移除子视图的使用方法
方法1
for (UIView *subview in self.containerView.subviews) {
[subview removeFromSuperview];
}
方法2
for (NSInteger i = view.subviews.count; i > 0; i--)
{
UIView *subView = [view.subviews objectAtIndex:(i - 1)];
[subView removeFromSuperview];
}
方法3
[self.containerView.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
[obj removeFromSuperview];
}];
方法4
[self.containerView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
方法5
[self.containerView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
方法6
[self.containerView.subviews performSelector:@selector(removeAllObjects)];