UIScrollView：在scrollViewDidEndZooming中重新创建内容视图

发布于 2024-09-28 09:58:32 字数 611 浏览 6 评论 0原文

我想问一下，在 scrollViewDidEndZooming 方法中重新创建内容视图是否正确？这有什么潜在的问题吗？我使用以下代码：

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {
   [self.contentView removeFromSuperview];

   self.contentView = [[ContentView alloc] init ...];
   ...

   [scrollView addSubview:self.contentView];
}

并且在模拟器中一切正常，但是当我在设备上运行此示例时，有时当我用捏合手势缩放时，我将 scale 值设置为 1.0，这非常奇怪，因为实际上应将其设置为不同于 1.0 的缩放比例。另外，有人可以建议我应该在 removeFromSubview 调用后添加 self.contentView = nil 吗？

注意：我使用 SDK 3.1.2

提前谢谢您

原文

I would like to ask, is it correct to recreate content view in scrollViewDidEndZooming method? Is there any potential problems with this? I use the following code:

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {
   [self.contentView removeFromSuperview];

   self.contentView = [[ContentView alloc] init ...];
   ...

   [scrollView addSubview:self.contentView];
}

and with the simulator everything works correctly, but when I run this example on device sometimes when I zoom with pinch gesture I have a scale value set to 1.0 that is very strange because actually it should be set to zoom scale that differ from 1.0. Also, could somebody advice should I add self.contentView = nil after removeFromSubview call?

NOTE: I use SDK 3.1.2

Thank you in advance

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