I can't see the webview when I launch tha app..
In the delegate that's my code
#import <Cocoa/Cocoa.h>
#include "NewsViewController.h"
#interface AppDelegate : NSObject <NSApplicationDelegate>
#property (assign) IBOutlet NSWindow *window;
#property (nonatomic,strong) IBOutlet NSSplitView *splitView;
#property (nonatomic,strong) IBOutlet NewsViewController *newsViewController;
#end
#import "AppDelegate.h"
#implementation AppDelegate
- (void)dealloc
{
[super dealloc];
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
// 1. Create the master View Controller
self.newsViewController = [[NewsViewController alloc] initWithNibName:#"NewsViewController" bundle:nil];
// 2. Add the view controller to the Window's content view
[self.splitView addSubview:self.newsViewController.view];
}
#end
That's my viewcontroller
#import <Cocoa/Cocoa.h>
#import <WebKit/WebKit.h>
#interface NewsViewController : NSViewController{
IBOutlet WebView *web;
}
#property (assign) IBOutlet WebView *web;
#end
#import "NewsViewController.h"
#interface NewsViewController ()
#end
#implementation NewsViewController
#synthesize web;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
}
return self;
}
-(void)loadView{
NSString *urlAddress = #"http://www.google.com/";
NSURL *url = [NSURL URLWithString:urlAddress];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[[web mainFrame] loadRequest:requestObj];
}
#end
if I out one label on my view in the controller everything is fine but if I put a webview I see only a grey window.
Why this?
thanks
I do believe you need to call [super loadView] in your loadView implementation.
Related
My cpViewController has a button that modal segues to cpScanViewController. I want to have cpScanViewController inform ViewController with a string when it has completed a successful scan. After reading numerous articles online, I believe delegation is the best way to do this?
Is the delegate being set correctly?
How does the delegate inform the cpViewController?
cpScanViewController.h
#import <UIKit/UIKit.h>
#protocol ScanDelegate <NSObject>
-(void)receivedUPC:(NSString *)Scan;
#end
#interface cpScanViewController : UIViewController
#property (nonatomic, weak) id <ScanDelegate> delegate;
#property (nonatomic, retain) NSString *UPC;
-(void)checkUPC;
#end
cpScanViewController.m
#interface cpScanViewController ()
{
NSString *UPC;
}
#end
#implementation cpScanViewController
#synthesize delegate;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
-(void)doSomeScanStuff
{
UPC = #"a string"
// even tried
[delegate receivedUPC:UPC];
}
-(void)checkUPC
{
}
#end
cpViewController.h
#import <UIKit/UIKit.h>
#import "cpScanViewController.h"
#interface cpViewController : UIViewController <ScanDelegate>
#end
cpViewController.m
#interface cpViewController ()
{
cpScanViewController *cp;
}
#end
#implementation cpViewController
- (void)viewDidLoad
{
// set delegate
cp = [[cpScanViewController alloc] init];
[cp setDelegate:self];
}
-(void)receivedUPC:(NSString *)Scan{
// Nothing happening
NSLog(#"%#", Scan);
NSLog(#"The %#", cp.UPC);
}
#end
Because you are not calling receivedUPC method from your cpScanViewController class. You need to add [_delegate receivedUPC:self], some where in order to invoke this delegat method in cpViewController class.
I was able to get it working by using the method:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
cpScanViewController *vd = (cpScanViewController *)[segue destinationViewController];
vd.delegate = self;
}
Because I made the connection in storyboards I didn't realize it needed to have the method.
I am very new to iOS programming and am making a simple app. the first UITabBarItem loads a page but before it loads there is a label. I am trying to make the label disappear after the web page loads but it doesn't work. I believe I need to set the web view delegate but I don't know how.
firstcontroller.h
#import <UIKit/UIKit.h>
#interface OTFFirstViewController : UIViewController
#property (strong, nonatomic) IBOutlet UIWebView *webPage;
#property (strong, nonatomic) IBOutlet UILabel *pageLoading;
#end
firstcontroller.m
#import "FirstViewController.h"
#interface FirstViewController ()
#end
#implementation FirstViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *fullURL = #"http://asdf.com";
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[_webPage loadRequest:requestObj];
}
- (void)webViewDidFinishLoad:(UIWebView *)_webPage
{
_pageLoading.hidden = YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Insert _webPage.delegate = self; before calling loadRequest:.
You should alse modify interface definition to #interface OTFFirstViewController : UIViewController <UIWebViewDelegate>.
Question with trying to simply clear a mutablearray in another class in objective C
the code all runs fine, just the data doesnt get wiped....
SecondViewController.h
#interface SecondViewController : UIViewController <UITableViewDelegate,UITextFieldDelegate,ABPeoplePickerNavigationControllerDelegate>
{
AppDelegate *appDelegate;
}
#property (nonatomic, retain) NSMutableArray *contactsArray;
Thats the declaration of the mutablearray...
then from the class that i am trying to delete it.
listViewController.h
#import "SecondViewController.h"
#interface ListViewController : UIViewController <UITableViewDelegate,ABPeoplePickerNavigationControllerDelegate,UITabBarControllerDelegate>{
AppDelegate *appDelegate;
SecondViewController *secondViewControl;
}
#property (nonatomic, retain) IBOutlet UITableView *table;
then in the main file i use the code
[secondViewControl.contactsArray removeAllObjects];
but then when i check the array it has not been emptied...
