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  • Setting up layout/events on iPhone

    - by Mohit Deshpande
    I am using Open Source toolchain to compile my iPhone apps. So I have no Interface Builder or XCode. How would I setup the layout of widgets like UIButton, UITextView, etc. Also, how would I add an event handler to those UI widgets? Please remember that I don't have Interface Builder or XCode.

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  • Would a pointer to a pointer to nil match against NULL?

    - by dontWatchMyProfile
    Example: A validation method contains this check to see if an NSError object shall be created or not: - (BOOL)validateCompanyName:(NSString *)newName error:(NSError **)outError { if (outError != NULL) { // do it... Now I pass an NSError object, like this: NSError *error = nil; BOOL ok = [self validateCompanyName:@"Apple" error:&error]; I'm not sure if this matches the check for not NULL. I think it's not NULL, since I believe NULL is not nil. Maybe someone can clear this up?

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  • ObjC: required to optional

    - by Joschy
    Hello Guys! Situation: A protocol A implements a protocol B. B has some @optional and some (@)required methods. Question: Is it possible in protocol A to set a method from B to the opposite (opt. to reeq. and vv.)? Cheers!

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  • Make an NSString accessible in the whole class

    - by OhhMee
    Hello, I want to know how can I make an NSString accessible in the whole class. Say I have these codes: - (void) init { NSArray *elements = [xpathParser search:@"//foo"]; TFHppleElement *element = [elements objectAtIndex:0]; NSString *data = [element content]; NSArray *elements1 = [xpathParser search:@"//foo2"]; TFHppleElement *element2 = [elements1 objectAtIndex:0]; NSString *data2 = [element2 content]; } And I want to use data & data2 in the whole class, how can I do that? I want to show results here: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. switch (indexPath.row) { case 0 : cell.textLabel.text = (@"%@", data); break; case 1: cell.textLabel.text = (@"%@", data2); break; } // Email & Password Section return cell; }

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  • comparison between point and integer

    - by LawVS
    Right, basically I want to add two numbers together. It's for a working hours calculator and I've included parameters for a night shift scenario as an if statement. However, it now mucks up the day shift pattern. So I want to sort out that if the start time is below 12, then it'll revert to the original equation shown in the code instead of the if statement. -(IBAction)done:(id)sender { int result = [finishHours.text intValue] - [startHours.text intValue]; totalHours.text = [NSString stringWithFormat:@"%d", result]; if (result < 0) { totalHours.text = [NSString stringWithFormat:@"%d", result * -1]; } if (result < 12) { totalHours.text = [NSString stringWithFormat:@"%d", result + 24]; } if (startHours < 12) { totalHours.text = [NSString stringWithFormat:@"%d", result - 24]; }

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  • Don't know how to encrypt database using SQLCipher

    - by Armaan
    I have included SQLCipher into my project exactly like explained in this link: http://sqlcipher.net/ios-tutorial/ But I am not sure how to encrypt the database I have read description from above link but not getting. Actually what I am doing is if application is opening first time then it will copy the database(i.e. without encryption) to the document directory. One more thing my database is blank when copying from bundle to document directory. I have tried to use sqlite3_key function after opening the database but nothing is encrypted. But I didn't found something like how to encrypt database when copying from bundle to document directory. I am planning to use FMDB so it would be better to reply according to that. Please guide me how to do that or point to direction if is there any tutorial for it. Also suggest what should be the standard approach to do that.

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  • how can i set the background color of a particular button in iphone ?

    - by suchita
    for this I used btnName1 = [ColorfulButton buttonWithType:UIButtonTypeRoundedRect]; btnName1.frame=CGRectMake(45,146,220,40); [btnName1 setTitle:@"Continue" forState:UIControlStateNormal]; [btnName1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [btnName1 setImage:[UIImage imageNamed:@"green.png"] forState:UIControlStateNormal]; UIImage *img =[UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"greenish" ofType:@"png"]]; UIImage *strechableImage = [img stretchableImageWithLeftCapWidth:12 topCapHeight:0]; [btnName1 setBackgroundImage:strechableImage forState:UIControlStateNormal]; [btnName1 setNeedsDisplay]; [InfoView addSubview:btnName1]; it's correctly working on iphone simulator but not on ipod(color not show in ipod)

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  • iphone - Images (slide show) and audio snychronization

    - by Qaiser
    I have 20 images and some audio. I would like to show a single image at a time and change the images at (unequal) intervals. For example, I want to show image 1 for 1.44 seconds and image 2 for 1.67 seconds and so on. Can someone suggest how to go about doing this please? What I have seen are examples that show how to setup an array of images with one field that denotes total time. This causes the images to show for an equal amount of time (each). ... and that not what I am looking for ...

