#define SAFE_AREA_INSETS_TOP safeAreaInsets().top
#define SAFE_AREA_INSETS_BOTTOM safeAreaInsets().bottom
UIEdgeInsets safeAreaInsets(void) {
UIEdgeInsets safeAreaInsets = UIEdgeInsetsZero;
if (@available(iOS 11.0, *)) {
safeAreaInsets = [[[[UIApplication sharedApplication] delegate]window]safeAreaInsets];
}
return safeAreaInsets;
}
打印查看：
NSLog(@"%f----%f----%f----%f",SAFE_AREA_INSETS_TOP,safeAreaInsets().top,SAFE_AREA_INSETS_BOTTOM,safeAreaInsets().bottom);