Information not sending over to Apple Watch on viewDidLoad - ios

I have an iOS app that has a watchOS extension, both of which are build in Objective-C. The app needs to send over an array when it loads up (viewDidLoad) or appears (viewDidAppear:(BOOL)animated). When the app loads up, nothing happens, but if I somehow add a file to the app (either through the built-in adder or by importing one from my desktop or AirDrop), the watch app updates. Pressing the refresh button does not make the app work. However, once I add a file, it updates fine and starts updating perfectly. I'm not sure why this happens, but here is some code I used. I cut out some less useful code.
In viewDidLoad:
- (void)viewDidLoad
{
NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *appFolderPath = [path objectAtIndex:0];
NSString *inboxAppFolderPath = [appFolderPath stringByAppendingString:#"/Inbox"]; //changes the directory address to make it for the inbox
//move all files from inbox to documents root
//get to inbox directory
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *inboxContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[NSString stringWithFormat:inboxAppFolderPath,documentsDirectory] error:nil];
//move all the files over
for (int i = 0; i != [inboxContents count]; i++)
{
NSString *oldPath = [NSString stringWithFormat:#"%#/%#", inboxAppFolderPath, [inboxContents objectAtIndex:i]];
//NSLog(oldPath);
NSString *newPath = [NSString stringWithFormat:#"%#/%#", appFolderPath, [inboxContents objectAtIndex:i]];
//NSLog(newPath);
NSError* error;
[[NSFileManager defaultManager] moveItemAtPath:oldPath toPath:newPath error:&error];
NSLog(#"error: %#", error.localizedDescription);
}
//end of moving all files
//Turn every file inside the directory into an array
//add directory in case it doesn't already exist
if (![[NSFileManager defaultManager] fileExistsAtPath: inboxAppFolderPath])
{
[[NSFileManager defaultManager] createDirectoryAtPath: inboxAppFolderPath withIntermediateDirectories:NO attributes:nil error:nil];
NSLog(#"directory created");
}
//a bunch of NSPredicates go here to filter out the array
[self sendStuffToWatch];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self connectToWatch];
}
In -(void)connectToWatch, there is
-(void)connectToWatch
{
//set up WatchConnectivity session
if([WCSession isSupported])
{
self.watchSession = [WCSession defaultSession];
self.watchSession.delegate = self;
[self.watchSession activateSession];
if([WCSession defaultSession].paired){
NSLog(#"Watch session active");
}
else
{
NSLog(#"WATCH NOT CONNECTED");
}
}
}
In -(void)sendStuffToWatch
-(void)sendStuffToWatch
{
if(self.watchSession)
{
NSError *error;
NSDictionary *applicationDict = #{#"array":recipes};
[self.watchSession updateApplicationContext:applicationDict error:&error];
NSLog(#"sent info to watch");
}
}
In -(void)viewDidAppear:(BOOL)animated, there's only this
-(void)viewDidAppear:(BOOL)animated
{
[self sendStuffToWatch];
}
The code for the refresh button is
-(IBAction)Refresh:(id)sender
{
[recipeTable reloadData];
[self sendStuffToWatch];
[self viewDidLoad];
}

Your methods are all out of order. You want to first call super, then setup connectivity, filter the array, and then finally send the data to the watch.
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self connectToWatch];
// rest of code here to create recipe array
[self sendStuffToWatch];
Also, you shouldn't be calling viewDidLoad in your own code. It should only be called once, for you, not by you, when the view controller is first loaded into memory.
If you have code you want to rerun, then move it out of viewDidLoad into its own method, and just call that method.

