我已经在谷歌搜索过，并且堆叠溢出以寻求解决方案，但我无法找到解决问题的答案。很抱歉这篇长篇文章，因为我试图提供尽可能多的信息。我是iOS和Objective-c的新手，但由于被我的公司要求从Android切换而不是一般的编程，所以任何帮助都表示赞赏。
我试图从另一个类的TextField为一个类中的NSString赋值，但是我收到错误：
**-[ViewController name:]: unrecognized selector sent to instance 0x78712fe0**
当我在模拟器中运行应用程序时。
相关代码：
//UserInfo.h
#import <Foundation/Foundation.h>
@interface UserInfo : NSObject <NSCoding>
@property (nonatomic, strong) NSString *name;
@property (nonatomic, strong) NSString *age;
@property (nonatomic, strong) NSString *address;
@end
//UserInfo.m
#import "UserInfo.h"
static NSString *nameKey = @"userName";
static NSString *ageKey = @"userAge";
static NSString *addressKey = @"userAddress";
static NSString *userInfoKey = @"userInfoKey";
@implementation UserInfo
@synthesize name;
@synthesize age;
@synthesize address;
- (id) initWithCoder:(NSCoder *)coder
{
self = [super init];
self.name = [coder decodeObjectForKey:nameKey];
self.age = [coder decodeObjectForKey:ageKey];
self.address = [coder decodeObjectForKey:addressKey];
return self;
}
- (void)encodeWithCoder:(NSCoder *)coder
{
[coder encodeObject:self.name forKey:nameKey];
[coder encodeObject:self.age forKey:ageKey];
[coder encodeObject:self.address forKey:addressKey];
}
@end
//ViewController.h
#import <UIKit/UIKit.h>
#import "UserInfo.h"
@interface ViewController : UIViewController <UITextFieldDelegate, UITextViewDelegate, NSCoding>
@property (nonatomic, strong) UserInfo *userInfoObject;
@property (nonatomic, weak) IBOutlet UILabel *titleLabel;
@property (nonatomic, weak) IBOutlet UILabel *nameLabel;
@property (nonatomic, weak) IBOutlet UILabel *ageLabel;
@property (nonatomic, weak) IBOutlet UILabel *addressLabel;
@property (nonatomic, weak) IBOutlet UITextField *nameText;
@property (nonatomic, weak) IBOutlet UITextField *ageText;
@property (nonatomic, weak) IBOutlet UITextField *addressText;
@property (nonatomic, weak) IBOutlet UIButton *saveBtn;
- (IBAction)saveBtnTouched:(id)sender;
- (void) saveUserInfo;
- (void) loadUserInfo;
- (void) setUserInterfaceValues;
- (IBAction)nameText:(id)sender;
- (IBAction)ageText:(id)sender;
- (IBAction)addressText:(id)sender;
@end
//ViewController.m
#import "ViewController.h"
#import "UserInfo.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize titleLabel;
@synthesize nameLabel;
@synthesize ageLabel;
@synthesize addressLabel;
@synthesize nameText;
@synthesize ageText;
@synthesize addressText;
@synthesize saveBtn;
static NSString *userInfoKey = @"userInfoKey";
- (void)viewDidLoad {
[super viewDidLoad];
[self loadUserInfo];
if(!self.userInfoObject)
{
self.userInfoObject = [[UserInfo alloc] init];
}
[self setUserInterfaceValues];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
self.saveBtn.enabled = YES;
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField*)textField
{
return YES;
}
- (BOOL) textFieldShouldEndEditing:(UITextField *)textField
{
[self.nameText resignFirstResponder];
[self.ageText resignFirstResponder];
[self.addressText resignFirstResponder];
return YES;
}
- (IBAction)saveBtnTouched:(id)sender
{
NSLog(@"%@ was entered into the name field", self.nameText.text);
NSLog(@"%@ was entered into the age field", self.ageText.text);
NSLog(@"%@ was entered into the address field", self.addressText.text);
[self textFieldShouldEndEditing:self.nameText];
[self textFieldShouldEndEditing:self.ageText];
[self textFieldShouldEndEditing:self.addressText];
self.userInfoObject.name = self.nameText.text;
self.userInfoObject.age = self.ageText.text;
self.userInfoObject.address = self.addressText.text;
[self saveUserInfo];
self.saveBtn.enabled = NO;
}
- (void)saveUserInfo
{
NSData *userInfoData = [NSKeyedArchiver archivedDataWithRootObject:self.userInfoObject];
[[NSUserDefaults standardUserDefaults] setObject:userInfoData forKey:userInfoKey];
}
- (void)loadUserInfo
{
NSData *userInfoData = [[NSUserDefaults standardUserDefaults] objectForKey:userInfoKey];
if(userInfoData)
{
self.userInfoObject = [NSKeyedUnarchiver unarchiveObjectWithData:userInfoData];
}
}
- (void) setUserInterfaceValues
{
self.nameText.text = self.userInfoObject.name;
self.ageText.text = self.userInfoObject.age;
self.addressText.text = self.userInfoObject.address;
}
- (IBAction)nameText:(id)sender {
}
- (IBAction)ageText:(id)sender {
}
- (IBAction)addressText:(id)sender {
}
@end
//AppDelegate.h
#import <UIKit/UIKit.h>
#import "ViewController.h"
#import "UserInfo.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) ViewController *viewController;
@end
//AppDelegate.m
#import "AppDelegate.h"
#import "ViewController.h"
#import "UserInfo.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
//all the other generated methods. Taken out due to space.
@end
设置三个断点，这些断点是问题的根源：
从ViewController.m，- (void)setUserInterfaceValues
self.nameText.text = self.userInfoObject.name;
（我认为这也适用于它下面的另外两行）
同样来自ViewController.m，在- (void)viewDidLoad中
[self setUserInterfaceValues];
最后来自AppDelegate.m，在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
self.window.rootViewController = self.viewController;
根据我的理解，并从搜索此问题中学到，应用程序正在尝试将数据发送到不存在的内容，NSString名称是罪魁祸首。其他人建议确保我的.xib文件连接到ViewController，我已经验证它是。
作为另一点信息，我没有为这个应用程序使用故事板，而是使用界面构建器。我知道故事板有优点，我想使用它们，但我的公司使用界面构建器并以编程方式执行很多操作，因此我学会了没有开发。
[编辑]：伊恩已经解决了问题。