在仅限肖像应用程序中以横向模式呈现UIViewController-Java 学习之路

我的应用程序只是一个肖像 . 我需要在Landscape模式下呈现一个UIViewController（原因是我使用Core-Plot sdk在该viewcontroller上绘制图形，因此它需要处于横向模式） .

我尝试了以下方法，它工作正常 . 但问题是，当我解除横向视图控制器时，app无法强制进入纵向模式 .

http://www.sebastianborggrewe.de/only-make-one-single-view-controller-rotate/

http://b2cloud.com.au/tutorial/forcing-uiviewcontroller-orientation/

如何在关闭横向视图控制器后强制应用程序变为 portrait only 模式？

这就是我如何呈现景观视图控制器并解除它 .

LineChartViewController *obj = [[LineChartViewController alloc]initWithNibName:@"LineChartViewController" bundle:nil];

 [self.navigationController presentViewController:obj animated:YES completion:nil];  


- (IBAction)btnDonePressed:(id)sender{
    [self dismissViewControllerAnimated:NO completion:nil];
}

LineChartViewController的XIB处于横向模式 .

In simple words, My app is portrait only, and I wanted to show CorePlot hostView in landscape mode.

4 回答

在您的项目中写下此类别

#import "UINavigationController+ZCNavigationController.h"

@implementation UINavigationController (ZCNavigationController)

-(BOOL)shouldAutorotate
{
    return [[self.viewControllers lastObject] shouldAutorotate];
}

-(NSUInteger)supportedInterfaceOrientations
{
    return [[self.viewControllers lastObject] supportedInterfaceOrientations];
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [[self.viewControllers lastObject] preferredInterfaceOrientationForPresentation];
}
@end

在您需要Landscape的viewcontroller中

- (BOOL)shouldAutorotate {
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

回复于 2024-05-06T13:34:23+08:00

实际上我可以通过旋转CorePlot hostView来解决问题 . 对于所描述的问题，解决方案并不完美，但我想把解决方案放在这里，因为它解决了我的问题

self.hostView = [(CPTGraphHostingView *) [CPTGraphHostingView alloc] initWithFrame:self.viewGraphBack.bounds];
self.hostView.allowPinchScaling = YES;
[self.viewGraphBack addSubview:self.hostView];

CGAffineTransform transform =
CGAffineTransformMakeRotation(DegreesToRadians(90));

viewGraphBack.transform = transform;

viewGraphBack.frame = CGRectMake(-285, 0, 568, 320);

[self.view addSubview:viewGraphBack];

回复于 2024-05-06T13:34:23+08:00

这种解决方法适用于我（临时推送假模型视图控制器），在引入新方向的其他视图控制器被调用后被调用：

- (void)doAWorkaroudnOnUnwantedRotation {
  // check if is workaround nesesery:
  if (UIInterfaceOrientationIsLandscape([UIDevice currentDevice].orientation)) {
    double delayInSeconds = 0.7;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
      UIViewController *fake = [[[UIViewController alloc] init] autorelease];
      UIViewController *rootController = [UIApplication sharedApplication].keyWindow.rootViewController;
      [rootController presentModalViewController: fake animated: NO];
      [fake dismissModalViewControllerAnimated: NO];
    });
  }
}

回复于 2024-05-06T13:34:23+08:00

2
如果在 UIInterfaceOrientationPortrait 模式和当前viewcontroller中的父视图控件应该在 UIInterfaceOrientationLandscapeLeft 或 UIInterfaceOrientationLandscapeRight 中，那么您可以使用设备方向更改委托和 viewdidload 中的一些代码

在ViewDidLoad中
```
NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeLeft];
[[UIDevice currentDevice] setValue:value forKey:@"orientation"];
```
在ViewController中实现 shouldAutorotateToInterfaceOrientation 委托
```
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if (UIInterfaceOrientationIsLandscape(interfaceOrientation)) return YES;
    return NO;
}
```
像这样 . 确保必须从目标设置签入横向模式 .
回复于 2024-05-06T13:34:23+08:00

在仅限肖像应用程序中以横向模式呈现UIViewController

4 回答

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