Related

Threading loading images from a device to a tableView in swift

I can't find anything online about threading loading an image from a device and scrolling smoothly through a tableview. There is one on ray wen about this, but it doesn't really help me for my situation.
Does anybody have any advice or code which would help to allow a tableview to scroll smoothly and load images from the device's temporary directory?
i did exactly as mentioned at tutorial, but with modification for nsoperation subclass
this is methods for fetch
-(void) updateData
{
[self.pendingOperations.downloadQueue addOperationWithBlock:^{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *filePathes = [self recursiveRecordsForResourcesOfType:#[#"png", #"jpeg", #"jpg",#"pdf"] inDirectory:documentsDirectory];
#synchronized (self) {
self.documents = filePathes;
NSLog(#"documents count %#", #([self.documents count]));
}
dispatch_async(dispatch_get_main_queue(), ^(void){
//Run UI Updates
[self.delegate modelDidUpdate:self];
});
}];
}
- (NSArray *)recursiveRecordsForResourcesOfType:(NSArray *)types inDirectory:(NSString *)directoryPath{
NSMutableArray *filePaths = [[NSMutableArray alloc] init];
NSMutableDictionary *typesDic = [NSMutableDictionary dictionary];
for (NSString *type in types)
[typesDic setObject:type forKey:type];
// Enumerators are recursive
NSDirectoryEnumerator *enumerator = [[NSFileManager defaultManager] enumeratorAtPath:directoryPath];
NSString *filePath;
while ((filePath = [enumerator nextObject]) != nil){
// If we have the right type of file, add it to the list
// Make sure to prepend the directory path
if([typesDic objectForKey:[filePath pathExtension]]){
//[filePaths addObject:[directoryPath stringByAppendingPathComponent:filePath]];
CURFileRecord *record = [CURFileRecord new];
record.filePath =[directoryPath stringByAppendingPathComponent:filePath];
record.fileName = filePath;
[filePaths addObject:record];
}
}
return filePaths;
}
this is .m for subclass
- (void)main {
// 4
#autoreleasepool {
if (self.isCancelled)
return;
NSData *fileData = [[NSFileManager defaultManager] contentsAtPath:self.fileRecord.filePath];
// self.fileRecord.fileData = fileData;
if (self.isCancelled) {
fileData = nil;
return;
}
if (fileData) {
UIImage *newImage;
if ([[self.fileRecord.filePath pathExtension] isEqualToString:#"pdf"])
{
CGPDFDocumentRef doc = [CURDocumentViewerUtilities MyGetPDFDocumentRef:fileData];
newImage = [CURDocumentViewerUtilities buildThumbnailImage:doc withSize:CGSizeMake(64, 96)];
}
else
{
newImage = [CURDocumentViewerUtilities makePreviewImageFromData:fileData];
}
self.fileRecord.previewImage = newImage;
}
else {
self.fileRecord.failed = YES;
}
fileData = nil;
if (self.isCancelled)
return;
// 5
[(NSObject *)self.delegate performSelectorOnMainThread:#selector(imageDownloaderDidFinish:) withObject:self waitUntilDone:NO];
}
}
With update func i've fetched pathes to proccess, and nsoperation subclass loads images. Works fine with 2000 images in fullhd - smoothly and without any lugs

How can I update a UITableView from a dynamically downloaded text file?

I am filling a TableView from a text file. I want to enable the user to download an updated text file and replace the existing content of the TableView with the content of the downloaded file. I am able to download the file and replace the original file. If I close the application and open it again, it loads the updated file.
But the TableView doesn't change while the app is running. When I execute the method to load data from the file into the TableView, I can see, using NSLog, that the method is getting the original data from the file.
What am I doing incorrectly? How can I get the method to see the updated text file instead of the original text file?
Thanks.
#interface
#property (strong, nonatomic) NSArray *tableViewData;
#end
#implementation
/*
When user presses button, IBAction method
- downloads text file
- saves the downloaded file, replacing the original text file
- loads the text file into the TableView data (this is what doesn't work)
- sends a reload message to the TableView
*/
- (IBAction)buttonUpdateTextFile:(UIBarButtonItem *)sender
{
NSString *contentsOfTextFile = [self downloadTextFileFromURL:#"http://www.apple.com/index.html"];
[self saveContentsOfTextFile:contentsOfTextFile toFile:#"tableViewData.txt"];
[self loadDataFromFileWithFileName:#"tableViewData" fileExtension:#"txt"];
[self.tableView reloadData];
}
- (NSString *)downloadTextFileFromURL:(NSString *)textFileURLstring
{
NSURL *textFileURL = [NSURL URLWithString:textFileURLstring];
NSError *error = nil;
NSString *contentsOfTextFile = [NSString stringWithContentsOfURL:textFileURL encoding:NSUTF8StringEncoding error:&error];
return contentsOfTextFile;
}
- (void)saveContentsOfTextFile:(NSString *)contentsOfTextFile toFile:(NSString *)fileName
{
NSString *pathName = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fileNameWithPath = [pathName stringByAppendingPathComponent:fileName];
if (![[NSFileManager defaultManager] fileExistsAtPath:fileNameWithPath]) {
[[NSFileManager defaultManager] createFileAtPath:fileNameWithPath contents:nil attributes:nil];
[[contentsOfTextFile dataUsingEncoding:NSUTF8StringEncoding] writeToFile:fileNameWithPath atomically:NO];
}
- (void)loadDataFromFileWithFileName:(NSString *)fileName fileExtension:(NSString *)fileExtension
{
NSString *path = [[NSBundle mainBundle] pathForResource:fileName
ofType:fileExtension];
NSString *content = [NSString stringWithContentsOfFile:path
encoding:NSUTF8StringEncoding
error:NULL];
NSString *remainingText = [content mutableCopy];
NSMutableArray *data = [[NSMutableArray alloc] init];
NSRange *substringRange;
while (![remainingText isEqualToString:#""]) {
substringRange = [remainingText rangeOfString:#"/n"];
if (substringRange.location == NSNotFound)
{
currentLine = remainingText;
remainingText = #"";
} else {
substringRange.length = substringRange.location;
substringRange.location = 0;
currentLine = [[remainingText substringWithRange:substringRange] mutableCopy];
// - strip line from remainingText
substringRange.location = substringRange.length + 1;
substringRange.length = remainingText.length - substringRange.length - 1;
remainingText = [[remainingText substringWithRange:substringRange] mutableCopy];
}
[data addObject:currentLine];
}
self.tableViewData = [data copy];
}
I think
self.tableViewData = [data copy];
may be the problem.
I would make data a "private" property of the class. Only init once and then manually add and remove objects to it. Don't use copy.

Unable to save table data via NSCoding

I have an array of Objects (containing an item name and a creation date) used to display table data. I want to save this array using NSCoding protocol. I call my saveDataToDisk method every time a "submit" button is pressed to submit a new table entry. However, my app crashes upon hitting submit. This is my first time learning how to save app data and I looked a several tutorials and my form seems to be the same. I also looked for several days on the internet and couldn't find a solution. What is wrong?
Here are my methods:
Decoder Method:
- (id)initWithCoder:(NSCoder *)decoder {
self = [super initWithCoder:decoder];
if (!self) {
return nil;
}
self.itemArray = [decoder decodeObjectForKey:#"itemArray"];
return self;
}
Encoder Method:
- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:self.itemArray forKey:#"itemArray"];
}
Path Finder Method:
- (NSString*) pathForDataFile
{
NSFileManager * fileManager = [NSFileManager defaultManager];
NSString *documentsPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"appData"];
if([fileManager fileExistsAtPath:filePath] == NO)
{
[fileManager createDirectoryAtPath:filePath withIntermediateDirectories:NO attributes:nil error:nil];
}
NSString *fileName = #"Budgetlist.appData";
return [filePath stringByAppendingPathComponent: fileName];
}
Save Data Method:
- (void) saveDataToDisk
{
NSString * path = [self pathForDataFile];
NSMutableDictionary * rootObject;
rootObject = [NSMutableDictionary dictionary];
[rootObject setValue: [self itemArray] forKey:#"itemArray"];
[NSKeyedArchiver archiveRootObject: rootObject toFile: path];
}
Load Data Method:
- (void) loadDataFromDisk
{
NSString * path = [self pathForDataFile];
NSDictionary * rootObject;
rootObject = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
[self setItemArray: [rootObject valueForKey:#"itemArray"]];
}
My Button:
- (IBAction)submitButton:(id)sender {
if (self.textField.text.length > 0 && [self.textField.text floatValue]>0) {
self.item = [[Data alloc] init];
self.item.itemName = self.textField.text;
[self.itemArray addObject:self.item];
[self.tableView reloadData];
[self saveDataToDisk];
}
}
You are trying to save an NSArray with custom objects.
Your objects must implement NSCoding protocol as well.
Implement those:
- (id)initWithCoder:(NSCoder *)decoder
- (void)encodeWithCoder:(NSCoder *)encoder
in your "Data" class.
NSArray is going through all objects and call those methods for each object inisde an array

How do I find the filepath for my plist?

I am trying to load a plist into a UITableView. I am new to working with pLists and tableViews, but I know i need to use something along these lines. My problem is though that where "filePath" is, i don't actually know how to put in my pList?
list = [NSArray arrayWithContentsOfFile:filePath];
Any other suggestions with code how to to do this other than getting the file path would be greatly appreciated. Such as do i need to put anything in my .h file? Thanks.
Assuming you've already added a .plist to your project, I've created a class you can add to your project that will get and save information to a given .plist. It's a functioning singleton, so you can call it from anywhere.
First, create a new NSObject file called "GetAndSaveData", then post the following code into .h:
#interface GetAndSaveData : NSObject{
NSMutableDictionary *allData;
NSString *path;
}
+(GetAndSaveData *)sharedGetAndSave;
-(NSMutableArray *)arrayForKey:(NSString *)dataList;
-(void)setData:(NSMutableArray *)array ForKey:(NSString *)dataList;
#end
and the following code into .m:
static GetAndSaveData *sharedGetAndSave;
#implementation GetAndSaveData
-(id)init{
self = [super init];
NSError *error;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //1
NSString *documentsDirectory = [paths objectAtIndex:0];
path = [documentsDirectory stringByAppendingPathComponent:#"data.plist"];
if (![fileManager fileExistsAtPath: path])
{
NSString *bundle = [[NSBundle mainBundle] pathForResource:#"data" ofType:#"plist"];
[fileManager copyItemAtPath:bundle toPath: path error:&error];
}
allData = [[NSMutableDictionary alloc] initWithContentsOfFile: path];
return self;
}
-(NSMutableArray *)arrayForKey:(NSString *)dataList{
NSMutableArray *array = [allData objectForKey:dataList];
return array;
}
-(void)setData:(NSMutableArray *)array ForKey:(NSString *)dataList{
[allData setObject:array forKey:dataList];
[allData writeToFile:path atomically:YES];
if(![allData writeToFile:path atomically:YES])
{
NSLog(#".plist writing was unsuccessful");
}
}
+(GetAndSaveData *)sharedGetAndSave{
if (!sharedGetAndSave) {
sharedGetAndSave = [[GetAndSaveData alloc] init];
}
return sharedGetAndSave;
}
+(id)allocWithZone:(NSZone *)zone{
if (!sharedGetAndSave) {
sharedGetAndSave = [super allocWithZone:zone];
return sharedGetAndSave;
} else {
return nil;
}
}
-(id)copyWithZone:(NSZone *)zone{
return self;
}
#end
You can change the functions up to get and save different types of data. You can use it in view controllers by importing the .h file, and doing the following:
myMutableArray = [[GetAndSaveData sharedGetAndSave]arrayForKey:myKey];

Using a class method to create an NSArray

Once more I come to the Internet, hat in hand. :)
I'm attempting to use a class method to return a populated array containing other arrays as elements:
.h:
#interface NetworkData : NSObject {
}
+(NSString*) getCachePath:(NSString*) filename;
+(void) writeToFile:(NSString*)text withFilename:(NSString*) filePath;
+(NSString*) readFromFile:(NSString*) filePath;
+(void) loadParkData:(NSString*) filename;
+(NSArray*) generateColumnArray:(int) column type:(NSString*) type filename:(NSString*) filename;
#end
.m:
#import "NetworkData.h"
#import "JSON.h"
#import "Utility.h"
#implementation NetworkData
+(NSString*) getCachePath:(NSString*) filename {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *cachePath = [NSString stringWithFormat:#"%#/%#", [paths objectAtIndex:0], filename];
[paths release];
return cachePath;
}
+(void) writeToFile:(NSString*)text withFilename:(NSString*) filename {
NSMutableArray *array = [[NSArray alloc] init];
[array addObject:text];
[array writeToFile:filename atomically:YES];
[array release];
}
+(NSString*) readFromFile:(NSString*) filename {
NSFileManager* filemgr = [[NSFileManager alloc] init];
NSData* buffer = [filemgr contentsAtPath:filename];
NSString* data = [[NSString alloc] initWithData:buffer encoding:NSUTF8StringEncoding];
[buffer release];
[filemgr release];
return data;
}
+(void) loadParkData:(NSString*) filename {
NSString *filePath = [self getCachePath:filename];
NSURL *url = [NSURL URLWithString:#"http://my.appserver.com"];
NSData *urlData = [NSData dataWithContentsOfURL:url];
[urlData writeToFile:filePath atomically:YES];
}
+(NSArray*) generateColumnArray:(int) column type:(NSString*) type filename:(NSString*) filename {
// NSLog(#"generateColumnArray called: %u %# %#", column, type, filename);
// productArray = [[NSMutableArray alloc] init];
// NSString *filePath = [self getCachePath:filename];
// NSString *fileContent = [self readFromFile:filePath];
// NSString *jsonString = [[NSString alloc] initWithString:fileContent];
// NSDictionary *results = [jsonString JSONValue];
// NSArray *eventsArray = [results objectForKey:type];
// NSInteger* eventsArrayCount = [eventsArray count];
// NSInteger* a;
// for (a = 0; a < eventsArrayCount; a++) {
// NSArray *eventsColSrc = [eventsArray objectAtIndex:a];
// NSArray *blockArray = [eventsColSrc objectAtIndex:column];
// [productArray addObject:blockArray];
// [blockArray release];
// }
// [eventsArray release];
// [results release];
// [jsonString release];
// [fileContent release];
// [filePath release];
// [a release];
// [eventsArrayCount release];
// return productArray;
}
-(void)dealloc {
[super dealloc];
}
#end
.. and the call:
NSArray* dataColumn = [NetworkData generateColumnArray:0 type:#"eventtype_a" filename:#"data.json"];
The code within the method works (isn't pretty, I know - noob at work). It's essentially moot because just calling it (with no active code, as shown) causes the app to quit before the splash screen reveals anything else.
I'm betting this is a headslapper - many thanks for any knowledge you can drop.
If your app crashes, there's very likely a message in the console that tells you why. It's always helpful to include that message when seeking help.
One obvious problem is that your +generateColumnArray... method is supposed to return a pointer to an NSArray, but with all the code in the method commented out, it's not returning anything, and who-knows-what is being assigned to dataColumn. Try just adding a return nil; to the end of the method and see if that fixes the crash. Again, though, look at the error message to see specifically why the code is crashing, and that will lead you to the solution.
Well, you're not returning a valid value from your commented out code. What do you use 'dataColumn' for next? Running under the debugger should point you right to the issue, no?

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