帮助!
我是 XCode 的新手，现在我遇到了一个问题。
当我在应用程序中使用以下代码并创建一个新的 ViewController 类 LoginViewController 时。
在 iPhone 中，该应用程序运行良好。但是当我在 iPad 上测试时它崩溃并在日志中显示以下内容:
2014-05-06 17:05:31.289 We Love HK[38711:60b] -[LoginViewController viewControllers]: unrecognized selector sent to instance 0x10942c3d0
2014-05-06 17:05:31.291 We Love HK[38711:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[LoginViewController viewControllers]: unrecognized selector sent to instance 0x10942c3d0'
*** First throw call stack:
(
0 CoreFoundation 0x00000001019fc495 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010175b99e objc_exception_throw + 43
2 CoreFoundation 0x0000000101a8d65d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00000001019edd8d ___forwarding___ + 973
4 CoreFoundation 0x00000001019ed938 _CF_forwarding_prep_0 + 120
5 We Love HK 0x0000000100001086 -[AppDelegate application:didFinishLaunchingWithOptions:] + 246
6 UIKit 0x00000001003033d9 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 264
7 UIKit 0x0000000100303be1 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1605
8 UIKit 0x0000000100307a0c -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 660
9 UIKit 0x0000000100318d4c -[UIApplication handleEvent:withNewEvent:] + 3189
10 UIKit 0x0000000100319216 -[UIApplication sendEvent:] + 79
11 UIKit 0x0000000100309086 _UIApplicationHandleEvent + 578
12 GraphicsServices 0x0000000103b2b71a _PurpleEventCallback + 762
13 GraphicsServices 0x0000000103b2b1e1 PurpleEventCallback + 35
14 CoreFoundation 0x000000010197e679 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
15 CoreFoundation 0x000000010197e44e __CFRunLoopDoSource1 + 478
16 CoreFoundation 0x00000001019a7903 __CFRunLoopRun + 1939
17 CoreFoundation 0x00000001019a6d83 CFRunLoopRunSpecific + 467
18 UIKit 0x00000001003072e1 -[UIApplication _run] + 609
19 UIKit 0x0000000100308e33 UIApplicationMain + 1010
20 We Love HK 0x00000001000044b3 main + 115
21 libdyld.dylib 0x000000010207f5fd start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
和LoginViewController.h:
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "KeychainItemWrapper.h"
@import Security;
@interface LoginViewController : UIViewController <UITextFieldDelegate>
@property (nonatomic, retain) IBOutlet UILabel *version_label;
@property (strong, nonatomic) IBOutlet UITextField *txtUsername;
@property (strong, nonatomic) IBOutlet UITextField *txtPassword;
- (IBAction) loginClicker:(id)sender;
- (IBAction) backgroundTap:(id)sender;
- (IBAction) keyboardDismiss: (id) sender;
- (IBAction) click_exit: (id) sender;
@end
登录 View Controller .m:
#import "LoginViewController.h"
@implementation LoginViewController;
@synthesize version_label;
@synthesize txtUsername;
@synthesize txtPassword;
-(void)viewDidLoad
{
KeychainItemWrapper *keychainWrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"UserAuthToken" accessGroup:nil];
NSString *version = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"]; // Get App Version
NSString *build = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"]; // Get App Build Number
version_label.numberOfLines = 0; // Enable \n break line
version_label.hidden = NO; // Disable Hidden
//[keychainWrapper resetKeychainItem];
version_label.text = [NSString stringWithFormat:@"V %@ (Build %@)", version, build]; // Change Version Label's Content
if ([keychainWrapper objectForKey:(__bridge id)(kSecAttrAccount)] && [keychainWrapper objectForKey:(__bridge id)(kSecValueData)]){
txtUsername.text = [keychainWrapper objectForKey:(__bridge id)(kSecAttrAccount)];
txtPassword.text = [keychainWrapper objectForKey:(__bridge id)(kSecValueData)];
}
}
-(IBAction) keyboardDismiss: (id) sender{
[txtUsername resignFirstResponder];
[txtPassword resignFirstResponder];
}
- (IBAction)backgroundTap:(id)sender {
[txtUsername resignFirstResponder];
[txtPassword resignFirstResponder];
}
- (IBAction)click_exit:(id)sender {
//[txtUsername resignFirstResponder];
//[txtPassword resignFirstResponder];
}
- (IBAction)loginClicker:(id)sender {
NSInteger success = 0;
@try {
if([[self.txtUsername text] isEqualToString:@""] || [[self.txtPassword text] isEqualToString:@""] ) {
[self alertStatus:@"請輸入帳號及密碼！" :@"登入失敗！" :0];
} else {
KeychainItemWrapper *keychainWrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"UserAuthToken" accessGroup:nil];
NSString *post =[[NSString alloc] initWithFormat:@"username=%@&password=%@",[self.txtUsername text],[self.txtPassword text]];
NSLog(@"PostData: %@",post);
