I have used Three20 and created thumbnail photo view using TTThumbViewController. I have successfully displayed the images in thumbnail view. Now I want to add more images from the server,so I need a "load more " button at the bottom of the view ,or when the page scrolls to the bottom,it will load more images automaticly.
Thank you very much!
Try this in your Photosource class
- (void)load:(TTURLRequestCachePolicy)cachePolicy more:(BOOL)more {
if (more) {
page++;
}
//http://www.theblacksheeponline.com/partypics.php?page=2
NSString *Page = [NSString stringWithFormat:#"%lu", (unsigned long)page];
NSString *url = [#"http:/.......pics.php?page=" stringByAppendingString:Page];
NSLog(#"ALPhotoSource url: %#", url);
TTURLRequest* request = [TTURLRequest requestWithURL:url delegate:self];
request.cachePolicy = cachePolicy;
// sets the response
request.response = responseProcessor;
request.httpMethod = #"GET";
// Dispatch the request.
[request send];
}
Hope this Helps!
Related
I'm no longer able to render collectionview cells after using data from Cloudkit via CKAssets. I was previously using images loaded in a folder on my desktop just for initial testing. I'm now using Cloudkit and I've created some test records via the CK dashboard using those same images. I was successfully able to query the CK database and retrieve the expected records. I then changed my code to populate the model data for the cells to use the CK data. That data previously came from the images retrieved locally. I can see from logging that I am getting the data from CK successfully, including the images. I can also see from logging that my custom CV cells are no longer getting initialed. From what I can tell, my code looks good based on examples I've seen online.
Can anyone help me with this? Thank you!
Designated initializer in the model...
- (instancetype)initImagesForSelection:(NSString *)selectionType {
self = [super init];
if (self) {
CKDatabase *publicDatabase = [[CKContainer defaultContainer] publicCloudDatabase];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"ImageDescription = 'description'"];
CKQuery *query = [[CKQuery alloc] initWithRecordType:#"ImageData" predicate:predicate];
[publicDatabase performQuery:query inZoneWithID:nil completionHandler:^(NSArray *results, NSError *error) {
// handle the error
if (error) {
NSLog(#"Error: there was an error querying the cloud... %#", error);
} else {
// any results?
if ([results count] > 0) {
NSLog(#"Success querying the cloud for %lu results!!!", (unsigned long)[results count]);
for (CKRecord *record in results) {
ImageData *imageData = [[ImageData alloc] init];
CKAsset *imageAsset = record[#"Image"];
imageData.imageURL = imageAsset.fileURL;
NSLog(#"asset URL: %#", imageData.imageURL);
imageData.imageName = record[#"ImageName"];
//imageData.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:imageAsset.fileURL]];
imageData.image = [UIImage imageWithContentsOfFile:imageAsset.fileURL.path];
NSLog(#"image size height:%f, width:%f", imageData.image.size.height, imageData.image.size.width);
[self.imageDataArray addObject:imageData];
}
NSLog(#"imageDataArray size %lu", (unsigned long)[self.imageDataArray count]);
}
}
}];
}
return self;
}
Collectionview viewcontroller which worked perfectly before pulling the data from Cloudkit...
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell"; // string value identifier for cell reuse
ImageViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
NSLog(#"cellForItemAtIndexPath: section:%ld row:%ld", (long)indexPath.section, (long)indexPath.row);
cell.layer.borderWidth = 1.0;
cell.layer.borderColor = [UIColor grayColor].CGColor;
ImageData *imageData = [self.imageLoadManager imageDataForCell:indexPath.row];
cell.imageView.image = imageData.image;
cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
return cell;
}
Ok, I figured this out. My code was actually working. The collectionview was not displaying due to a multithreading/asynchronous download issue with the data from cloudkit. I hit the camera button to take a pic, which refreshed the CV and everything in the CV appeared. I just need to use multithreading so things start rendering while the images are downloading.
I am trying to make master-detail view with generic webview in detail where the URL changes with selection of button in master view controller. Obviously I'm a novice and I need help!
in master view mfile I send through button like this:
-(IBAction)myButton1:(UIButton *) sender {
[self.detailVC location:#"http://google.com"];
}
-(IBAction)myButton2:(UIButton *) sender {
[self.detailVC location:#"http://yelp.com"];
}
in detail view mfile I have:
-(void)location(NSString *)myLocation{
_theLocation = myLocation;
}
-(void) viewDidLoad {
[super viewDidLoad];
NSURL *videoURL = [NSURL URLWithString:self.theLocation];
NSURLRequest *request = [NSURL Request requestWithURL:videoURL];
[self.webview loadRequest:request];
}
I am getting no build errors, but none of the URL's are loading. Please help!
You should know - (void)viewDidLoad Called after the controller’s view is loaded into memory , in your issue, it seems the self.detailVC is always alive in memory, that should not call viewDidLoad.
you can update the web view in - (void)setLocation(NSString *)myLocation directly:
- (void)setLocation(NSString *)myLocation
{
_location = myLocation;
NSURL *videoURL = [NSURL URLWithString:self.location];
NSURLRequest *request = [NSURL Request requestWithURL:videoURL];
[self.webview loadRequest:request];
}
I have a special URL that returns an image in a browser. I'd like to put this special image into a UIImage object. However, in my code sample below, it seems that the data returned is not an image.
The browser seems to know about the image, how can I get to the image?
Yes, I need get this image via the proxify proxy server to solve an issue we have.
Here is the sample code.
