来自另一个类的Iphone调用方法
我有一个多个XIB文件项目。我有一个switchViewController类,用于处理内容视图的切换。我想从其他类调用这个类中的方法。我有以下代码:来自另一个类的Iphone调用方法,iphone,objective-c,Iphone,Objective C,我有一个多个XIB文件项目。我有一个switchViewController类,用于处理内容视图的切换。我想从其他类调用这个类中的方法。我有以下代码: //SwitchViewController.h Code: #import <UIKit/UIKit.h> @class MainMenuViewController; @class GlassRepairsViewController; @interface SwitchViewController : UIViewCont
//SwitchViewController.h
Code:
#import <UIKit/UIKit.h>
@class MainMenuViewController;
@class GlassRepairsViewController;
@interface SwitchViewController : UIViewController {
MainMenuViewController *mainMenuViewController;
GlassRepairsViewController *glassRepairsViewController;
}
@property (retain,nonatomic) MainMenuViewController *mainMenuViewController;
@property (retain,nonatomic) GlassRepairsViewController *glassRepairsViewController;
-(IBAction)goToGlassRepairs;
-(IBAction)goToMainMenu;
@end
//switch view controller m file
Code:
#import "SwitchViewController.h"
#import "MainMenuViewController.h"
#import "GlassRepairsViewController.h"
@implementation SwitchViewController
@synthesize MainMenuViewController;
@synthesize GlassRepairsViewController;
- (void)viewDidLoad {
MainMenuViewController *mainMenuController = [[MainMenuViewController alloc] initWithNibName:@"MainMenuView" bundle:nil];
self.mainMenuViewController = mainMenuController;
[self.view insertSubview:mainMenuController.view atIndex:0];
[mainMenuController release];
[super viewDidLoad];
}
//These IBActions are linked to buttons on the view that is linked to this class (swtichViewController) This works perfectly for showing different nibs
-(IBAction) goToGlassRepairs
{
if(self.glassRepairsViewController.view.superview == nil)
{
if(self.glassRepairsViewController == nil)
{
GlassRepairsViewController *glassRepairsController = [[GlassRepairsViewController alloc] initWithNibName:@"GlassRepairsView" bundle:nil];
self.GlassRepairsViewController =glassRepairsController;
[glassRepairsController release];
}
[mainMenuViewController.view removeFromSuperview];
[self.view insertSubview:glassRepairsViewController.view atIndex:0];
}
}
-(IBAction) goToMainMenu
{
if(self.mainMenuViewController.view.superview == nil)
{
if(self.mainMenuViewController == nil)
{
MainMenuViewController *mainMenuController = [[ MainMenuViewController alloc] initWithNibName:@"MainMenuView" bundle:nil];
self.mainMenuViewController = mainMenuController;
[mainMenuController release];
}
[glassRepairsViewController.view removeFromSuperview];
[self.view insertSubview:mainMenuViewController.view atIndex:0];
}
}
//MainMenuViewController.h
Code:
#import <UIKit/UIKit.h>
@class SwitchViewController;
@interface MainMenuViewController : UIViewController {
}
-(IBAction)goToGlass;
@end
//MainMenuViewController.m
Code:
#import "MainMenuViewController.h"
#import "SwitchViewController.h"
@implementation MainMenuViewController
-(IBAction)goToGlass
{
**//This is where I want to call the goToGlassRepairs method that is inside SwitchViewController's class...**
}
它编译时没有警告,但出现以下错误:
2010-03-09 15:51:28.350 Alfa2Go[29535:207]***-[GoAppDelegate goToGlassRepairs]:发送到实例0x3b26620的无法识别的选择器
2010-03-09 15:51:28.362 Go[29535:207]*由于未捕获的异常“NSInvalidArgumentException”而终止应用程序,原因:'*
-[GoAppDelegate goToGlassRepairs]:发送到实例0x3b26620'的无法识别的选择器好吧,我猜
[[UIApplication sharedApplication]委托]
没有返回SwitchViewController
,而是返回GoAppDelegate
。您需要先找到您的SwitchViewController
,然后才能对其调用方法。您可以在MainMenu类中创建属性(例如,id switchController)。
由于switch view controller处理MainMenu的分配,它还可以将此属性设置为自己,因此MainMenu类将有一种访问控制器的方法…最终实现了这一点:
我所做的是在app委托中添加了一个函数,该函数调用switchview控制器中的display函数。然后我将应用程序代理导入主菜单,并创建了一个调用应用程序代理函数的函数。ok,即使我尝试:switchViewController*s=[[switchViewController alloc]init];[s goToGlassRepair];它给我警告说s可能不会响应goToGlassRepairCheck拼写检查?您的第一个switchViewController没有大写,其他的都是。另外,你发布的代码上写着“goToGlassRepairs”,但你的代码上写着“goToGlassRepair”。当然,要确保包含头文件。
`SwitchViewController *s = (SwitchViewController *)[[UIApplication sharedApplication] delegate];
[s goToGlassRepairs];`