操縱代碼，正如我在下面的代碼片段中顯示的那樣，它工作正常。

我想知道在使用Storyboard創建對象時如何使用自定義的init方法，因爲我在這裏所做的可能不是一個好習慣。當我嘗試使用initWithCoder初始化時，它不起作用。但從我記得的，我們使用initWithCoder初始化從Storyboard，對吧？ storyboard中的按鈕/標籤位於FirstViewController中。

這是我FirstViewController.h文件

#import <UIKit/UIKit.h> 

@interface FirstViewController : UIViewController 
{ 
    int currentQuestionIndex; 
    // The model objects 
    NSMutableArray *questions; 
    NSMutableArray *answers; 

    //The view objects 
    IBOutlet UILabel *questionField; 
    IBOutlet UILabel *answerField; 
} 

@property (strong, nonatomic) UIWindow *window; 

- (IBAction)showQuestion:(id)sender; 
- (IBAction)showAnswer:(id)sender; 

@end 

和

這是我FirstViewController.m文件

#import "FirstViewController.h" 

@interface FirstViewController() 

@end 

@implementation FirstViewController 

- (id)init { 
    // Call the init method implemented by the superclass 
    self = [super init]; 
    if(self) { 
     currentQuestionIndex = -1; 
     // Create two arrays and make the pointers point to them 
     questions = [[NSMutableArray alloc] init]; 
     answers = [[NSMutableArray alloc] init]; 
     // Add questions and answers to the arrays 
     [questions addObject:@"What is 7 + 7?"]; 
     [answers addObject:@"14"]; 
     [questions addObject:@"What is the capital of Vermont?"]; 
     [answers addObject:@"Montpelier"]; 
     [questions addObject:@"From what is cognac made?"]; 
     [answers addObject:@"Grapes"]; 
    } 
    // Return the address of the new object 
    return self; 
} 

-(IBAction)showQuestion:(id)sender 
{ 
    currentQuestionIndex++; 
    if(currentQuestionIndex == [questions count]) 
     currentQuestionIndex = 0; 
    NSLog(@"%d",[questions count]); 
    NSString *question = [questions objectAtIndex:currentQuestionIndex]; 
    NSLog(@"dislaying question at index %d : %@" ,currentQuestionIndex,question); 

    [questionField setText:question]; 

    [answerField setText:@"???"]; 
} 

-(IBAction)showAnswer:(id)sender 
{ 
    NSString *answer = [answers objectAtIndex:currentQuestionIndex]; 
    [answerField setText:answer]; 
} 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

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

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end 

Answer 1

我是個讓所有我日誌values..when .. .try

-(id)initWithCoder:(NSCoder *)aDecoder{ 

    if(self = [super initWithCoder:aDecoder]) { 

     currentQuestionIndex = 15; 
     NSLog(@"%d", currentQuestionIndex); 
     // Create two arrays and make the pointers point to them 
     questions = [[NSMutableArray alloc] init]; 
     answers = [[NSMutableArray alloc] init]; 
     // Add questions and answers to the arrays 
     [questions addObject:@"What is 7 + 7?"]; 
     [answers addObject:@"14"]; 
     [questions addObject:@"What is the capital of Vermont?"]; 
     [answers addObject:@"Montpelier"]; 
     [questions addObject:@"From what is cognac made?"]; 
     [answers addObject:@"Grapes"]; 
     NSLog(@"Questions = %@", questions); 
     NSLog(@"Answers = %@", answers); 
    } 
    return self; 
} 

Answer 2

你可以使用- (void)awakeFromNib方法在你的UIViewController