-(UIImage*)retrieveMap
{
NSString* proxifiedGoogleMapURL = #"http://proxify.com/p/011010A1000100/687474703a2f2f6d6170732e676f6f676c652e636f6d2f6d6170732f6170692f7374617469636d61703f63656e7465723d34312e3031343130312c2d3130342e393738333333267a6f6f6d3d362673697a653d35303678353036267363616c653d32266d6170747970653d726f61647326666f726d61743d706e672673656e736f723d66616c7365";
NSURLRequest * firstRequest = [NSURLRequest requestWithURL:[NSURL URLWithString: proxifiedGoogleMapURL]];
NSURLResponse * firstResponse = nil;
NSError * firstError = nil;
NSData* firstData = [NSURLConnection sendSynchronousRequest:firstRequest returningResponse:&firstResponse error:&firstError];
UIImage* dataAsImage = [UIImage imageWithData:firstData];
if(firstError != nil || dataAsImage == nil)
{
NSLog(#"Failed in retrieving the map");
}
else
{
NSLog(#"Succeeded in retrieving the map");
}
return dataAsImage;
}
I've spotted a few problems:
You should test firstError != nil before you try to convert to an UIImage. Testing it after kind of makes it useless.
I've tried to access that URL you posted and I got an error saying it is available only to users logged in. In the browser it might work for you since you are probably logged in, but the iphone is not and you get that HTML from proxify
To see the response you get, before creating the image convert it to NSString and display it to the console:
NSLog(#"Response from server: %#", [[NSString alloc] initWithData:firstData encoding:NSUTF8StringEncoding]
I'm trying to get a screenshot of a MKMapView.
and I'm using the following code:
UIGraphicsBeginImageContext(myMapView.frame.size);
[myMapView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenShot=UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return screenShot;
And I'm getting and almost blank image with the map current location icon and a Google logo in it.
What could be causing that?
I should tell you that myMapView is actually on another viewController's view but since I'm getting the blue spot showing the location and the google logo I assume the reference I have is the correct one.
Thank you.
iOS 7 introduced a new method to generate screenshots of a MKMapView. It is now possible to use the new MKMapSnapshot API as follows:
MKMapView *mapView = [..your mapview..]
MKMapSnapshotOptions *options = [[MKMapSnapshotOptions alloc]init];
options.region = mapView.region;
options.mapType = MKMapTypeStandard;
options.showsBuildings = NO;
options.showsPointsOfInterest = NO;
options.size = CGSizeMake(1000, 500);
MKMapSnapshotter *snapshotter = [[MKMapSnapshotter alloc]initWithOptions:options];
[snapshotter startWithQueue:dispatch_get_main_queue() completionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
if( error ) {
NSLog( #"An error occurred: %#", error );
} else {
[UIImagePNGRepresentation( snapshot.image ) writeToFile:#"/Users/<yourAccountName>/map.png" atomically:YES];
}
}];
Currently all overlays and annotations are not rendered. You have to render them afterwards onto the resulting snapshot image yourself. The provided MKMapSnapshot object has a handy helper method to do the mapping between coordinates and points:
CGPoint point = [snapshot pointForCoordinate:locationCoordinate2D];
As mentioned here, you can try this
- (UIImage*) renderToImage
{
UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 0.0);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
Im trying to implement your implementation to my project as a button called 'Gallery" but receive an error when trying to run the project.
My implementation file looks like this.
-(IBAction) gallery{
NSMutableArray *photos = [[NSMutableArray alloc] init];
MWPhoto *photo;
{
photo = [MWPhoto photoWithFilePath:[[NSBundle mainBundle] pathForResource:#"fans1" ofType:#"jpg"]];
photo.caption = #"My fans 1";
[photos addObject:photo];
photo = [MWPhoto photoWithFilePath:[[NSBundle mainBundle] pathForResource:#"fans2" ofType:#"jpg"]];
photo.caption = #"My fans 2";
[photos addObject:photo];
photo = [MWPhoto photoWithFilePath:[[NSBundle mainBundle] pathForResource:#"fans3" ofType:#"jpg"]];
photo.caption = #"Fans3";
[photos addObject:photo];
photo = [MWPhoto photoWithFilePath:[[NSBundle mainBundle] pathForResource:#"fans4" ofType:#"jpg"]];
photo.caption = #"Fans4";
[photos addObject:photo];
}
self.photos = photos;
// Create browser
MWPhotoBrowser *browser = [[MWPhotoBrowser alloc] initWithDelegate:self];
browser.displayActionButton = YES;
//browser.wantsFullScreenLayout = NO;
//[browser setInitialPageIndex:2];
// Show
if (_segmentedControl.selectedSegmentIndex == 0) {
// Push
[self.navigationController pushViewController:browser animated:YES];
} else {
// Modal
UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:browser];
nc.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:nc animated:YES];
}
}
#pragma mark - MWPhotoBrowserDelegate
- (NSUInteger)numberOfPhotosInPhotoBrowser:(MWPhotoBrowser *)photoBrowser {
return _photos.count;
}
- (MWPhoto *)photoBrowser:(MWPhotoBrowser *)photoBrowser photoAtIndex: (NSUInteger)index {
if (index < _photos.count)
return [_photos objectAtIndex:index];
return nil;
}
When I run the project but the image gallery is not displayed. Im fairly new to ioS development.If you can please point me in the right direction i will deeply appreciate it. The main goal is to have the image gallery displayed when the user touches the Gallery button.
I copied and edited the code from the MWPhotoBrowser Demo Project File I don't receive any errors but I can't get the gallery to appear once button is touched. (BTW I assigned the IBACTION to the buttons). If there is another source code or alternative Framework I can use please advise. Thanks!
Some Ideas:
1) try using 'initWithPhotos'.
2) put a breakpoint at the place you are pushing, check that the push is called.
3) check that the navigationController is not null (0x0) in debugging.
4) remember to release 'browser'.