I need to view data from NSMutableArray in NSTableView. There is the code:
- (IBAction)StartReconstruction:(id)sender
{
NSMutableArray *ArrayOfFinals = [[NSMutableArray alloc] initWithObjects:nil]; //Array of list with final images
NSString *FinalPicture;
NSString *PicNum;
int FromLine = [TextFieldFrom intValue]; //read number of start line
int ToLine = [TextFieldTo intValue]; //read number of finish line
int RecLine;
for (RecLine = FromLine; RecLine < ToLine; RecLine++) //reconstruct from line to line
{
//Start(RecLine); //start reconstruction
//Create path of final image
FinalPicture = #"FIN/final";
PicNum = [NSString stringWithFormat: #"%d", RecLine];
FinalPicture = [FinalPicture stringByAppendingString:PicNum];
FinalPicture = [FinalPicture stringByAppendingString:#".bmp"];
[ArrayOfFinals addObject:FinalPicture]; // add path to array
}
NSBeep(); //make some noise
}
I need to set ArrayOfFinals as data source for my tableview in my app. I'm noob in cocoa, and I don't know where I need to make connections :(
I saw tutorial on youtube, but it didn't hepl me.
SO is really not a place for step-by-step tutorials.
But on this subject there're many you can find online. Personally, I've found apple tutorial very informative (even if a bit verbose).
You can't really use an array directly as a data source, but you can use an NSArrayController in between and then use bindings to hook them up.
You won't need to write a single line of code for a basic set up.
There are plenty of step-by-step tutorials on the net for this.
Related
I am trying to get info on all the albums/photos using the PHPhotoLibrary. I barely know objective C, and i've looked at some tutorial/sample but couldn't find everything that I needed.
Here is a link to the sample code I based my code on.
https://developer.apple.com/library/ios/samplecode/UsingPhotosFramework/Introduction/Intro.html#//apple_ref/doc/uid/TP40014575-Intro-DontLinkElementID_2
So far I was able to get the albums name and identifier. And I am getting a list of photos, I am able to get their identifier as well, but not the filename. But if I put a break point in my fonction and look at my PHAsset pointer values, I can see the filename there (inside _filename), but if I try to call the variable with the filename in it, the variable does not exist.
So if anyone can provide a sample code to get all info on albums/photos/thumbnail that would be awesome. Or just getting the filename would be a good help.
Here is the code I have tried so far:
-(void)awakeFromNib{
NSMutableArray *allPhotos = self.getAllPhotos;
for (int x = 0; x < allPhotos.count; x ++)
{
PHAsset *photo = [self getPhotoAtIndex:x];
PHAssetSourceType source = photo.sourceType;
NSString *id = photo.localIdentifier;
NSString *description = photo.description;
NSUInteger height = photo.pixelHeight;
NSUInteger width = photo.pixelWidth;
NSLog(#"Test photo info");
}
}
-(PHAsset*) getPhotoAtIndex:(NSInteger) index
{
return [self.getAllPhotos objectAtIndex:index];
}
-(NSMutableArray *) getAllPhotos
{
NSMutableArray *photos = [[NSMutableArray alloc] init];
PHFetchOptions *allPhotosOptions = [[PHFetchOptions alloc] init];
allPhotosOptions.sortDescriptors = #[[NSSortDescriptor sortDescriptorWithKey:#"creationDate" ascending:YES]];
PHFetchResult *allPhotos = [PHAsset fetchAssetsWithOptions:allPhotosOptions];
PHFetchResult *fetchResult = #[allPhotos][0];
for (int x = 0; x < fetchResult.count; x ++) {
PHAsset *asset = fetchResult[x];
photos[x] = asset;
}
return photos;
}
As you can see, I can get the image height and width, its id, but cannot get the url to it.
I have found a way to get the url of my photo.
-(void)getImageURL:(PHAsset*) asset
{
PHContentEditingInputRequestOptions *options = [[PHContentEditingInputRequestOptions alloc] init];
[options setCanHandleAdjustmentData:^BOOL(PHAdjustmentData *adjustmentData) {
return [adjustmentData.formatIdentifier isEqualToString:AdjustmentFormatIdentifier] && [adjustmentData.formatVersion isEqualToString:#"1.0"];
}];
[asset requestContentEditingInputWithOptions:options completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info)
{
NSURL* url = contentEditingInput.fullSizeImageURL;
}];
}
Filenames in the Photos library are an implementation detail and subject to change. There are various private API for discovering them (or ways to use valueForKey or other public introspection APIs to find where they're hidden), they aren't something to be relied upon. In particular, an asset that's been edited is likely to have a different filename than the original.
