點擊數組

Question

我還在學習過程中。我希望能夠點擊一個對象數組，並且該對象以可文本顯示。這是我得到多遠：

我開始與位置0的對象。當一個按鈕被點擊標籤說一個。我再次點擊按鈕，標籤上寫着兩個，然後再次點擊三個。有人可以幫忙嗎？ 感謝

- >編輯問：

我知道我需要算++莫名其妙，但我不知道如何正確使用它。如果我現在把它放在代碼的哪個位置，那麼標籤只會說兩個。是的，它應該是因爲它增加了一個，所以它的索引中的對象是「兩個」。它只在標籤中顯示「two」。那麼是否有一種方法可以使if語句工作？

NSString *word = {@"one,two,three"}; 
NSArray *anArray = [word componentsSeparatedByString:@","]; 
int count = anArray.count; 
count = 0; 
count++; 

if (count == 0){ 
_labelText.text = [NSString stringWithFormat:@"%@" , [anArray objectAtIndex:0]]; 
} 

else if(count == 1){ 
_labelText.text = [NSString stringWithFormat:@"%@", [anArray objectAtIndex:1]]; 
} 

else if (count ==2){ 
_labelText.text = [NSString stringWithFormat:@"%@", [anArray objectAtIndex:2]]; 
} 

Answer 1

試試這個：

@interface ViewController() 

@property (nonatomic, weak) IBOutlet UILabel *labelText; 
@property (nonatomic, strong) NSArray *words; 
@property (nonatomic, readwrite) NSInteger counter; 

@end 

@implementation ViewController 

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

    self.words = @[@"one", @"two", @"three"]; 
    self.counter = 0; 

    [self updateUI]; 
} 

- (IBAction)nextButton:(id)sender { 
    self.counter = (self.counter + 1) % self.words.count; 
    [self updateUI]; 
} 

- (void)updateUI { 
    self.labelText.text = self.words[self.counter]; 
} 

@end