Xcode 帮助？ - " 'didRotateFromInterfaceOrientation' 未声明 " + " 预期 ';'在'：'标记之前“

Question

我正在尝试在 Xcode 中创建一个应用程序，当手机从一个方向旋转到另一个方向时，它将切换到新视图。

这里是“switchviewcontroller.h”文件代码：

#import <UIKit/UIKit.h>

@interface SwitchViewController : UIViewController {

}

-(IBAction)switchview:(id)sender;

@end

---

这里是“switchviewcontroller.m”文件代码：

---

#import "SwitchViewController.h"
#import "secondview.h"

@implementation SwitchViewController

-(IBAction)switchview:(id)sender

// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return YES;
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    if((fromInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) ||
       (fromInterfaceOrientation == UIInterfaceOrientationLandscapeRight))
    {    
        [[secondview alloc] initWithNibName:@"secondview" bundle:[NSBundle mainBundle]];
    }

}

我得到了问题中显示的 2 个错误，所以它不起作用。

Answer 1

您缺少 -(IBAction)switchview:(id)sender 的实现块 - 将其设为 -(IBAction)switchview:(id)sender {} 并重试。