What do you need a filename/URL for? If you're just uniquely identifying the asset across launches of your app, use localIdentifier. If you're showing it to the user... why? Something like IMG_0234.jpg vs IMG_5672.jpg has little meaning to the average user.
To fetch the assets in a specific album, use fetchAssetsInAssetCollection:options:. To fetch the album(s) containing a specific asset, use fetchAssetCollectionsContainingAsset:withType:options:. To discover the list(s) of albums, use other APIs on PHAssetCollection and its superclass PHCollection.
Hi there i have image views in my application to change pictures in them. but their name like imageview1, imageview2, and so.. i create a string which like:
`("imageview%i", number)`
so my string is imageview1 for example. and i need to change
self."**mystring**".image = [uiimage ...]
I looked key-value coding but i couldn't get it exactly. i searched the forum and i can't get anything either. what could i do to resolve this. i think i must do an array with my uiimageviews inside of it. than compare their name with my string (i didn't know how can i get property names as nsstring). then return that image view. Please help.
If you want to do that in runtime, either hack your way using selectors or use tags on your UIImageViews. They are not really good programming concepts, but they work. Examples:
-(void)usingSelectors{
for(int i=0; i < 4; i++){
NSString* propName = [NSString stringWithFormat:#"imageview%d", i];
UIImageView* imageView = [self performSelector:NSSelectorFromString(propName)];
[imageView setImage:/*your image*/];
}
}
-(void)usingTags{
for(int i=0; i < 4; i++){
UIImageView* imageView = [self.view viewWithTag:i];
[imageView setImage:/*your image*/];
}
}
If you want to do that in compile time you'll have to use preprocessor macros, but I don't think that's your case.
I'm trying to make a game with 2 views, the first view has buttons which segues to another view. Depending on the segue identifier, it loads an image which the player has to guess.
I also have a an array which lists hints for the 4 images.
With the array, i made a button which shows the hints on the view, but the problem I have right now is that I don't know how to set the correct array to the image/puzzle.
A code that works right now is this:
if ([self.thePuzzle.name isEqual: #"lion"])
{
NSArray *hints = [lines[0] componentsSeparatedByString:#" "];
self.hintLabel.text = hints[0];
}
But after adding another line for the second image/puzzle, the app crashes.
2nd UPDATE: code that crashes
After entering this code
if ([self.thePuzzle.name isEqual: #"penguin"])
{
NSArray *hints = [lines[1] componentsSeparatedByString:#" "];
self.hintLabel.text = hints[1];
}
The hint button works for the 1st code, which has the lion picture, while the second part of the code, for the penguin pic, crashes when the Hint button is pressed.
3rd Update: Additional information
I made xcode access a file from the internet which contained the words for my array.
This is how i coded it.
[super viewDidLoad];
// Do any additional setup after loading the view.
self.imageView.image = [UIImage imageNamed:self.thePuzzle.imgFileName];
NSString *urlString = #"http://m.uploadedit.com/b032/1395295852132.txt";
NSString *contents = [TextFileManager readStringFromURL:urlString];
//parse contents
lines = [contents componentsSeparatedByString:#"\n"];
for( int i = 0; i < lines.count; i++)
{
NSString *line = lines[i];
NSLog(#"%d: %#", i, line);
}
There are lots of examples on this site about adding to NSMutableArray and I have looked at many but I still don't either understand (highly possible) or am missing something fundamental.
I am trying to add to an NSMutableArray via a for loop. I want to keep track of button x,y coordinate position using the button tag as key/index so I can change a button as a user clicks it. This is all without IB.
