我有一个基于窗口的 TabBarController 应用程序，我正在尝试从其中一个选项卡 (FirstViewController) 中呈现 ModalView。该应用程序构建得很好并且选项卡工作，但是在单击“打开模式视图”按钮时，它崩溃并给我：
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController openModalView]: unrecognized selector sent to instance 0x5d1e930'
更新：我发现问题不在于呈现模式视图，而是任何 IBAction 调用都会发生崩溃。是什么原因造成的？
FirstViewController.h：
#import <UIKit/UIKit.h>
#import "ModalViewController.h"
@interface FirstViewController : UIViewController <ModalViewDelegate> {}
@end
FirstViewController.m:
#import "FirstViewController.h"
@implementation FirstViewController
- (IBAction) openModalView {
ModalViewController *modalView=[[ModalViewController alloc] init];
modalView.modalDelegate=self;
[self presentModalViewController:modalView animated:YES];
[modalView release];
}
#pragma mark -
#pragma mark ModalViewDelegate
- (void) didHitCancel {
[self dismissModalViewControllerAnimated:YES];
}
#pragma mark -
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
[super viewDidUnload];
}
- (void)dealloc {
[super dealloc];
}
@end
模态视图控制器.h：
#import <UIKit/UIKit.h>
@protocol ModalViewDelegate <NSObject>
- (void)didHitCancel;
@end
@interface ModalViewController : UIViewController {
id modalDelegate;
}
@property (nonatomic, assign) id<ModalViewDelegate> modalDelegate;
- (IBAction) cancel;
@end
模态视图控制器.m：
#import "ModalViewController.h"
@implementation ModalViewController
@synthesize modalDelegate;
- (IBAction) cancel {
[self.modalDelegate didHitCancel];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
[super viewDidUnload];
}
- (void)dealloc {
[super dealloc];
}
@end
我知道这是很多代码，但我想确保有人能找到问题所在。
提前致谢！