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  • Configure UIDatePicker with current locations time

    - by Telkitty
    I am using UIDatePicker in my current app, here is how I set a UILabel with the date time string obtained from the UIDatePicker. -(IBAction)AddTimeEnd:(id)sender { NSDate * date = [m_DateTimePicker date]; m_DateTimeLabel.text = [date description]; } Somehow the time I have entered (EST) kept on getting converted to US time in the UILabel. Does anyone know how to fix it? I would like the time entered in UIDatePicker to be consistent with the text in the label (probably the simplest way is set the locale for the UIDatePicker to be the local timezone)?

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  • Is there any way to get the iPhone Model number ?

    - by makboney
    I just figure out the device on which i'm working by the code given bellow: struct utsname systemInfo; uname(&systemInfo); NSLog(@"%@", [NSString stringWithCString:systemInfo.version encoding:NSUTF8StringEncoding]); But is there any way to find the model of my iPhone??? Thanks in advance ....

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  • iPad View Rotation Duration

    - by federivo
    Hi everyone! When changing the orientation of the iPad, my app rotates its view very fast. It is difficult to perceive the transition between both orientations. I would like to increase a little bit the duration of this transition. Does anyone know how to increase the duration of this transition? Thanks!

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  • Validate NSString

    - by Chris
    I am validating an NSString to ensure that the string does not contain apostrophes. The code I'm using to do this is NSCharacterSet * invalidNumberSet = [NSCharacterSet characterSetWithCharactersInString:@"'"]; NSScanner * scanner = [NSScanner scannerWithString:string]; NSString * scannerResult; [scanner setCharactersToBeSkipped:nil]; [scanner scanUpToCharactersFromSet:invalidNumberSet intoString:&scannerResult]; if(![string isEqualToString:scannerResult]) { return 2; } Returning 2 represents an error. This code works, except for the case where the string is an apostrophe. To get around this issue, I added the following code above the preceding block. if([string isEqualToString:@"'"]); { return 2; } This code is evaluating to true, regardless of the input. I need to either prevent the first block from crashing with the input of ', or get the second block to work. What am I missing?

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  • How does Undo work?

    - by dontWatchMyProfile
    How does undo work? Does it copy all the managed objects every time any of the values change? Or does it only copy the actual changes together with an information which objects were affected? Is that heavy or lightweight?

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  • Comparing the values of two nsstrings

    - by user1776234
    So I have been trying to compare two NSStrings in xcode. However, it is not working. What am I doing wrong? NSString Prog are characters that are xml parsed from mysql char *cStr = "YES"; NSString *str3 = [NSString stringWithUTF8String:cStr]; if ([str3 isEqualToString:prog]) { [switch1 setOn:YES animated:YES]; } else { [switch1 setOn:NO animated:YES]; }

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  • How to call a method on UIButton in NSArray?

    - by user1792818
    I'm trying to enable a button but the button that I would enable in this function changes. I have an array of the buttons but when I use the .enabled on the array index I want it says that this doesn't work for IDs. I have used this array to set the text of each button before using: [[ButtonArray objectAtIndex: Index] setTitle:(@"blahblahblah") forState: UIControlStateNormal]; is there any way to use a similar function call to enable and disable?

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  • Setting up an independent delegate?

    - by fuzzygoat
    Its common for the dataSource and delegate to be the same object, its also common for this object to be the viewController. In all the info/tutorials that I have seen online delegates are always setup as above. If I wanted to create my own class instead can anyone give me any pointers as to how I might do that. Where does that object get instantiated, how do you connect the dataSource and delegate items etc. I am using UITableView to test this.

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  • How to remove NSDate objects from a NSMutableArray

    - by Ryan
    I have been working with NSArrays and NSMutableArrays that store NSDate objects for a few days now. I noticed that calling [listOfDates removeObject:date1] removes all the NSDate objects from the array. I have instead been doing this to remove objects: NSMutableArray *dateList; // Has Dates in it NSDate *dateToRemove; // Date Object to Remove __block NSUInteger indexToRemove; __block BOOL foundMatch = NO; [dateList enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { if ([obj isEqualToDate:dateToRemove]) { indexToRemove = idx; foundMatch = YES; *stop = YES; } }]; if (foundMatch) { [dateList removeObjectAtIndex:indexToRemove]; } Is there a better way to be doing this? Perhaps another data structure? Or a simpler function?

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  • Adding the scrollview created by photoscroller to a subview

    - by wierddemon
    I'm trying to modify Apple's PhotoScroller example to make the scrollview that is created into a subview instead of it being a view that takes up the entire screen. Any ideas on how this can be accomplished? - (void)loadView { // Step 1: make the outer paging scroll view CGRect pagingScrollViewFrame = [self frameForPagingScrollView]; pagingScrollView = [[UIScrollView alloc] initWithFrame:pagingScrollViewFrame]; pagingScrollView.pagingEnabled = YES; pagingScrollView.backgroundColor = [UIColor blackColor]; pagingScrollView.showsVerticalScrollIndicator = NO; pagingScrollView.showsHorizontalScrollIndicator = NO; pagingScrollView.contentSize = [self contentSizeForPagingScrollView]; pagingScrollView.delegate = self; // When I do this it fails [self.view addSubview:pagingScrollView]; // Step 2: prepare to tile content recycledPages = [[NSMutableSet alloc] init]; visiblePages = [[NSMutableSet alloc] init]; [self tilePages]; }

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  • Looking for some help working with premultiplied alpha

    - by user315142
    I am trying to update a source image with the contents of multiple destination images. From what I can tell using premultiplied alpha is the way to go with this, but I think I am doing something wrong (function below). the image I am starting with is initialized with all ARGB values set to 0. When I run the function once the resulting image looks great, but when I start compositing on any others all the pixels that have alpha information get really messed up. Does anyone know if I am doing something glaringly wrong or if there is something extra I need to do to modify the color values? void CompositeImage(unsigned char *src, unsigned char *dest, int srcW, int srcH){ int w = srcW; int h = srcH; int px0; int px1; int px2; int px3; int inverseAlpha; int r; int g; int b; int a; int y; int x; for (y = 0; y < h; y++) { for (x= 0; x< w*4; x+=4) { // pixel number px0 = (y*w*4) + x; px1 = (y*w*4) + (x+1); px2 = (y*w*4) + (x+2); px3 = (y*w*4) + (x+3); inverseAlpha = 1 - src[px3]; // create new values r = src[px0] + inverseAlpha * dest[px0]; g = src[px1] + inverseAlpha * dest[px1]; b = src[px2] + inverseAlpha * dest[px2]; a = src[px3] + inverseAlpha * dest[px3]; // update destination image dest[px0] = r; dest[px1] = g; dest[px2] = b; dest[px3] = a; } } }

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  • iOS: Releasing Object Thats In Use (ARC)

    - by RileyE
    I have an object that I have created that subscribes to some NSNotificationCenter notifications, but it is being released, since I don't have a pointer to the instantiation. The instantiation has a delegate that will call a method back to another class I have, so I felt it unnecessary to also have a pointer to it, since the pointer doesn't serve any purpose. Basically, I have an instantiation of a class, DelegateListener (name is just for example purposes), which subscribes to some of the default NSNotificationCeneter's notifications. This instantiation isn't assigned to any pointer after the instantiation ends. The instantiation, however, has a property, delegate. I assign a value to that delegate during the instantiation. That delegate implements methods that I want the DelegateListener to call when the notifications that it subscribed to fire. The problem with this is that the instantiation of DelegateListener that I create gets released, unless if I assign it to a retained pointer. Is there a way to avoid this automatic release of my DelegateListener instantiation within ARC?

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  • Singleton Creation preference

    - by cwieland
    You can create singletons in a variety of ways. I am wondering which is better between these. +(ServerConnection*)shared{ static dispatch_once_t pred=0; __strong static id _sharedObject = nil; dispatch_once(&pred, ^{ _sharedObject = [[self alloc] init]; // or some other init method }); return _sharedObject; } I could see that this compiles down to something very fast. I would think that checking the predicate would be another function call. The other is: +(ServerConnection*)shared{ static ServerConnection* connection=nil; if (connection==nil) { connection=[[ServerConnection alloc] init]; } return connection; } Are there any major differences between the two? I know these are probably similar enough to not worry about it. But Just wondering.

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  • Question About Classic MVC

    - by kernix
    Hello, In classic MVC the model notifies the view about changes made on it. In C# this means I have to subclass the View I'm interested in and in the subclassed class register to the model's event. For example, if I were to implement MVC using C# and Winforms, I had to subclass TextBox class and then register inside the MyTextBox's constructor for the model events. Am I correct? How was this issued in Smalltalk? Does one also need to subclass every View in order to register the model's events, or is there some way to dynamically add events to the views on the fly? Thanks

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  • Uploading video file to server from iPhone

    - by SshUser
    I know how to upload images to a server running PHP, but I am stuck on uploading video. I have used this advice to upload my video file. Posting method is all ok. What I get on the server is a file of 0 bytes. My code is below: - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL]; NSData *videoData = [NSData dataWithContentsOfFile:[videoURL path]]; } This videoData is passed in my POST method. What should I do instead?

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  • Animation in a table view cell

    - by theomen
    I'm not sure if it is possible to achieve, but my costumer wants that when user taps a table view cell, an animation of a UIView sliding from left to right is committed, leaving the content under the UIView visible. My concern is about how to trigger gesture recognizer added to the upper UIVIew for the animation and do not enter in conflict with didSelectRowatIndex: table view delegate method. Is it possible to achieve? Mant thanks!

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