Question

我还在学习中。我想能够点击一个对象数组，这个对象以可纹理的方式显示。这是我有多远：

我从第0位的对象开始。当点击一个按钮时，标签会显示一个。我再次点击按钮，标签上写着两个，然后再点击它就说三个。有人可以帮忙吗？感谢

- ＆GT;编辑问题：

我知道我需要计算++，但我不确定如何正确使用它。如果我现在把它放在代码中的位置，标签只会说两个。是的，它应该是因为它增加了一个，所以它的索引处的对象是＆＃34;两个＆＃34;。它只显示＆＃34;两个＆＃34;在标签上。那么有没有办法让它与if语句一起使用？

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

试试这个：

@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

单击一个数组

1 个答案: