相关疑难解决方法(0)

我创建了一个按钮,并为其添加了一个动作,但是一旦调用它,我就收到了这个错误:

-[NSCFDictionary numberButtonClick:]: unrecognized selector sent to instance
 0x3d03ac0 2010-03-16 22:23:58.811
 Money[8056:207] *** Terminating app
 due to uncaught exception
 'NSInvalidArgumentException', reason:'*** -[NSCFDictionary numberButtonClick:]:  unrecognized selector sent to instance 0x3d03ac0'

这是我的代码:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        UIButton *numberButton = [UIButton buttonWithType:UIButtonTypeCustom];        
        numberButton.frame = CGRectMake(10, 435, 46, 38);
        [numberButton setImage:[UIImage imageNamed:@"one.png"] forState:UIControlStateNormal];
        [numberButton addTarget:self action:@selector(numberButtonClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview: numberButton]; 
    }
return self;
}

-(IBAction)numberButtonClick:(id)sender{
    NSLog(@"---");
}

如何在Xcode中添加异常断点？

int main(int argc, char *argv[]) {

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    int retVal = UIApplicationMain(argc, argv, nil, @"AppController");
    [pool release];
    return retVal;
}

我的项目随机崩溃在下面的代码中,在谷歌搜索,一些建议添加异常断点.我通过点击源代码行添加了断点.编辑断点不允许我改变类型.如何添加Exception Breakpoint以及添加位置？(在AppDelegate？

我面临一个问题,我不明白其中的原因.例外并没有给我一个理解问题的线索.

我想根据myArray中给出的数据在我的界面修改UILabel的内容.但是,作为我在函数"cellForRowAtIndexPath"中指定的行,程序将触发异常.

这个问题的原因是什么？

@property (strong, nonatomic) NSMutableArray *myArray; //

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [myArray addObject:@{@"field1": @"myfield1"}]
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger) section {
    return self.myArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"CellIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    // Configure the cell...
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }

    UILabel *myLabel = (UILabel *)[cell viewWithTag:100]; // myLabel is successfully created …

我收到以下错误消息,我无法理解为什么它发生,因为我没有使用任何UIImageView.有时我得到同样的错误,但它是一个CALayer？!？

值得一提的是,我有2个nib和2个控制器以及这个代码所在的基本控制器.

编辑:

这是我项目的结构

MainViewController及其笔尖 - nib中的HomeViewController

MainViewController-Landscape及其笔尖 - HomeViewController-Landscape in nib

HomeViewControllerBase - no nib - 存在所有出口和项目配置代码的基类. - 以下两个子课程都使用奥特莱斯. - 奥特莱斯与每个主要笔尖中的控件相关联.

HomeViewController - 从HomeViewControllerBase继承

HomeViewController-Landscape - 从HomeViewControllerBase继承

所以发生的事情是,子类正在尝试释放其基类(其中包含所有出口).我这样设计它是为了避免在不同的方向视图控制器中重复代码.

@implementation MainViewController
- (void)orientationChanged:(NSNotification *)notification
{
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;

    if (UIDeviceOrientationIsLandscape(deviceOrientation) && !isShowingLandscapeView)
    {
        [self presentModalViewController:self.landscapeViewController
                                animated:YES];

        isShowingLandscapeView = YES;
    }
    else if (UIDeviceOrientationIsPortrait(deviceOrientation) && isShowingLandscapeView)
    {
        [self dismissModalViewControllerAnimated:YES];
        isShowingLandscapeView = NO;
    }
}

- (id)init
{
    self = [super initWithNibName:@"MainViewController" bundle:nil];

    if (self)
    {
        isShowingLandscapeView = NO;
        self.landscapeViewController …

任何人都知道我为什么会收到此错误？

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CustomRaisedTabViewController cancel:]: unrecognized selector sent to instance 0x4d321e0'

这是它失败的代码.这是我的CustomTabViewController.单击"取消"按钮时发生错误.

-(IBAction)showPostModalViewController {

PostActionModalViewController *addController = [[PostActionModalViewController alloc] 
                                                initWithNibName:@"PostActionModalView" bundle:nil];

// Configure the PostAddViewController. In this case, it reports any
// changes to a custom delegate object.

addController.delegate = self;



// Create the navigation controller and present it modally.

UINavigationController *navigationController = [[UINavigationController alloc]
                                                initWithRootViewController:addController];

[self presentModalViewController:navigationController animated:YES];

UIBarButtonItem *cancelButton =
[[UIBarButtonItem alloc] initWithTitle: @"Cancel"
                                 style: UIBarButtonItemStylePlain
                                target: self
                                action: @selector(cancel:)]; …

我正在创建一个示例应用程序,其中我正在读取数据库并将用户图像和名称显示在tableview中.但我得到以下例外

[UIApplication userListMutableArray]: unrecognized selector sent to instance 0x6816330

以下是我的代码片段

AppDelegate *appDelegate = (AppDelegate*)[UIApplication sharedApplication];

if(sqlite3_open([dbPath UTF8String], &database)==SQLITE_OK)
{
  const char *sql = "select NAME,IMAGE from user";
    sqlite3_stmt *selectstmt;

    if(sqlite3_prepare_v2(database, sql, -1, &selectstmt, NULL)==SQLITE_OK)
    {
        while (sqlite3_step(selectstmt) == SQLITE_ROW) {

            UserData *userData = [[UserData alloc] init];
            userData.userName = [NSString stringWithUTF8String:(char*)sqlite3_column_text(selectstmt, 0)];
            NSData *data = [[NSData alloc] initWithBytes:sqlite3_column_blob(selectstmt, 1) length:sqlite3_column_bytes(selectstmt, 1)];
            if(data == nil)
                NSLog(@"image not found");
            userData.userImage = [UIImage imageWithData:data];


            **[appDelegate.userListMutableArray addObject:userData];**
        }

    }
}
else
{
    sqlite3_close(database);
}

[appDelegate.userListMutableArray …

XCode让我疯狂(再次).人们如何使用它？

-[UIViewController look_for_offer:]: unrecognized selector sent to instance 0x4e34220
2011-04-30 18:38:25.207 myApp[8261:40b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController look_for_offer:]: unrecognized selector sent to instance 0x4e34220'

这就是我做的.我按了一个按钮.我点击了按钮,然后转到检查器中的"连接"选项卡.我从触摸事件拖到代码,它自动创建一个空方法和方法标题.这是方法:

- (IBAction)look_for_offer:(id)sender {

}

现在记住,我甚至没有写过.Interface Builder为我生成了它.然而,当我构建并单击按钮时,我收到"无法识别的选择器"错误消息.

它从错误消息中看起来就像他正在尝试将消息look_for_offer发送到UIViewController.我不知道为什么他会这样做.该方法在我看来,它是UIViewController的子类:

@interface ClientSeekingView : UIViewController {

}

- (IBAction)look_for_offer:(id)sender;

我清楚地将动作拖入了类代码,而不是UIViewController.他为什么要尝试向UIViewController发送消息而不是我的类？

我究竟做错了什么？我如何取悦Xcode？

PS:我清理并重建了几次,没有帮助.

MRB

我在选择通知方法时遇到问题.

在init中我已经定义了这个:

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(stopSyncIndicator:) name:IOS_STOP_SYNC_INDICATOR object:nil];

不过,在头文件和相同的实现中都定义了该方法:

-(void)stopSyncIndicator
{
    [indicator stopAnimating];
}

但是,当其他班级发布此通知时:

NSNotification *note = [NSNotification notificationWithName:IOS_STOP_SYNC_INDICATOR object:nil];
[[NSNotificationCenter defaultCenter] postNotification:note];

地狱破裂了:

[FTRecordViewController stopSyncIndicator:]: unrecognized selector sent to instance 0x8d3bc00
2013-11-18 13:47:06.994 [1835:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[FTRecordViewController stopSyncIndicator:]: unrecognized selector sent to instance 0x8d3bc00'
*** First throw call stack:
(
    0   CoreFoundation                      0x01bf75e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x018f88b6 objc_exception_throw + 44
    2   CoreFoundation                      0x01c94903 -[NSObject(NSObject) doesNotRecognizeSelector:] …

我正在尝试使用NSCoding协议来读取和写入数据到plist.当我尝试编写[GolfHoles]时,我得到一个例外,它是NSObject的子类.我已经阅读了几个不同方法的帖子,但都没有帮助.

class GolfCourse: NSObject, NSCoding {
var name: String = ""
var location: String = ""
var holes: [GolfHole] = [GolfHole]()

init(holes: [GolfHole]) {
    self.holes = holes
}

// MARK: NSCoding Protocol
func encodeWithCoder(aCoder: NSCoder) {
    aCoder.encodeObject(name, forKey: "name")
    aCoder.encodeObject(location, forKey: "location")
    aCoder.encodeObject(holes, forKey: "holes") // exception here

}

required init(coder aDecoder: NSCoder) {
    super.init()
    name = aDecoder.decodeObjectForKey("name") as! String
    location = aDecoder.decodeObjectForKey("location") as! String
    holes = aDecoder.decodeObjectForKey("holes") as! [GolfHole]

}

override init() {
    super.init()
    for var i=0; i<18; i++ …