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  • IBOutlets are always nil

    - by Jonas
    Hi, In IB I have subclassed the File Owner and the subclass loads my .nib. The subclass itself doesn't need access to the IBOutlets so they're instance variables in another class, which I added as a subclass of NSObject in the .nib. Then I connected the interface elements to that object. But somehow, in the class that "owns" the IBOutlets, they show up as nil. What am I doing wrong here?

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  • c++ class in cocoa

    - by joels
    Any ideas why Xcode wont let me define a c++ class in my cocoa project? I am trying to use a C++ class in my cocoa project but I am getting build errors just creating the c++ header file. class SomeClass{ public: int count; } Expected '=', ',', ';', 'asm' or 'attribute' before 'SomeClass' in ..... If I remove all code from the header file, ?the cpp file builds without any errors and is included in the list of compiled sources...

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  • CGRect var as property value?

    - by David.Chu.ca
    CGRect type is a structure type. If I want to define a property as this type, should I use assign or retain attribute for this type? @interface MyClass { CGRect rect; ... } @property (nonatomic, assign) rect; // or retain?

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  • Retrieving Relationships from within two arrays of pointers

    - by DanF
    In a portion of a program I'm working on, I need to count all the times each person has worked on projects with each other person. Let's say we have "Employee" entities and "Session" entities. In each session, there are four project types, "A", "B", "C", & "D", each a many-to-many relationship to Employees. I'm making a loop to systematically review every person a selected person has worked with. First, I put all their project types in a single array, so it's easier to loop through, but by the time I ask the last nested Project for its Employee members, I get an "unrecognized selector" error. IBOutlet NSArrayController * list; int x; for(x = 0; x < [list count]; x++){ NSArray *A = [[list objectAtIndex:x] valueForKey:@"projectAs"]; NSArray *A = [[list objectAtIndex:x] valueForKey:@"projectBs"]; NSArray *A = [[list objectAtIndex:x] valueForKey:@"projectCs"]; NSArray *A = [[list objectAtIndex:x] valueForKey:@"projectDs"]; NSArray *masterList = [[NSArray alloc] initWithObjects: projectAs, projectBs, projectCs, projectDs, nil]; int y; for(y = 0; y < [masterList count]; y++){ int z; for(z = 0; z < [[masterlist objectAtIndex:y] count]; z++){ //And now to make an Array of this employee's partners on the selected object, to run comparisons on. //I also have an array of keys for each session's teams, so that's what I'm referencing here: NSArray * thisTeam = [list objectAtIndex:y] objectAtIndex:z] valueForKey:projectKey]; This throws an exception... namely, -[_NSFaultingMutableSet objectAtIndex:]: unrecognized selector sent to instance What's wrong with that last Array creation?

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  • when i set property(retain), one "self" = one "retain"?

    - by Walter
    although I'm about to finish my first app, I'm still confused about the very basic memory management..I've read through many posts here and apple document, but I'm still puzzled.. For example..I'm currently doing things like this to add a label programmatically: @property (retain, nonatomic) UILabel *showTime; @sythesize showTime; showTime = [[UILabel alloc] initWithFrame:CGRectMake(45, 4, 200, 36)]; [self.showTime setText:[NSString stringWithFormat:@"%d", time]]; [self.showTime setFont:[UIFont fontWithName:@"HelveticaRoundedLT-Bold" size:23]]; [self.showTime setTextColor:numColor]; self.showTime.backgroundColor = [UIColor clearColor]; [self addSubview:self.showTime]; [showTime release]; this is my current practice, for UILabel, UIButton, UIImageView, etc... [Alloc init] it without self., coz I know this will retain twice.. but after the allocation, I put back the "self." to set the attributes.. My gut feel tells me I am doing wrong, but it works superficially and I found no memory leak in analyze and instruments.. can anyone give my advice? when I use "self." to set text and set background color, does it retain one automatically? THX so much!

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  • does != nil check for 0x0?

