Question

我有#define预处理器来定义IPAddress。我想从我的应用程序更改IPAddress，以便我可以与另一个IPAddress进行交互。我怎样才能实现这个目标

#define validateServerRequestURL @"http://192.168.1.85/"

Answer 1

无法更改宏，但您可以通过将宏存储在NSString中来处理它，然后您可以修改该字符串，即IPAddress

Answer 2

我解决了它

public class ScrollerCustomDuration extends Scroller {

private double mScrollFactor = 1;

public ScrollerCustomDuration(Context context) {
    super(context);
}

public ScrollerCustomDuration(Context context, Interpolator interpolator) {
    super(context, interpolator);
}

@SuppressLint("NewApi")
public ScrollerCustomDuration(Context context, Interpolator interpolator, boolean flywheel) {
    super(context, interpolator, flywheel);
}

/**
 * Set the factor by which the duration will change
 */
public void setScrollDurationFactor(double scrollFactor) {
    mScrollFactor = scrollFactor;
}

@Override
public void startScroll(int startX, int startY, int dx, int dy, int duration) {
    Log.e("##### FIX flash issue",""+startX);
    Log.e("##### FIX flash issue",""+startY);
    Log.e("##### FIX flash issue",""+dx);
    Log.e("##### FIX flash issue",""+dy);
    Log.e("##### FIX flash issue",""+duration);

    super.startScroll(startX, startY, dx, dy, (int) (duration * mScrollFactor));
}

}

其中IPAddress和PortNumber是要保存在用户默认值中的其他宏

Answer 3

只需提及字符串旁边的宏名称即可加入宏。

E.g。

#define IPAddress @"http://www.apple.com"
#define validateServerRequestURL @"http://192.168.1.85/"IPAddress

在运行时validateServerRequestURL将是串联字符串http://192.168.1.85/http://www.apple.com

如何附加预处理器中使用的字符串

3 个答案: