我如何检查一个项目是否存在以及它是否在 NSMutableArray 中替换它我只是无法弄清楚到目前为止我所拥有的只是:
int i = [arrayOne indexOfObject:@"object to replace"];
NSLog(@"%@", i);
[arrayOne replaceObjectAtIndex:i withObject:@"replace"];
但我不断收到错误:有人可以帮助我吗?
我的数组是:
@[ "13L6-A67-1", "13NAPUSD-A1", "13NASUWO-X1", "13NASUWO-X1", "13ASECON-D1", "13ASECON-D1", "13ASECON-D1", "13ASECON-D1", "13ASMATH-C1", "13ASMATH-C1", "13ASMATH-C1", "13ASMATH-C1", "13ASPHYS-B1", "13ASPHYS-B1", "13ASPHYS-B1", "13ASPHYS-B1", "13B3ITCE-F1", "13B3ITCE-F1", "13B3ITCE-F1", "13B3ITCE-F1" ]