    - by 4thSpace
    I have a custom class and check that a property isn't 0x0 by doing: if(myinstance.someproperty != nil){ //do something } However, even if someproperty is 0x0, I still go into the conditional. someproperty is of another class type. Is there some other way to check this?

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  • XCode - Automatically add all files in a folder to a target

    - by Akshay
    In XCode, is there a way to specify that all files in a folder are compiled by a target. Eg. the 'Test' target automatically compiles all files in the 'Tests' folder, whereas the 'App' target compiles everything in the 'Sources' folder. Today, the way I'm doing it, is to add a file to a target everytime I create it. This feels a bit error prone and redundant since the files are already organized in the correct folders. Thanks.

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  • Content Alignment Issue in UITableView cell

    - by OhhMee
    Please see the image attached. I don't understand why it's going outside. I've also attached code snippet for tableView. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; // cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton; } // Configure the cell. hNode* dCell = [array objectAtIndex:[indexPath row]]; cell.textLabel.text = @"Message"; cell.detailTextLabel.text = [NSString stringWithFormat:@"%@",[dCell contents]]; cell.detailTextLabel.lineBreakMode = UILineBreakModeWordWrap; cell.detailTextLabel.numberOfLines = 0; [[cell imageView] setImage:[UIImage imageNamed:@"user.png"]]; return cell; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath { return 60; } Where could be the issue?

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  • How do I load a Direct X .x 3D model in iPhone SDK?

    - by Alex
    I have been searching the internet for the last few days trying to figure this out. My goal is to draw a textured and animated .x file exported from a 3D program. I found a tutorial of how to load and draw a .obj file, which I understand, but the tutorial doesn't say how to texture it, and .obj doesn't support animation. The .x file structure is human readable just like .obj, but I have no clue how to texture it, and I might be able to figure out how to animate it, but I would prefer to be instructed on that. Any help would be GREATLY appreciated.

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  • remove 2 subviews in one go.

    - by Pavan
    hi, I am trying to remove two viewcontrollers (that have been added on top of each other) with one method. I have made the views in interfacebuilder. they all have their own .h and .m files to go with it. Scenario I am in: I have a main menu which has the view2 header file imported. In a method I add the second view on top of the superview like so view2ViewController * view2 = [[view2ViewController alloc] initWithNibName:@"view2ViewController" bundle:nil]; [self.view addSubview:view2.view]; then in view 2 I have added the view 3 header file so i can add view 3 as a subview ontop of view2. i have another method which is connected again to interface builder to a UIButton so upon button press a method gets called in view2 which adds view 3 on top in exactly the same way like so: view3ViewController * view3 = [[view3ViewController alloc] initWithNibName:@"view3ViewController" bundle:nil]; [self.view addSubview:view3.view]; What im trying to solve: I have a button in view 3 which should remove view 3.... and then it should also remove view 2 aswell so the main screen is visible. How can this be achieved? What I have so far: [self.view removeFromSuperview]; This however only removes View 3... but leaves view 2 in place. What needs to be modified so that i can remove view 2 as well?? Any help is appreciated.

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  • Define background Image with UIImage

    - by Wohoo Summer
    I am using header file to set the background for my application and I have something like #define backgroundImage [UIColor colorWithPatternImage:[UIImage imageNamed:@"background.jpeg"]] but I want use UIImageView instead of UIColor. I know I can do: UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480) [imageView setImage:[UIImage imageNamed:@"background.png"]]; self.tableView.backgroundView = imageView; but how do I use it with #define?

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  • When will [MFMailComposeViewController canSendMail] return NO

    - by pythonquick
    M iPhone app is using the MFMailComposeViewController class to send an in-app email with an attachment. The app will only attempt to display the mail composer dialog if the "canSendMail" method of class MFMailComposeViewController returns true (YES). Specifically, if the following method returns YES, it shows the mail composer, otherwise the user is presented with an error alert dialog stating that there are no email accounts set up on the device: - (BOOL)canDeviceSendEmail { Class mailClass = (NSClassFromString(@"MFMailComposeViewController")); return mailClass != nil && [mailClass canSendMail]; } A team of testers have reported that they get this error alert dialog, even when email accounts are set up on the device. The tester used an iPhone 3G with OS 3.1.3. Therefore the MFMailComposeViewController class must have existed, and the "canSendMail" method must have returned NO. My question is therefore: apart from the case when there are no email accounts set up on the device, in what other circumstances can the "canSendMail" method return NO? ~ Thanks

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