iOS应用程序在测试启动时抛出错误

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我对此很陌生，并且试图制作一个简单的温度转换应用程序。下面是有没有被抛出错误：iOS应用程序在测试启动时抛出错误

2014-02-28 20:35:46.954 Temperature Converter[5899:70b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<TemperatureConverterViewController 0x8a939a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key convertTemperatureButton.' 
*** First throw call stack: 
(
0 CoreFoundation      0x017395e4 __exceptionPreprocess + 180 
1 libobjc.A.dylib      0x014bc8b6 objc_exception_throw + 44 
2 CoreFoundation      0x017c96a1 -[NSException raise] + 17 
3 Foundation       0x0117d9ee -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282 
4 Foundation       0x010e9cfb _NSSetUsingKeyValueSetter + 88 
5 Foundation       0x010e9253 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267 
6 Foundation       0x0114b70a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412 
7 UIKit        0x004cca15 -[UIRuntimeOutletConnection connect] + 106 
8 libobjc.A.dylib      0x014ce7d2 -[NSObject performSelector:] + 62 
9 CoreFoundation      0x01734b6a -[NSArray makeObjectsPerformSelector:] + 314 
10 UIKit        0x004cb56e -[UINib instantiateWithOwner:options:] + 1417 
11 UIKit        0x0033d605 -[UIViewController _loadViewFromNibNamed:bundle:] + 280 
12 UIKit        0x0033ddad -[UIViewController loadView] + 302 
13 UIKit        0x0033e0ae -[UIViewController loadViewIfRequired] + 78 
14 UIKit        0x0033e5b4 -[UIViewController view] + 35 
15 UIKit        0x002669fd -[UIWindow addRootViewControllerViewIfPossible] + 66 
16 UIKit        0x00266d97 -[UIWindow _setHidden:forced:] + 312 
17 UIKit        0x0026702d -[UIWindow _orderFrontWithoutMakingKey] + 49 
18 UIKit        0x0027189a -[UIWindow makeKeyAndVisible] + 65 
19 UIKit        0x00224cd0 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1851 
20 UIKit        0x002293a8 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824 
21 UIKit        0x0023d87c -[UIApplication handleEvent:withNewEvent:] + 3447 
22 UIKit        0x0023dde9 -[UIApplication sendEvent:] + 85 
23 UIKit        0x0022b025 _UIApplicationHandleEvent + 736 
24 GraphicsServices     0x036e02f6 _PurpleEventCallback + 776 
25 GraphicsServices     0x036dfe01 PurpleEventCallback + 46 
26 CoreFoundation      0x016b4d65 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53 
27 CoreFoundation      0x016b4a9b __CFRunLoopDoSource1 + 523 
28 CoreFoundation      0x016df77c __CFRunLoopRun + 2156 
29 CoreFoundation      0x016deac3 CFRunLoopRunSpecific + 467 
30 CoreFoundation      0x016de8db CFRunLoopRunInMode + 123 
31 UIKit        0x00228add -[UIApplication _run] + 840 
32 UIKit        0x0022ad3b UIApplicationMain + 1225 
33 Temperature Converter    0x00002eed main + 141 
34 libdyld.dylib      0x01d7770d start + 1 
35 ???         0x00000001 0x0 + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException

现在，据我所知，有一些错误的，我按钮的功能所以这里是我的接口和实现：

#import <UIKit/UIKit.h> 

@interface TemperatureConverterViewController : UIViewController 

@property (weak, nonatomic) IBOutlet UITextField *temperatureField; 
@property (weak, nonatomic) IBOutlet UILabel *conversionResult; 

- (IBAction)convertToFahrenheit:(id)sender; 

@end

继承人的实现（.M文件）

#import "TemperatureConverterViewController.h" 

@interface TemperatureConverterViewController() 

@end 

@implementation TemperatureConverterViewController 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
// Do any additional setup after loading the view, typically from a nib. 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

- (IBAction)convertToFahrenheit:(id)sender { 
    double celsius = [_temperatureField.text doubleValue]; 
    double fahrenheit = (celsius+32)*1.8; 
    NSString *result = [[NSString alloc] initWithFormat: @"Fahrenheit: %f",fahrenheit]; 
    _conversionResult.text = result; 
} 
@end

任何人都可以找到问题吗？我不能:(

谢谢。

UPDATE！

当我按我的文本字段中的虚拟设备，键盘的表演，但它并没有消失的时候我按下按钮！任何人都知道我是如何解决这一问题？

太谢谢你了！

来源

2014-02-28 rshah

检查您的XIB或故事板的连接，并确保一切都正确挂接。有可能你可能已经连接了一个IBOutlet，你之后从你的界面中删除了这个IBOutlet，这个IBOutlet仍然在文件所有者连接中出现。 – Aaron

设置异常断点。当它被击中时会连续几次，并且会有错误信息。 – zaph

ConvertTemperature按钮没有连接 - 可能是一个IBOutlet – GuybrushThreepwood

检查您的XIB或故事板的连接，并确保一切都正确挂接。我敢打赌，你连接了一个IBOutlet，你以后从你的界面中删除了这个IBOutlet，这个界面仍然在Files Owner连接中。

为了解决第二个问题，并取消键盘尝试在IBAction为以下几点：

[self.temperatureField resignFirstResponder];

来源

2014-02-28 16:53:14 Aaron

你有没有t将UIViewController的类设置为接口构建中的TemperatureConverterViewController类。

设置类将解决您的问题..为我做ATLEAST

来源

2014-02-28 16:51:24 Harsh

iOS应用程序在测试启动时抛出错误

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