Question

我正在编写有关创建应用的教程。我跟着一起，把所有内容都写成了教程。然而，当我点击构建时，我得到了一些错误。下面是我在实现文件中的方法代码片段。我收到一个错误....（scrollTheView'未申报）...我还有另一个错误堆叠（预期';'之前'：'令牌）.....

在这个方法下面，我将包含我的整个Header文件，我已经声明了方法“scrollTheView”，所以我不明白我哪里出错了。该教程使用的是SDK iPhone OS 2.2.1，但我使用的是SDK iphone 4.3，这可能是导致此问题的真正原因吗？我编辑了帖子以包含整个实现文件。在代码结束时，我还会在输入结束时收到错误的“预期声明或声明”，并在实施环境中收到另一个“@end”缺失声明，感谢所有观看并试图帮助我的人。谢谢scott帮我解决了那个缺失的括号..现在我有一个通知，即使它编译也会弹出..“UIKeyboardBoundsUserInfoKey已被弃用通知”任何人都知道这意味着什么？因为它编译，我应该担心吗？它出现在'keyboardVillShow'方法下的“NSValue * aValue .....”行中

 #import "ReturnToMeViewController.h"  
 #import "ReturnToMeAppDelegate.h"

@implementation ReturnToMeViewController

@synthesize textField;  
@synthesize label;  
@synthesize callNumber;  

-(void)viewDidLoad {  
    textField.clearButtonMode =
    UITextFieldViewModeWhileEditing;  
    [super viewDidLoad];  
}




-(void) viewWillAppear:(BOOL)animated {  
    [[NSNotificationCenter defaultCenter] addObserver:self
                    selector:@selector(keyboardWillShow:)  
                        name:UIKeyboardWillShowNotification
                        object:self.view.window];  
    [super viewWillAppear:animated];  
}

-(void) viewWillDisappear:(BOOL)animated {  

    [[NSNotificationCenter defaultCenter] removeObserver:self
            name:UIKeyboardWillShowNotification object:nil];  
    [super viewWillDisappear:animated];  
}

-(void)keyboardWillShow: (NSNotification *)notif {

    NSDictionary* info = [notif userInfo];  

    NSValue* aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];  
    CGSize keyboardSize = [aValue CGRectValue] .size;  
    float bottomPoint = (textField.frame.origin.y+textField.frame.size.height+10);  
    scrollAmount = keyboardSize.height - (self.view.frame.size.height- bottomPoint);  

    if (scrollAmount >0) {
        moveViewUp =YES;   
        [self scrollTheView:YES]; 
    }
    else {
        moveViewUp =NO;  

    }



-**(void) scrollTheView:(BOOL) movedUp {**

        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.3];
        CGRect rect = self.view.frame;
        if (movedUp) {
            rect.origin.y -= scrollAmount;
        }
        else {
            rect.origin.y += scrollAmount;
        }
        self.view.frame = rect;
        [UIView commitAnimations];
    }

-(void)touchesBegan: (NSSet *) touches withEvent: (UIEvent *)event {  
        if ( textField.editing) {  
            [textField resignFirstResponder];  
            [self updateCallNumber];  
            if (moveViewUp) [self scrollTheView:NO];  
        }
        [super touchesBegan:touches withEvent:event];  
    }



-(void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

-(void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


-(void)dealloc {  
    [textField release];  
    [label release];   
    [callNumber release]; 
    [super dealloc];  
}

    -(BOOL)textFieldShouldReturn: (UITextField *)theTextField {  

        [theTextField resignFirstResponder];   
        if (moveViewUp) [self scrollTheView:NO];  
        [self updateCallNumber]; 

        return YES;  
    }

-(void)updateCallNumber {    
        self.callNumber = textField.text;  
        label.text = self.callNumber;  
    }  

@end


###ReturnToMeViewController.m

    #import <  UIKit/UIKit.h >  

    @interface ReturnToMeViewController : UIViewController
        < UITextFieldDelegate > {  
        IBOutlet UITextField *textField;  
        IBOutlet UILabel *label;  
        BOOL    moveViewUp;  
        CGFloat  scrollAmount;  
        NSString  *callNumber;  

    }  

    @property (nonatomic, retain) UITextField *textField;  
    @property (nonatomic, retain) UILabel *label;  
    @property (nonatomic, retain) NSString  *callNumber;  

    - (void)scrollTheView:(BOOL) movedUp;  
    - (void)updateCallNumber;  

    **@end**

Answer 1

听起来你错过了一个紧密的括号“}”或分号“;”在您的scrollTheView函数之前的某个地方。

Answer 2

在声明scrollTheView之前可能会出现错误，这意味着它无法检测scrollTheView。在这里查看或发布更多代码。

Answer 3

您在keyboardWillShow:(NSNotification *)notif方法的末尾错过了一个结束括号。

if (scrollAmount >0) {
    moveViewUp =YES;
    [self scrollTheView:YES];
}
else {
    moveViewUp =NO;
} // This is where the missing bracket should be
}

需要有两个右括号 - 一个用于if语句，一个用于方法 - 但只有一个。

错误“scrollTheView”未解决的问题

3 个答案: