I can't seem to get an online GIF image to load into an NSImageView. Please see my code below and offer some comments to remedy this.
#import <Foundation/Foundation.h>
#interface ImageFromUrl : NSObject
#property (strong) NSString *urlString;
#property (strong) NSURL *url;
#property (strong) NSImage *radarGif;
#property (weak) IBOutlet NSImageView *radarGifView;
- (void)displayUrlImage:(id)sender;
#end
and
#import "ImageFromUrl.h"
#implementation ImageFromUrl
#synthesize urlString, url, radarGif, radarGifView;
- (void)displayUrlImage:(id)sender {
urlString = #"http://icons.wunderground.com/data/640x480/2xradarb5.gif";
url = [NSURL URLWithString:urlString];
radarGif = [[NSImage alloc] initWithContentsOfURL:url];
[radarGifView setImage:radarGif];
}
#end
I am receiving no errors when I run the application and the image of the GIF is not showing in the window.
I put this code in a project, and it worked fine, so the code works. How did you connect the outlet to the image view (do you have an object in IB that's an instance of this class)? How are you calling the method (and from where)?
Related
I am trying to make a basic search tool in cocoa. I am trying to take the string from a textfield, edit it to make a link that searches the string in google, and then feed that into the WebView. However, Xcode is not letting me use the variable I made for the Web View. I'm getting errors along the lines of "Unknown type name 'WebView'" and "Bad Receiver type '*int'". Any help would be appreciated. Here's my code for
NewWindowController.h:
#import <Cocoa/Cocoa.h>
#interface NewWindowController : NSWindowController
#property (weak) IBOutlet NSComboBox *searchselector;
- (IBAction)onclickGO:(id)sender;
#property (weak) IBOutlet WebView *webv;
#end
NewWindowController.m:
#import "NewWindowController.h"
#interface NewWindowController ()
#end
#implementation NewWindowController
#synthesize searchselector, webv;
- (void)windowDidLoad {
[super windowDidLoad];
NSLog(#"Window did load");
}
- (IBAction)onclickGO:(id)sender {
NSInteger *indexofsearch = [searchselector indexOfSelectedItem];
NSLog(#"%d",indexofsearch);
//test for web view to load page
[[webv mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString: #"https://google.com"]]];
}
#end
WebView is part of WebKit.framework, which is not included in the default projects.
Add #import WebKit; to the top of whatever file you're referencing the WebView object in.
Add WebKit.framework to "Link Binary with Libraries" (in Build Phases)
I have tried with the 3 or 4 posts about this here but none use file path and I cannot get this working with WKWebView, it works with UIWebView, please can someone help me.
Yes, I am very new to this, I tried all day before posting here tonight, so easy to understand instructions would be great. Thanks.
.h file:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
#property (weak, nonatomic) IBOutlet UIWebView *contentWebView;
#end
.m file:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize contentWebView;
- (void)viewDidLoad {
[super viewDidLoad];
NSString *filePath = [[NSBundle mainBundle]pathForResource:#"LockBackground" ofType:#"html"];
NSURL * fileURL = [NSURL fileURLWithPath:filePath isDirectory:NO];
NSURLRequest * myNSURLRequest = [[NSURLRequest alloc]initWithURL:fileURL];
[contentWebView loadRequest:myNSURLRequest];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Simply changing
#property (weak, nonatomic) IBOutlet UIWebView *contentWebView;
to
#property (weak, nonatomic) IBOutlet WKWebView *contentWebView;
should work.
If you intend to provide support for both iOS 7 and iOS 8, you'll have to declare two variables and add the following verification:
if ([WKWebView class]) {
// do new webview stuff
}
else {
// do old webview stuff
}
So I'm creating a Settings view (SettingsViewController) for my app, and the view contains 5 switches. I'm looking to accomplish the following:
if switch is on, filter TableView to only display items that contain 'Arthritis'. if switch is off, display all items.
Note: the TableView is located on another view (ViewController).
Now even though I've imported ViewController.h onto my SettingsViewController.m file, it's telling me that StrainTableView is unidentified. Any idea as to why? See code below (you can ignore the PickerView references).
SettingsViewController.h
#interface SettingsViewController : UIViewController {
IBOutlet UISwitch *ArthritisSwitch;
IBOutlet UIView *CancerSwitch;
IBOutlet UISwitch *HIVSwitch;
IBOutlet UISwitch *InsomSwitch;
IBOutlet UISwitch *MigSwitch;
IBOutlet UILabel *mylabel;
NSArray *arthritisResults;
NSArray *Strains;
}
-(IBAction)switchtheswitch:(id)sender;
#property (nonatomic, retain) NSArray *arthritisResults;
#end
SettingsViewController.m
#import "SettingsViewController.h"
#import "ViewController.h"
#interface SettingsViewController ()
#end
#implementation SettingsViewController
#synthesize arthritisResults;
-(IBAction)switchtheswitch:(id)sender; {
if (ArthritisSwitch.on) {
NSPredicate *ailmentPredicate = [NSPredicate predicateWithFormat:#"title ==[c] 'Arthritis'"];
arthritisResults = [Strains filteredArrayUsingPredicate:ailmentPredicate];
// Pass any objects to the view controller here, like...
