objective-c - 访问 NSMutableArray 组件的特定位

Question

这里是菜鸟问题。

我有一个 NSMutableArray 定义为

lanes = [[NSMutableArray arrayWithCapacity:3] retain];

NSMutableArray 的三个组件是:

<Lane: 0x5544dc0; frame = (201 0; 66 460); alpha = 0.5; opaque = NO; autoresize = RM+BM; tag = 3; layer = <CALayer: 0x5544e30> >
<Lane: 0x55450c0; frame = (53 0; 66 460); alpha = 0.5; opaque = NO; autoresize = RM+BM; tag = 1; layer = <CALayer: 0x5545100>>
<Lane: 0x5546cb0; frame = (127 0; 66 460); alpha = 0.5; opaque = NO; autoresize = RM+BM; tag = 2; layer = <CALayer: 0x5546a10>>

如何只从数组中取出 0x5544dc0、0x55450c0 和 0x5546cb0 位并将它们分配给三个不同的变量供以后使用？

谢谢!

Answer 1

id object = [myArray objectAtIndex:i];