我想在viewController有任何ChildViewController时做点什么。
我使用下面的代码添加子viewController:
MultPeople=[]
while condition:
Person=People()
# Here you somehow get the new cX and cY values
Person.x=cX
Person.y=cY
MultPeople.append(Person)
for index,man in enumerate(MultPeople):
print (index,man.x,man.y)
xplot=man.x
yplot=man.y
cv2.circle(frame1, (xplot, yplot), 2, [50, 20, 255], 3)
现在如何检查ParentVC是否有ChildVC?
答案 0 :(得分:3)
你可以这样做
for (UIViewController *child in parentVC.childViewControllers) {
if ([child isKindOfClass:[childVC class]) {
//your ChildVC here
}
}
希望这个帮助