I need a gallery in my application and I found this tutorial on how to implement the Three20 into my application: http://www.raywenderlich.com/1430/how-to-use-the-three20-photo-viewer.
I've a storyboard where the root is a Tab Bar Controller. This root controller has a relation with a View Controller with the class PhotoViewController from the above tutorial.
The last step in the tutorial is to add code to the AppDelegate, but in my case I added this code to the PhotoViewController:
#import "PhotoViewController.h"
#import "PhotoSet.h"
#implementation PhotoViewController
#synthesize photoSet = _photoSet;
- (void) viewDidLoad {
[[TTURLRequestQueue mainQueue] setMaxContentLength:0];
TTNavigator *navigator = [TTNavigator navigator];
UIWindow *window = [UIApplication sharedApplication].keyWindow;
navigator.window = window;
TTURLMap *map = navigator.URLMap;
[map from:#"tt://appPhotos" toSharedViewController:[PhotoViewController class]];
[navigator openURLAction:[TTURLAction actionWithURLPath:#"tt://appPhotos"]];
self.photoSource = [PhotoSet samplePhotoSet];
}
- (void) dealloc {
self.photoSet = nil;
}
#end
Here is a image of the result after tabbing the "Gallery" tab in the root tab controller:
Here is a image when I scroll in the view:
This is almost fine, but I have some issues:
When I tab the Gallery and the above view appear, there is no way back to the root tab controller. How can I add a back button?
When I swipe in the gallery, the text "Error" is displayed for a while until the image is fully loaded. Why?
When I tab "See All" it shows an list of all images. How can I change the background-color for the navigation bar in the top?
I think that MWPhotoBrowser has a nicer interface than EGOPhotoViewer (feels closer to the native Photos app).
MWPhotoBrowser is an implementation of a photo browser similar to the native Photos app in iOS. It can display one or more images by providing either UIImage objects, file paths to images on the device, or URLs to images online. The photo browser handles the downloading and caching of photos from the web seamlessly. Photos can be zoomed and panned, and optional (customisable) captions can be displayed. Works on iOS 3.2+. All strings are localisable so they can be used in apps that support multiple languages.
Better try EGOPhotoViewer.
Related
- (UIViewController *)activityViewController
I created a custom UIACtivity that returns a view controller that displays a popup. This allows the user to do some editing before performing the actual activity.
With ios below 8, my background with transparency that looks like an overlay works (I can see my game underneath) but after updating to ios8, the background becomes solid color gray. I checked the UIImageView displaying my overlay image with alpha and it is set to clear. Can someone tell me why the background suddenly becomes solid? I couldn't see the view of my game underneath anymore.
Here's my code:
- (IBAction)didPressShareButton:(id)sender
{
...
[_rootViewController presentViewController:[self getActivityViewController] animated:YES completion:nil];
...
}
The _rootViewController is the main view controller of my application.
The [self getActivityViewController] returns an instance of UIActivityViewController which includes my custom UIActivity for instagram
My InstagramUIActivity overrides this function to return a custom viewcontroller (see attached image)
- (UIViewController *)activityViewController
{
dismissalAC = [[InstagramDismissal alloc]init];
presentationAC = [[InstagramPresentation alloc]init];
instagramVC = [[InstagramViewController alloc]initWithInstagramPhoto:_instagramPhoto];
instagramVC.delegate = self;
if ([instagramVC respondsToSelector:#selector(setTransitioningDelegate:)]) {
instagramVC.transitioningDelegate = self;
}
return instagramVC;
}
dismissalAC and presentationAC are just objects that implement the UIViewControllerAnimatedTransitioning protocol so I could have my own transition animation.
When I return my custom view controller, it pops up but along with it is a view with white background. I don't know why.
try
instagramVC.modalPresentationStyle = UIModalPresentationOverFullScreen;
or
instagramVC.modalPresentationStyle = UIModalPresentationOverCurrentContext;
I encountered this problem in my apps too.
Since iOS 8, Apple forbids subclassing nor customizing the subviews of an UIActivityViewController.
If you did so on your app, the app shows an overlay over your view and an empty gray list without any buttons. In this case, you must kill your app to dismiss the UIActivityViewController.
To replace this behavior, I simply creating a view (either programmatically or from storyboard) with the same layout and you can make it appear from bottom of the screen (with an animation). Ask me some example code if needed.
I add webview and navigationbar inside my view controller .
Web view is display properly but when I am start to drag scroll vertically that webview and stop dragging, uiwebview reach in top.
In short, Scrolling is not working in vertically.
here is my code.
- (void)viewDidLoad
{
[super viewDidLoad];
web.delegate=self;
NSBundle *myAppBundle = [NSBundle bundleForClass:[self class]];
NSString *htmlFilePath = [myAppBundle pathForResource:#"infotext" ofType:#"htm"];
[web loadHTMLString:htmlFilePath baseURL:nil];
[self.view addSubview:web];
}
Here I take webview inside IB and set it outlet.
Either you have webview.userInteraction = NO which disables the scrolling in the webView or you have added the webview to the wrong view as a subview.
Try First adding this above your addSubview : web.userInteractionEnabled = YES;
If that doesn't work then you need to look at which viewController all this code is from. In order for this to work since you are using a UINavigationController, you need to make sure this code is happening in the RootViewController and the NavigationController as well as the RootViewController are wired up correctly.
It sounds like you just drug over a Navigation Bar from IB which won't really do what you are hoping for in this case so its probably likely that its causing your issues.
I have read that subclassing a UITabBarController is a non-recommended practice. However, how then is possible to implement lazy loading of the views of tab bar items?
