如何更改NSArray中的元素? [英] How do you change the elements within an NSArray?

问题描述

对于在Objective-C中如何处理数组，我有些困惑. 如果我有一个数组，例如

I am a bit confused as to how arrays are handled in Objective-C. If I have an array such as

NSarray *myArray = [[NSArray alloc]
                                  initWithObjects:@"N", @"N", @"N", @"N", @"N",
                                  nil];

如何将首次出现的内容更改为"Y"?

how do I change the first occurrence to "Y"?

推荐答案

您需要一个NSMutableArray ..

You need an NSMutableArray ..

NSMutableArray *myArray = [[NSMutableArray alloc]
                                  initWithObjects:@"N", @"N", @"N", @"N", @"N",
                                  nil];

然后

[myArray replaceObjectAtIndex:0 withObject:@"Y"];

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