removeObjectsInArray隱藏細節 數組排序

NSMutableArray *a = [[NSMutableArray alloc] 數組 initWithObjects:@"1",@"3",@"5",@"1", nil];spa NSMutableArray *b = [[NSMutableArray alloc] 排序 initWithObjects:@"1", nil];rem [a removeObjectsInArray:b];it

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