I'm playing around with a standard app view hierarchy: In my main app delegate file (application:didFinishLaunchingWithOptions:) , I'm instantiating a custom subclass of UITabBarController with a 4 tab bar items / icons. I only need to load the first view of the first tab bar item - other views should be loaded lazily upon request. So, in application:didFinishLaunchingWithOptions:, I'm loading welcome view and pushing it into the first UINavigationController(1). The other tab bar items are empty UINavigationControllers - (2, 3, 4). Here is my custom subclass of UITabBarController that is also a delete of himself:
#interface MainUITabBarController : UITabBarController <UITabBarControllerDelegate> {
}
#end
#implementation MainUITabBarController
-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
UIImageView *image = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"TableViewBG.jpg"]] autorelease];
UIViewController *vc = [self.viewControllers objectAtIndex:item.tag];
vc.view = image;
}
#end
Currently, the view of the second tab bar item is just a UIViewController but I it will become a UINavigationController soon :)
So, back to the problem, what other (more apple-complaint) options would be to implement tab bar item action handling for lazy-loading?
If I understand your question correctly, by default TabbarController loads item's view in lazy mode. That is, unless you click on a certain item on tab bar, it won't be loaded.
You can check this by putting log on each view's viewdidload and see when it is getting called.
I have an app at the moment that when a button is pushed on the first screen does some work and makes a URL, and then does
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:currentURL]];
which launches Safari with my URL. I want instead to have a webview launch from here so the user can do some custom things with it. I am still having a hell of a time understanding MVC in iOS and need help. My project is minimal and consists of an AppDelegate.h/m and a ViewController.h/m, the.m of the view controller is where the function that does this Safari launch lives.
Can anyone help me understand how to do what I'm trying to d?
Thanks...
The simplest way is just to add a UIWebView when the button gets pressed. Add this method to your ViewController.m and have this be performed when the button gets pressed.
Programmatically:
//This method should get called when you want to add and load the web view
- (void)loadUIWebView
{
UIWebView *webView = [[UIWebView alloc] initWithFrame:self.view.bounds]; //Change self.view.bounds to a smaller CGRect if you don't want it to take up the whole screen
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:currentURL]]];
[self.view addSubview:webView];
[webView release];
}
Using Interface Builder:
1) Add a UIWebView object to your interface.
2) Set the "hidden" property to checked (in the "Attributes Inspector" window in Interface Builder). You'll keep it hidden until you want to show it.
3) Add the following code to your ViewController.h, below the other #property lines:
#property (nonatomic, retain) IBOutlet UIWebView *webView;
4) Add the following line below the #synthesize in your ViewController.m
#synthesize webView;
And add [webView release]; in the dealloc method.
5) Go back into IB and click on File's Owner, and connect the webView outlet to the webView you created.
6) Add the following method instead of the method I showed above (for the programmatic example):
//This method should get called when you want to add and load the web view
- (void)loadUIWebView
{
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:currentURL]]];
self.webView.hidden = NO;
}
You could set up an IBAction method to respond to the button press, but it sounds like you already have the button press working, so I wouldn't bother with that now.
As far as adding a button above the web view, you can either subclass web view and add the button there, or just have a separate button you define in your nib or programmatically and have that hide the webView to "get rid of it".
For adding UIWebView using Swift to your app just drag the WebView to your story board and then using an assistant editor connect WebView to ViewController.swift
And then Loading URL to WebView is very easy. Just create a WebView in your storyboard and then you can use the following code to load url.
let url = NSURL (string: "https://www.simplifiedios.net");
let request = NSURLRequest(URL: url!);
webView.loadRequest(request);
As simple as that only 3 lines of codes :)
Ref: UIWebView Example
Since this is the top result on Google, if you can use WKWebView instead of UIWebView, you should.
import WebKit
let webViewConfiguration = WKWebViewConfiguration()
let webView = WKWebView(frame: CGRect(), configuration: webViewConfiguration)
I have been coding and testing an app which uses a navigation controller, tab bar and table views together as shown in this tutorial video:
I have also coded a MapView page which shows custom annotations. This seems to work fine in every version of the simulator I have tried it on. This morning I have finally got the app running on my Ipod Touch which runs OS 3.1.3 - everything works as expected except the map does not seem to allow user interaction at all. I cannot tap on annotations, the current location or move and zoom at all.
I have been through all the settings in the Interface Builder for the mapview, and made sure that all the 'User Interaction', 'Allow Multitouch' boxes have been ticked. This doesn't seem to change anything.
Any help greatly appreciated.
The Mapview is put into the view as follows:
// Grab the maps view controller ready for loading
MapView *childController = [[MapView alloc] initWithNibName:#"MapView" bundle:nil];
childController.title = #"View on Map";
// Push the new view controller onto the stack
[self.navigationController pushViewController:childController animated:YES];
[childController release];
childController = nil;
I've also tried running the view in a modal view controller just to see what would happen. The view was shown and any interaction didnt seem to work - with the exception of a small section at the bottom where I made the view itself slightly shorter so it would fit in above the tab bar. This section seems to have another map underneath my view which DOES respond to user interaction. So there is a 1cm or so block which does move - my view seems to stay static on top of it, though.
The view underneath does not appear to have any annotations or the current user location.
Ok I've solved this one:
In the mapview.m file where I set up the view and load the annotations, within the viewDidLoad function I had the following code:
- (void)viewDidLoad {
// More code before this..
[mapView addAnnotations: eventPoints];
// This is causing the problems on the ipod touch.
// The view is added ON TOP of the first map..
//[self.view addSubview:mapView];
self.view = mapView;
// More code after this..
}
Where mapView is
IBOutlet MKMapView *mapView;
Adding a subview on top of the current view didn't want to work. Actually setting the view to be the new updated view with annotations seems to work fine. It's still strange that the simulator would work and not the device in the first place though.
Hope this helps someone.