我最近开始尝试编写我的第一个iPhone应用程序，我遇到了一些运行它的问题，我不确定这里发生了什么。对不起，如果这是一个愚蠢的noob错误。主要是我的代码中没有任何错误或警告，所以我很困惑为什么会这样。如果有人能提供帮助那就太棒了！
控制台输出：
2014-06-05 18:45:23.563 1RMCalculator[2239:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<ViewController 0x1095242c0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key reps.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010194a495 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001016a999e objc_exception_throw + 43
2 CoreFoundation 0x00000001019ce919 -[NSException raise] + 9
3 Foundation 0x000000010128a530 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259
4 CoreFoundation 0x0000000101946400 -[NSArray makeObjectsPerformSelector:] + 224
5 UIKit 0x00000001004b18a6 -[UINib instantiateWithOwner:options:] + 1131
6 UIKit 0x000000010034bb0c -[UIViewController _loadViewFromNibNamed:bundle:] + 245
7 UIKit 0x000000010034c149 -[UIViewController loadView] + 112
8 UIKit 0x000000010034c3b7 -[UIViewController loadViewIfRequired] + 75
9 UIKit 0x000000010034c777 -[UIViewController view] + 29
10 UIKit 0x000000010028c96b -[UIWindow addRootViewControllerViewIfPossible] + 58
11 UIKit 0x000000010028cc70 -[UIWindow _setHidden:forced:] + 282
12 UIKit 0x0000000100295ffa -[UIWindow makeKeyAndVisible] + 51
13 UIKit 0x0000000100251c98 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1788
14 UIKit 0x0000000100255a0c -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 660
15 UIKit 0x0000000100266d4c -[UIApplication handleEvent:withNewEvent:] + 3189
16 UIKit 0x0000000100267216 -[UIApplication sendEvent:] + 79
17 UIKit 0x0000000100257086 _UIApplicationHandleEvent + 578
18 GraphicsServices 0x0000000103ac371a _PurpleEventCallback + 762
19 GraphicsServices 0x0000000103ac31e1 PurpleEventCallback + 35
20 CoreFoundation 0x00000001018cc679 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
21 CoreFoundation 0x00000001018cc44e __CFRunLoopDoSource1 + 478
22 CoreFoundation 0x00000001018f5903 __CFRunLoopRun + 1939
23 CoreFoundation 0x00000001018f4d83 CFRunLoopRunSpecific + 467
24 UIKit 0x00000001002552e1 -[UIApplication _run] + 609
25 UIKit 0x0000000100256e33 UIApplicationMain + 1010
26 1RMCalculator 0x0000000100002883 main + 115
27 libdyld.dylib 0x0000000101fe25fd start + 1
28 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
ViewController.m
#import "ViewController.h"
@interface ViewController ()
@property (strong, nonatomic) IBOutlet UITextField *weightField;
@property (strong, nonatomic) IBOutlet UITextField *repsField;
@property (weak, nonatomic) IBOutlet UIButton *nintyFiveResult;
@property (weak, nonatomic) IBOutlet UIButton *nintyResult;
@property (weak, nonatomic) IBOutlet UIButton *eightyFiveResult;
@property (weak, nonatomic) IBOutlet UIButton *eightyResult;
@property (weak, nonatomic) IBOutlet UIButton *seventyFiveResult;
@property (weak, nonatomic) IBOutlet UIButton *seventyResult;
@property (weak, nonatomic) IBOutlet UIButton *sixtyFiveResult;
@property (weak, nonatomic) IBOutlet UIButton *sixtyResult;
@end
@implementation ViewController
- (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)weightModified:(UITextField *)sender {
if([self.weightField.text isEqualToString:(@"0")] == false && [self.repsField.text isEqualToString:(@"0")] == false){
// Gather reps and weight value
int reps = 0;
int weight = 0;
weight = [sender.text intValue];
reps = [self.repsField.text intValue];
int nintyFiveInt = [self oneRepMax :0.95 :reps :weight];
int nintyInt = [self oneRepMax :0.9 :reps :weight];
int eightyFiveInt = [self oneRepMax :0.85 :reps :weight];
int eightyInt = [self oneRepMax :0.8 :reps :weight];
int seventyFiveInt = [self oneRepMax :0.75 :reps :weight];
int seventyInt = [self oneRepMax :0.7 :reps :weight];
int sixtyFiveInt = [self oneRepMax :0.65 :reps :weight];