My init is as follow:
self.tmpXpos = [[NSMutableArray alloc] init];
self.tmpYpos = [[NSMutableArray alloc] init];
[self.tmpXpos insertObject:[NSNull null] atIndex:0];
[self.tmpYpos insertObject:[NSNull null] atIndex:0];
**I added these after reading about 'creating' the array and populating it with null.
In the loop:
NSUInteger btag = button.tag; //NSUInterger as per help
>>NSNumber *xNumber = [NSNumber numberWithInteger:[self xpos]]; // NSNumber as an Object wrapper
>>NSNumber *yNumber = [NSNumber numberWithInteger:[self ypos]];
>>[self.tmpXpos insertObject:xNumber atIndex:btag];
>>[self.tmpYpos insertObject:yNumber atIndex:btag];
NSLog(#"%d, %#, %#",btag,xNumber,yNumber);
The log entries look ok:
2,64,0
3,128,0
etc for each button to be added to the screen.
During debugging - the tmpXpos and tmpYpos listed as " 0 Objects " under self.
I retrieve the information thusly:
NSUInteger tmpSt = [self.sTags integerValue];
NSNumber *tmpX = [self.tmpXpos objectAtIndex:tmpSt];
NSNumber *tmpY = [self.tmpYpos objectAtIndex:tmpSt];
int tmpPositionX = [tmpX intValue];
int tmpPositionY = [tmpY intValue];
NSLog(#"%d, %d",tmpPositionX, tmpPositionY);
NSLog yields 0, 0
I do appreciate any guidance or questions you folks might have as this site's 'sanity checks' have saved my bacon in the past.
I am ignoring memory leaks as of yet, but they are in the back of my mind. No worries there.
Ironically, I have a couple of other arrays that work just fine, but the exception is that they are not populated via a loop.
Lastly, the code works fine as the button at location 0,0 does change as per design, LOL, but not for any other location.
Thanks again!
Neil
I think your problem is that you are creating the NSNumbers with the method numberWithInteger, when an NSUInteger is actually an unsigned long. So try
xNumber = [NSNumber numberWithUnsignedLong:[self xpos]];
Trees for the forest answer. I wanted to populate an array with a quantity, however, the array expects that quantity to be in numerical sequence. My data didn't have any 'gaps' but wasn't in sequence either; I.E., 1,2,3,6,7,12 etc. So, as user397313 helped me see, NSDictionary is the way to go with that kind of datum.
a big noob needs help understanding things.
I have three UIViews stored inside a NSMutableArray
lanes = [[NSMutableArray arrayWithCapacity:3] retain];
- (void)registerLane:(Lane*)lane {
NSLog (#"registering lane:%i",lane);
[lanes addObject:lane];
}
in the NSLog I see: registering lane:89183264
The value displayed in the NSLog (89183264) is what I am after.
I'd like to be able to save that number in a variable to be able to reuse it elsewhere in the code.
The closest I could come up with was this:
NSString *lane0 = [lanes objectAtIndex:0];
NSString *description0 = [lane0 description];
NSLog (#"description0:%#",description0);
The problem is that description0 gets the whole UIView object, not just the single number (dec 89183264 is hex 0x550d420)
description0's content:
description0:<Lane: 0x550d420; frame = (127 0; 66 460); alpha = 0.5; opaque = NO; autoresize = RM+BM; tag = 2; layer = <CALayer: 0x550d350>>
what I don't get is why I get the correct decimal value with with NSLog so easily, but seem to be unable to get it out of the NSMutableArray any other way. I am sure I am missing some "basic knowledge" here, and I would appreciate if someone could take the time and explain what's going on here so I can finally move on. it's been a long day studying.
why can't I save the 89183264 number easily with something like:
NSInteger * mylane = lane.id;
or
NSInteger * mylane = lane;
thank you all
I'm really confused as to why you want to save the memory location of the view? Because that's what your '89183264' number is. It's the location of the pointer. When you are calling:
NSLog (#"registering lane:%i",lane);
...do you get what's actually being printed out there? What the number that's being printed means?
It seems like a really bad idea, especially when if you're subclassing UIView you've already got a lovely .tag property which you can assign an int of your choosing.
You're making life infinitely more complex than it needs to be. Just use a pointer. Say I have an array containing lots of UIViews:
UIView *viewToCompare = [myArray objectAtIndex:3];
for (id object in myArray) {
if (object == viewToCompare) {
NSLog(#"Found it!");
}
}
That does what you're trying to do - it compares two pointers - and doesn't need any faffing around with ints, etc.