EDIT:
#implementation ListViewController
#synthesize table;
/*- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}*/
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
appDelegate = (AppDelegate *)[[UIApplication sharedApplication]delegate];
secondViewControl = [[SecondViewController alloc]init];
I have two error :No visible #interface for 'UIWebView' declares the selector 'highlightAllOccurencesOfString:'
another one:No visible #interface for 'UIWebView' declares the selector 'removeAllHighlights'
Please someone help me.
WBSecondViewController.h
#import <UIKit/UIKit.h>
#interface WBSecondViewController : UIViewController <UIWebViewDelegate, UIScrollViewDelegate>{
}
#property (weak, nonatomic) IBOutlet UIWebView *webView;
#property(copy) NSArray *menuItems;
#property (weak, nonatomic) IBOutlet UIToolbar *webToolBar;
- (IBAction)back:(id)sender;
- (IBAction)foward:(id)sender;
-(IBAction)searchButtonPressed:(id)sender;
-(IBAction)clearHighlights:(id)sender;
#end
WBSecondViewController.m
#import "WBSecondViewController.h"
#import "Word.h"
#import "WordController.h"
#import "AddWordController.h"
#import "WBAppDelegate.h"
#import "WBFirstViewController.h"
#import "SearchWebView.h"
#interface WBSecondViewController ()
#end
#implementation WBSecondViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Second", #"Second");
self.tabBarItem.image = [UIImage imageNamed:#"second"];
}
return self;
}
- (void)viewDidLoad
{
UIMenuController *menu = [UIMenuController sharedMenuController];
[super viewDidLoad];
NSURL *theURL = [NSURL URLWithString:#"http://www.google.co.jp"];
[_webView loadRequest:[NSURLRequest requestWithURL:theURL]];
}
-(IBAction)searchButtonPressed:(id)sender{
[_webView highlightAllOccurencesOfString:#"cat"];
}
-(IBAction)clearHighlights:(id)sender{
[_webView removeAllHighlights];
}
SearchWebView.h
#import <Foundation/Foundation.h>
#interface SearchWebView : UIWebView
- (NSInteger)highlightAllOccurencesOfString:(NSString*)str;
- (void)removeAllHighlights;
#end
SearchWebView.m
#import "SearchWebView.h"
#implementation SearchWebView
- (NSInteger)highlightAllOccurencesOfString:(NSString*)str
{
NSString *path = [[NSBundle mainBundle] pathForResource:#"UIWebViewSearch" ofType:#"js"];
NSString *jsCode = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
[self stringByEvaluatingJavaScriptFromString:jsCode];
NSString *startSearch = [NSString stringWithFormat:#"uiWebview_HighlightAllOccurencesOfString('%#')",str];
[self stringByEvaluatingJavaScriptFromString:startSearch];
NSString *result = [self stringByEvaluatingJavaScriptFromString:#"uiWebview_SearchResultCount"];
return [result integerValue];
}
- (void)removeAllHighlights
{
[self stringByEvaluatingJavaScriptFromString:#"uiWebview_RemoveAllHighlights()"];
}
#end
U have subclassed uiwebview and called it SearchWebView but then when you create an instance of web view in your wbsecondviewcontroller, you use a regular web view instead of the subclass that you created and the regular web view does not have the two extra methods that you defined for that custom one. Above #interface in the wbsecondviewcontroller.h do #class SearchWebView. Then where you declare the property UiWebView, declare it as a SearchWebView instead. In the .m file of the wbsecondviewcontroller do #import "SearchWebView.h"
The idea is that I hava a custom view where the user can drag and drop one or more files and the controller is able to save the path of files into an array.
How can I run a method from AppDelegate after the user drops the file in the interface?
I have these files:
AppDelegate.h:
#import <Cocoa/Cocoa.h>
#interface AppDelegate : NSObject <NSApplicationDelegate>
#property (assign) IBOutlet NSScrollView *table;
#property (assign) IBOutlet NSWindow *window;
#end
AppDelegate.m:
#import "AppDelegate.h"
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
}
#end
DropView.h:
#import <Cocoa/Cocoa.h>
#interface DropView : NSView <NSDraggingDestination>
#property (assign) IBOutlet NSScrollView *table;
#property NSArray *draggedFilePaths;
#end
DropView.m:
#import "DropView.h"
#implementation DropView
#synthesize draggedFilePaths;
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self registerForDraggedTypes:[NSArray arrayWithObject:NSURLPboardType]];
}
return self;
}
-(NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender{
return NSDragOperationGeneric;
}
-(NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender{
return NSDragOperationCopy;
}
-(BOOL)prepareForDragOperation:(id<NSDraggingInfo>)sender{
return YES;
}
-(BOOL)performDragOperation:(id<NSDraggingInfo>)sender{
NSPasteboard* prb;
prb= [sender draggingPasteboard];
draggedFilePaths = [prb propertyListForType:NSFilenamesPboardType];
return YES;
}
- (void)concludeDragOperation:(id<NSDraggingInfo>)sender{
[self setNeedsDisplay:YES];
NSLog(#"path %#",draggedFilePaths);
[self populateTable];
}
- (void)drawRect:(NSRect)dirtyRect
{
}
-(void)populateTable{
NSLog(#"yes");
}
#end
Import AppDelegate.h into DropView.m, and call the method you want to run from the performDragOperation: method.
-(BOOL)performDragOperation:(id<NSDraggingInfo>)sender{
NSPasteboard* prb;
prb= [sender draggingPasteboard];
draggedFilePaths = [prb propertyListForType:NSFilenamesPboardType];
[(AppDelegate *)[[NSApplication sharedApplication]delegate] doWhatever:draggedFilePaths];
return YES;
}
Where doWhatever: is a method implemented in the app delegate.