NSURL *url=[NSURL URLWithString:@"http://ls.arefly.com/other/php/welovehk/login.php"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
//[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(@"Response code: %ld", (long)[response statusCode]);
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(@"Response ==> %@", responseData);
NSError *error = nil;
NSDictionary *jsonData = [NSJSONSerialization
JSONObjectWithData:urlData
options:NSJSONReadingMutableContainers
error:&error];
success = [jsonData[@"login_status"] integerValue];
NSLog(@"Success: %ld", (long)success);
if(success == 1)
{
NSLog(@"Login SUCCESS");
[keychainWrapper setObject:[self.txtUsername text] forKey:(__bridge id)(kSecAttrAccount)];
[keychainWrapper setObject:[self.txtPassword text] forKey:(__bridge id)(kSecValueData)];
NSString *name_msg = (NSString *) jsonData[@"name_msg"];
[self alertStatus:name_msg :@"歡迎！" :0];
} else {
NSString *error_msg = (NSString *) jsonData[@"error_message"];
[self alertStatus:error_msg :@"登入失敗！" :0];
txtPassword.text = @"";
}
} else {
//if (error) NSLog(@"Error: %@", error);
[self alertStatus:@"Connection Failed" :@"登入失敗！" :0];
txtPassword.text = @"";
}
}
}
@catch (NSException * e) {
NSLog(@"Exception: %@", e);
[self alertStatus:@"登入失敗！" :@"錯誤：" :0];
txtPassword.text = @"";
}
if (success) {
[self performSegueWithIdentifier:@"login_success" sender:self];
}
}
- (void) alertStatus:(NSString *)msg :(NSString *)title :(int) tag
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
message:msg
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
alertView.tag = tag;
[alertView show];
}
@end
这里还有 AppDelegate.m 中的 didFinishLaunchingWithOptions(但我不认为我改变了它的任何内容):
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;
UINavigationController *navigationController = [splitViewController.viewControllers lastObject];
splitViewController.delegate = (id)navigationController.topViewController;
}
return YES;
}
这是我的 Main_iPad.storyboard:
这是我的 Main_iPhone.storyboard:
谁能帮帮我？
谢谢!
更新
在我对 -(BOOL)application:didFinishLaunchingWithOptions: 中的整个 if block 进行注释后，它变得正常并且不会崩溃。
但是当我想做 [self performSegueWithIdentifier:@"login_success"sender:self];
2014-05-06 18:55:28.839 We Love HK[45660:60b] Success: 1
2014-05-06 18:55:28.839 We Love HK[45660:60b] Login SUCCESS
2014-05-06 18:55:28.887 We Love HK[45660:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Application tried to present a Split View Controllers modally <LoginViewController: 0x109429ca0>.'
*** First throw call stack:
(
0 CoreFoundation 0x00000001019fc495 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010175b99e objc_exception_throw + 43
2 UIKit 0x0000000100408c93 -[UIViewController presentViewController:withTransition:completion:] + 4027
3 We Love HK 0x0000000100005a35 -[LoginViewController loginClicker:] + 3813
4 UIKit 0x0000000100309f06 -[UIApplication sendAction:to:from:forEvent:] + 80
5 UIKit 0x0000000100309eb4 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 17
6 UIKit 0x00000001003e6880 -[UIControl _sendActionsForEvents:withEvent:] + 203
7 UIKit 0x00000001003e595d -[UIControl touchesBegan:withEvent:] + 219
8 UIKit 0x0000000100340b74 -[UIWindow _sendTouchesForEvent:] + 300
9 UIKit 0x00000001003416e4 -[UIWindow sendEvent:] + 925
10 UIKit 0x000000010031929a -[UIApplication sendEvent:] + 211
11 UIKit 0x0000000100306aed _UIApplicationHandleEventQueue + 9579
12 CoreFoundation 0x000000010198bd21 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
13 CoreFoundation 0x000000010198b5f2 __CFRunLoopDoSources0 + 242
14 CoreFoundation 0x00000001019a746f __CFRunLoopRun + 767
15 CoreFoundation 0x00000001019a6d83 CFRunLoopRunSpecific + 467
16 GraphicsServices 0x0000000103b29f04 GSEventRunModal + 161
17 UIKit 0x0000000100308e33 UIApplicationMain + 1010
18 We Love HK 0x00000001000045b3 main + 115
19 libdyld.dylib 0x000000010207f5fd start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
我还想知道如何从不同的地方设置 splitViewController.delegate？
最佳答案
您应该适本地共享您的 application:didFinishLaunchingWithOptions: 方法。
我很确定您在某处使用 LoginViewController 用作 UINavigationController 或 UISplitViewController。这就是为什么要在那里调用 viewControllers 方法的原因。
根据您的application:didFinishLaunchingWithOptions 方法，它在这里崩溃
UINavigationController *navigationController = [splitViewController.viewControllers lastObject];
可能你的 iPad Storyboard中有错误的 InitialViewController
关于ios - [登录 View Controller View Controller ] : unrecognized selector sent to instance 0x10942c3d0，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23490482/