[StrainTableView setSearchResults: [arthritisResults copy]];
NSLog(#"%#", arthritisResults);
}
else {
[Strains count];
}
}
ViewController.h
#import "PickerViewController.h"
#interface ViewController : UIViewController <PickerViewControllerDelegate, UITableViewDataSource,UITableViewDelegate>
{
NSArray *searchResults;
// NSArray *Strains;
NSMutableData *data;
NSMutableArray *dataArray;
NSArray *Strains;
}
#property (nonatomic, strong) NSMutableArray * favoritesArray;
#property (nonatomic, retain) NSArray *searchResults;
#property (strong, nonatomic) IBOutlet UITableView *StrainTableView;
#end
Just importing a class does not allow you to use a property from that class. You need to get an instance of the ViewController class (let's call it vc for example), and then use it like so:
[vc.StrainTableView setSearchResults: [arthritisResults copy]];
How you make that instance of ViewController depends on the structure of your app. You probably don't just want to alloc init one, but get a reference to one that you already have.
BTW, your code would be easier to read and understand if you conform to the naming convention of using lowercase letters to start properties and methods (and capitals for classes).
I have spent about a whole day of grief trying to solve this question, and this is my last resort. I have a web view in my OS X app. I made a web browser and it is working great with navigation arrows and all, but when I try to make a home page (google) It does not load on the WebView (called webber in the code). I made sure all the outlets are connected. here is my code for AppDelegate.h:
#import <Cocoa/Cocoa.h>
#import <WebKit/WebKit.h>
#interface AppDelegate : NSObject <NSApplicationDelegate>{
NSWindow *window;
NSTextField *urlBox;
IBOutlet WebView *webber;
IBOutlet NSTextField *googleSearchField;
}
-(IBAction)search;
#property (assign) IBOutlet NSWindow *window;
#end
and here is the code for AppDelegate.m:
#import "AppDelegate.h"
#implementation AppDelegate
- (void)windowControllerDidLoadNib:(NSWindowController *)windowController{
NSLog(#"Nib loaded");
NSString *urlText = #"http://www.google.com";
[[webber mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlText]]];
}
-(IBAction)search
{
NSString *searchString = [googleSearchField stringValue];
NSString *searchURL = [NSString stringWithFormat:#"http://www.google.com/search?q=%#", searchString];
[[webber mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString: searchURL]]];
}
#end
I would very much appreciate ANY form of help and I am very desperate. Please remember that I am only in 6th grade, and a step by step guide or just plain code is what I am looking for. Thank you for your time! download the Xcode project here: http://www.cadenfarley.com/cobra/Download.html Scroll down until you see "Xcode project here"
Your windowControllerDidLoadNib: method is never called because you don't have an NSWindowController anywhere. Rename that method to - (void)awakeFromNib and it should work.
How can I access to ViewController property from another class ?
(the ViewController was created by XCode)
this is code of ViewController.h:
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#interface ViewController : UIViewController{
AppDelegate *appDelegate; //il delegate disponibile per tutta la classe
int numPag; //indice array (sulle pagine html da visualizzare)
NSString *path;
NSURL *baseURL;
NSString *file;
NSString *contentFile;
}
- (IBAction)sottrai:(id)sender;
- (IBAction)aggiungi:(id)sender;
#property (strong, nonatomic) IBOutlet UILabel *valore;
#property (strong, nonatomic) IBOutlet UIWebView *web;
#end
thanks!
[EDIT]
I use Xcode 4.3.2 and the code of AppDelegate.m not find something like:
self.viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
Now, I put in the method didFinishLaunchingWithOptions:(into AppDelegate.m) this code:
viewController = [[UIViewController alloc] initWithNibName:#"ViewController" bundle:nil];
[viewController.web loadHTMLString:contentFile baseURL:baseURL];
adding in the file AppDelegate.h the variable viewController:
#import <UIKit/UIKit.h>
#interface AppDelegate : UIResponder <UIApplicationDelegate>{
NSArray *pageInItalian;
NSArray *pageInEnglish;
UIViewController *viewController;
}
#property (strong, nonatomic) NSArray *pageInLanguage;
#property (strong, nonatomic) UIWindow *window;
#end
I did it correctly? the error is: Property 'web' not found on object of type 'UIViewController *'
I think this post might answer your question
How can I access variables from another class?
You need to make your variable accessible from foreign classes (with #property and #synthesize) and then your foreign class need to know your instance of ViewController
[EDIT]
In your AppDelegate.m, there must be a line like this one :
self.viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
This is where your ViewController is instantiate. From there, you can access every property of your ViewController.
[EDIT]
You need to add the following at the beginning of your implementation
#implementation ViewController
#synthesize web;