int sixtyInt = [self oneRepMax :0.6 :reps :weight];
NSString *nintyFiveWeight = [NSString stringWithFormat:@"95%%: %d", nintyFiveInt];
NSString *nintyWeight = [NSString stringWithFormat:@"95%%: %d", nintyInt];
NSString *eightyFiveWeight = [NSString stringWithFormat:@"95%%: %d", eightyFiveInt];
NSString *eightyWeight = [NSString stringWithFormat:@"95%%: %d", eightyInt];
NSString *seventyFiveWeight = [NSString stringWithFormat:@"95%%: %d", seventyFiveInt];
NSString *seventyWeight = [NSString stringWithFormat:@"95%%: %d", seventyInt];
NSString *sixtyFiveWeight = [NSString stringWithFormat:@"95%%: %d", sixtyFiveInt];
NSString *sixtyWeight = [NSString stringWithFormat:@"95%%: %d", sixtyInt];
[self.nintyFiveResult setTitle:nintyFiveWeight forState:UIControlStateNormal];
[self.nintyResult setTitle:nintyWeight forState:UIControlStateNormal];
[self.eightyFiveResult setTitle:eightyFiveWeight forState:UIControlStateNormal];
[self.eightyResult setTitle:eightyWeight forState:UIControlStateNormal];
[self.seventyFiveResult setTitle:seventyFiveWeight forState:UIControlStateNormal];
[self.seventyResult setTitle:seventyWeight forState:UIControlStateNormal];
[self.sixtyFiveResult setTitle:sixtyFiveWeight forState:UIControlStateNormal];
[self.sixtyResult setTitle:sixtyWeight forState:UIControlStateNormal];
}
}
- (IBAction)repsModified:(UITextField *)sender {
if([self.weightField.text isEqualToString:(@"0")] == false && [self.repsField.text isEqualToString:(@"0")] == false){
// Gather reps and weight value
int reps = 0;
int weight = 0;
weight = [sender.text intValue];
reps = [self.repsField.text intValue];
int nintyFiveInt = [self oneRepMax :0.95 :reps :weight];
int nintyInt = [self oneRepMax :0.9 :reps :weight];
int eightyFiveInt = [self oneRepMax :0.85 :reps :weight];
int eightyInt = [self oneRepMax :0.8 :reps :weight];
int seventyFiveInt = [self oneRepMax :0.75 :reps :weight];
int seventyInt = [self oneRepMax :0.7 :reps :weight];
int sixtyFiveInt = [self oneRepMax :0.65 :reps :weight];
int sixtyInt = [self oneRepMax :0.6 :reps :weight];
NSString *nintyFiveWeight = [NSString stringWithFormat:@"95%%: %d", nintyFiveInt];
NSString *nintyWeight = [NSString stringWithFormat:@"95%%: %d", nintyInt];
NSString *eightyFiveWeight = [NSString stringWithFormat:@"95%%: %d", eightyFiveInt];
NSString *eightyWeight = [NSString stringWithFormat:@"95%%: %d", eightyInt];
NSString *seventyFiveWeight = [NSString stringWithFormat:@"95%%: %d", seventyFiveInt];
NSString *seventyWeight = [NSString stringWithFormat:@"95%%: %d", seventyInt];
NSString *sixtyFiveWeight = [NSString stringWithFormat:@"95%%: %d", sixtyFiveInt];
NSString *sixtyWeight = [NSString stringWithFormat:@"95%%: %d", sixtyInt];
[self.nintyFiveResult setTitle:nintyFiveWeight forState:UIControlStateNormal];
[self.nintyResult setTitle:nintyWeight forState:UIControlStateNormal];
[self.eightyFiveResult setTitle:eightyFiveWeight forState:UIControlStateNormal];
[self.eightyResult setTitle:eightyWeight forState:UIControlStateNormal];
[self.seventyFiveResult setTitle:seventyFiveWeight forState:UIControlStateNormal];
[self.seventyResult setTitle:seventyWeight forState:UIControlStateNormal];
[self.sixtyFiveResult setTitle:sixtyFiveWeight forState:UIControlStateNormal];
[self.sixtyResult setTitle:sixtyWeight forState:UIControlStateNormal];
}
}
- (int)oneRepMax:(int) percent :(int) numReps :(int) weightToLift{
return percent*(weightToLift*(numReps/30));
}
@end
如果好奇我正在创建一个基本的1RM计算器。我认为这对于一个起点来说很容易。该页面有两个文本字段和八个按钮。
答案 0 :(得分：2)
此问题很可能与界面构建器有关。你是否在任何IBOutlets周围洗牌并且可能留下一个孤儿？如果一切都按顺序查看，那么也许你删除了一个，只需要做一个干净的构建。转到Xcode管理器＆gt;项目＆gt; ＆＃34;删除＆＃34;派生数据。然后执行一个干净的构建，看看是否能解决问题。
答案 1 :(得分：0)
要检查的另一件事是什么？您是否在界面构建器中的任何视图上设置了“用户定义的运行时属性”？ （它们显示在每个视图的“Identity Inspector”中。如果这些视图指定了不存在的对象属性，则会出现此错误。
新手不太可能使用该功能，但也许您正在按照教程向您展示如何使用该功能。这至少值得一提。