訪問目標C嵌套數組元素

Question

我有一個數組初始化

- (void) viewDidLoad { 
    NSArray *myArray = [NSArray arrayWithObjects: 
        [NSArray arrayWithObjects:@"item 1-1", @"item 1-2", nil], 
        [NSArray arrayWithObjects:@"item 2-1", @"item 2-2", nil], 
        [NSArray arrayWithObjects:@"item 3-1", @"item 3-2", nil], 
        nil]; 
} 

- (IBAction) someButtonPressed { 
    NSString *text = // and here I can't figure out how to actually access the value needed 
    [someLabel setText:text]; 
} 

我需要someLabel文本設置爲「項1-2」值，例如。我怎樣才能做到這一點？

Answer 1

[someLabel setText:[[myArray objectAtIndex:0] objectAtIndex:1]; 

您確實需要讓myArray對其他方法可見 - 將它放在類聲明中是最簡單的方法。不要忘記在dealloc中釋放它。