ios5

问题 I am new to iOS and obective-c so I am not too sure how to best accomplish this seemingly simple task. What I want is to make a class that looks like this in pseudocode: class UtilityClass { // Have a method that I can pass parameters to String doCalculation ( String art1 , String arg2 ) { return arg1 + arg2; } } My uncertainty is: 1) xCode seems to be inclined to lay out my file structure in a relatively flat way. So should I make a utils directory and have this file be under utils/fileName

问题 I'm building an app for a blog site. I have a UINavigationController with a UITableViewController as it's root view. I laid this out in a storyboard no problem, but I'm trying to drag an iAd view to the bottom of the screen and xcode will not let me add it. It looks like I have to switch from a subclass of UITableViewController to a subclass of UIViewController, and just put my delegate and datasource methods in my subclassed UIViewController. This seems wrong to me. I'm just trying to end up

问题 I already have the base code that supports ios 4.3 to ios 5. Now I would also like to support ios 6.0. The present base code has modal views , hard coded CGRect's , and rotation is different for each view. So I would like to know whether we can support ios 4.3 to ios 6.0 with the same base code, by just tweaking some changes, or do we need to create a complete new target? Like we cannot use auto layout of ios 6.0 if I want to support previous versions as it will lead to a crash. 回答1: Yes, we

问题 I'm using a UITableViewController for a table in my app, and I've added an NSFetchedResultsController to provide the data to show in the table (setting self as it's delegate). However I would like to add a unique cell as the last cell of the table, unrelated to the items produced by the NSFetchedResultsController 's predicate, I want this cell to always be at the bottom of the table. I've tried simply added 1 to these methods in the table view data source: - (NSUInteger

问题 I'm using a UITableViewController for a table in my app, and I've added an NSFetchedResultsController to provide the data to show in the table (setting self as it's delegate). However I would like to add a unique cell as the last cell of the table, unrelated to the items produced by the NSFetchedResultsController 's predicate, I want this cell to always be at the bottom of the table. I've tried simply added 1 to these methods in the table view data source: - (NSUInteger

问题 I'm using a UITableViewController for a table in my app, and I've added an NSFetchedResultsController to provide the data to show in the table (setting self as it's delegate). However I would like to add a unique cell as the last cell of the table, unrelated to the items produced by the NSFetchedResultsController 's predicate, I want this cell to always be at the bottom of the table. I've tried simply added 1 to these methods in the table view data source: - (NSUInteger

问题 My App is a JSON code which involves a date in string type. (Such as "2011-10-01"). I would like to know how I could conver it into NSDate? It needs to be displayed in a different time format such as "1 October, 2011". ex. this code doesn't work: NSString *date1 = @"2010-11-12"; NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MMMM-dd"]; NSDate *date2 = [dateFormat dateFromString:date1]; NSString *strdate = [dateFormat stringFromDate:date2]; 回答1:

问题 While MGTwitterEngine works well on previous versions of iOS, it failed with EXC_BAD_ACCESS at moment when I try to post twit: [twitter sendUpdate:textToShare]; The last list of Objective-C code executer is: [theRequest prepare]; inside SA_OAuthTwitterEngine.m. This is call stack: #1 0x00045a63 in -[OAMutableURLRequest URLEncodedString:] at /Users/ben/Dropbox/Dev/External Projects/Twitter-OAuth-iPhone/OAuthConsumeriPhoneLib/OAuthConsumerSrc/OAMutableURLRequest.m:287 #2 0x000445fa in -

问题 I have created some PDF files programatically, which i am storing into the devices memory using the following code >>>> NSString *fileName = [NSString stringWithFormat:@"SampleTextFile.pdf",strFinalString]; NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *saveDirectory = [path objectAtIndex:0]; NSString *saveFileName = fileName; NSString *documentPath = [saveDirectory stringByAppendingPathComponent:saveFileName]; I can see the file in

问题 Apple is missing documentation on how to use UIPopoverBackgroundView class introduced in iOS5. Anyone have an example? I have tried to subclass it, but my XCode 4.2 on Lion is missing UIPopoverBackgroundView.h Edit: Unsurprisingly, it should have been imported as #import <UIKit/UIPopoverBackgroundView.h> 回答1: To add to the other, link-only answers, here is how this is done. Create a new subclass of UIPopoverBackgroundView Declare the following in your interface: +(UIEdgeInsets