這個東西的作用就是，不用你把所有NSLog的刪除或註釋，直接修改#if 判斷的值就行了

要放在你的Prefix.pch文件裏面
#if 1 #define NSLog(FORMAT, ...) fprintf(stderr,"[%s:%d行] %s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]); #else #define NSLog(FORMAT, ...) nil #endif



////////////////
#define NEED_OUTPUT_LOG                     0
#if NEED_OUTPUT_LOG

    #define SLog(xx, ...)   NSLog(xx, ##__VA_ARGS__)
    #define SLLog(xx, ...)  NSLog(@"%s(%d): " xx, __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

    #define SLLogRect(rect) \
    SLLog(@"%s x=%f, y=%f, w=%f, h=%f", #rect, rect.origin.x, rect.origin.y, \
    rect.size.width, rect.size.height)

    #define SLLogPoint(pt) \
    SLLog(@"%s x=%f, y=%f", #pt, pt.x, pt.y)

    #define SLLogSize(size) \
    SLLog(@"%s w=%f, h=%f", #size, size.width, size.height)

    #define SLLogColor(_COLOR) \
    SLLog(@"%s h=%f, s=%f, v=%f", #_COLOR, _COLOR.hue, _COLOR.saturation, _COLOR.value)

    #define SLLogSuperViews(_VIEW) \
    { for (UIView* view = _VIEW; view; view = view.superview) { SLLog(@"%@", view); } }

    #define SLLogSubViews(_VIEW) \
    { for (UIView* view in [_VIEW subviews]) { SLLog(@"%@", view); } }

#else

    #define SLog(xx, ...)  ((void)0)
    #define SLLog(xx, ...)  ((void)0)

#endif