ios8上的地图旋转速度非常慢 [英] Map rotation horribly slow on ios8

问题描述

我在旧项目的VC中获得了以下代码（没有故事板，纯代码）：

I got the following code in a VC in an old project (no storyboard, pure code) :

- (void)viewDidLoad {
    [super viewDidLoad];
    self.mapView = [[MKMapView alloc] initWithFrame:CGRectInset(self.view.frame, 10, 10) ];
    [self.view addSubview:self.mapView];
    self.view.backgroundColor = [UIColor redColor];
    self.mapView.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    self.view.translatesAutoresizingMaskIntoConstraints = NO; // <--- this line
}

如果我评论最后一行， ios8下从纵向到横向的旋转或其他方式约为 3秒 !!此外，偶尔会在随机时间无法分配渲染缓冲区存储！错误出现。

If I comment the last line, a rotation from portrait to landscape or the other way is about 3 seconds under ios8 !! Also, occasionally at random times Unable to allocate render buffer storage! errors appear.

如果我不评论它，它几乎是瞬间的（的0.7秒）。
似乎它只与mapviews相关，其他视图/ VC旋转得很好。

If I don't comment it, it's almost instantaneous (0.7seconds). It seems it is only related to mapviews, the other views/VCs rotate just fine.

在ios7下，无论如何在该行评论时旋转速度很快或不。

Under ios7 the rotation is fast in any case with that line commented or not.

为什么？为什么只有mapview受到影响？

Why ? And why is only the mapview affected ?

编辑：很明显autoresizingmask是错误的。如果在 viewDidLoad 中我将其值设置为none并手动更改willRotate中的帧，则它的工作速度很快。

It seems clearly the autoresizingmask is wrong. If in viewDidLoad I set its value to none and manually change the frame in willRotate, it works fast.

推荐答案

当应用程序从后台返回时我遇到了同样的问题。它冻结了几秒钟，然后再次起作用。我使用了没有Autolayout的.xib文件。当我更新.xib文件并添加了Autolayout选项时，问题就消失了。我想出了这个想法，因为你写道，自动化是解决方案中的问题。也许这对其他人也有帮助...

I had the same problem when the application came back from the background. It froze a few seconds and then it worked again. I used a .xib file without Autolayout. When I updated the .xib file and added the Autolayout option the problem was gone. I came up with this idea because you wrote that autoresizing was the problem in your solution. Maybe this will help others too...

欢呼
Paul

cheers Paul

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