切换视图在iphone

问题描述

在我做一个客户端服务器程序，其中我想从一个视图切换到另一个，但我收到一个错误clientserverprogram view.mplz help

 clientserverprogram view.h
 
 #import< UIKit / UIKit.h> 
 
 @class secondview; 
 
 @interface clientserverprogramViewController：UIViewController {
 
 IBOutlet UITextField * name; 
 IBOutlet UITextView * filepath; 
 IBOutlet UIButton * print; 
 IBOutlet UIButton * settings; 
 IBOutlet UIButton * cancel; 
 IBOutlet UILabel * display; 
 IBOutlet secondview * secondview; 
} 
 
  - （IBAction）print; 
  - （IBAction）设置; 
  - （IBAction）cancel; 
 
 @property（nonatomic，retain）IBOutlet UITextField * name; 
 @property（nonatomic，retain）IBOutlet UITextView * filepath; 
 
 @property（nonatomic，retain）IBOutlet UILabel * display; 
 @end 
 
 
 
 
clientserverprogram view.m
 
 
 #importclientserverprogramViewController.h 
 #importsecondview.h
 
 
 @implementation clientserverprogramViewController 
 
 @synthesize名称，文件路径，显示; 
 
  - （IBAction）print {
 
 NSString * str = name.text; 
 
 
 [display setText：str]; 
 
} 
 
  - （IBAction）设置{
 
 
 [self presentModalViewController：secondview animated：YES]; 
 
错误：'secondview'之前的预期表达式
 
 
} 
 
 
  - （IBAction）cancel {
 
 
 exit（0）; 
 
} 
 
 
  - （void）dealloc {
 [super dealloc]; 
} 
 
 @end 
 
 
secondview.h
 
 
 #import< UIKit / UIKit.h> 
 
 
 @interface secondview：UIViewController {
 
 IBOutlet UIView * view; 
 
 IBOutlet UIButton * back; 
 
} 
 
  - （IBAction）back; 
 
 
 
 @end 
 
 
 
secondview.m
 
 
 #importsecondview.h
 
 
 @implementation secondview 
 
 
 
 
  - （IBAction）back {
 
 [self.parentViewController dismissModalViewControllerAnimated：YES]; 
} 
 
 
  - （void）dealloc {
 [super dealloc]; 
} 
 
 
 @end 
  

方案

  [self presentModalViewController：secondview animated：YES]; 
 
错误：'secondview'之前的预期表达式
  

代码行负责呈现模态ViewController。在你的情况下，你只有一个看法。所以你可以为第二个视图创建一个控制器：

  SecondViewController * secondController = [[SecondViewController alloc] initWithNibName：@ secondViewbundle：[NSBundle mainBundle]]; 
 [self presentModalViewController：secondController animated：YES]; 
  

或者您可以使用插座从nib文件加载第二个视图，您可以将其作为子视图添加到当前视图控制器视图：

  [self.view addSubView：secondview]; 
  

更新

你的代码SecondView是你的控制器不是视图，但你试图呈现一个没有初始化的控制器。我还注意到，你有一个插座，你的视图在SecondView，当你创建一个新的UIViewController子类，你可以检查创建一个.xib文件的选项。

希望有帮助，

i m making a client server program in which i want to switch from one view to another but i am getting an error in "clientserverprogram view.m" plz help

"clientserverprogram view.h"

#import <UIKit/UIKit.h>

@class secondview;

@interface clientserverprogramViewController : UIViewController {

    IBOutlet UITextField *name;
    IBOutlet UITextView *filepath;
    IBOutlet UIButton *print;
    IBOutlet UIButton *settings;
    IBOutlet UIButton *cancel;
    IBOutlet UILabel *display;
    IBOutlet secondview *secondview;
}

-(IBAction) print;
-(IBAction) settings;
-(IBAction) cancel;

@property (nonatomic , retain) IBOutlet UITextField *name;
@property (nonatomic , retain) IBOutlet UITextView *filepath;

@property (nonatomic , retain) IBOutlet UILabel *display;
@end




"clientserverprogram view.m"


#import "clientserverprogramViewController.h"
#import "secondview.h"


@implementation clientserverprogramViewController

@synthesize  name ,filepath,display ;

-(IBAction) print {

    NSString *str = name.text;


    [display setText : str];

}

-(IBAction) settings {


    [self presentModalViewController: secondview animated: YES ];

"" error: expected expression before 'secondview'""


}


-(IBAction) cancel {


    exit(0);

}


- (void)dealloc {
    [super dealloc];
}

@end


"secondview.h"


#import <UIKit/UIKit.h>


@interface secondview : UIViewController {

    IBOutlet UIView *view;

    IBOutlet UIButton *back;

}

-(IBAction) back;



@end



""secondview.m""


#import "secondview.h"


@implementation secondview




-(IBAction) back {

    [self.parentViewController dismissModalViewControllerAnimated: YES];
}


- (void)dealloc {
    [super dealloc];
}


@end

解决方案

[self presentModalViewController: secondview animated: YES ];

"" error: expected expression before 'secondview'""

This line of code is responsible to present modal ViewController. In your case you only had a view. So either you create a controller for the second view like that:

SecondViewController *secondController=[[SecondViewController  alloc] initWithNibName:@"secondView" bundle:[NSBundle mainBundle]];
 [self presentModalViewController:secondController animated: YES ];

or you can load you second view from nib file using outlet and you can add it as subview to your current view controller view:

[self.view addSubView:secondview];

Update

As I can see on your code SecondView is your controller not the view, but you are try to present a controller that is not initialized. I also noticed that you have an outlet for your view on SecondView, when you create a new sub class of UIViewController you can check the option that creates a .xib file as well.

Hope that helps,

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