ios4

问题 Is there a way to change the tint/background color of UIDocumentInteractionController navigationbar ? 回答1: A cleaner version of @DOOManics implementation: - (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller { return [self navigationController]; } 回答2: If you put the UIDocumentInteractionController onto a UINavigationController it will automatically take the color its navbar. This is probably your root view navcontroller.

问题 I have a custom View class built which subclasses UIView. This view is loaded through a nib file in the ViewController via: [[NSBundle main] loadNibNamed:@"MyCustomView" owner:self options:nil]; Inside MyCustomView.h (which correctly hooked up in IB as the Main Views class) I have some subview properties linked: @interface MyCustomView : UIView <UITextFieldDelegate> { .... @public UIView *backgroundLayer; // a subview of the Main View inside the nib .... } @property (nonatomic, retain)

问题 I have a View application with a Single UIViewController . I then add a UITableViewController through the IB, and I am trying to display the UITableViewController through a button press in the UIViewController (my main view). My button press (IBAction) contains the following code through which I am trying to push my UITableViewController view and display it: DataViewController *dataController = [[DataViewController alloc] initWithNibName: @"DataViewController" bundle:nil]; [self

问题 I've been searching the internet for most of the day today trying to find an answer to this problem. Bascially, I'm trying to create a small app which receives pdfs (from the iTunes file explorer and from a url) then encrypts them and saves them for decryption later. I've tried using Quartz but with not a lot of documentation available, its difficult. I'm just looking for some guidance on how i should approach this. Any help is much appreciated. Thanks 回答1: You can use the PDFDocument class

问题 I am sending HTML in mail using MFMailCompose. This HTML includes strings and images. So when I use to send this mail, It is sending text only. It does not display any images. How can I send my all HTML data So that images are shown in email ? 回答1: You can have inline images in HTML but you have to encode the attachments data using base64 encoding. This leads to problems with some email clients e.g. Gmail. Please find a detailed discussion on this issue here: How to add a UIImage in

问题 How to detect space, and special characters like :, ?,`,~, etc in text of a textfield in iPhone SDK? 回答1: Try this.. NSCharacterSet* symbols = [NSCharacterSet symbolCharacterSet]; if([symbols characterIsMember: yourCharacter]) { //Check Your condition here } If you want to include many characters Use a combined NSCharacterset with NSMutableCharacterSet.. NSMutableCharacterSet *space = [NSMutableCharacterSet characterSetWithCharactersInString:@" "]; [space formUnionWithCharacterSet:

问题 I have tried to implement the Asset Library and create a Custom Image Picker. Specifically, I am trying to run the code given here: http://icodeblog.com/2010/10/07/cloning-uiimagepickercontroller-using-the-assets-library-framework/ The code runs perfectly well in Simulator 4.1 but when I try 4.0 or 4.2 it gets stuck on the Loading screen and it gives me the following comment on the GDB: 2010-11-16 16:37:27.514 ELCImagePickerDemo[49819:6b03] A problem occured It's from this line in the code:

问题 I use below code for change textcolor of each segmented in UISegmentedcontrol how can I change textcolor of specific segment?(for example segment at index 2) for (id seg in [segment subviews]) for (id label in [seg subviews]) if ([label isKindOfClass:[UILabel class]]) [label setTextColor:[UIColor redColor]]; 回答1: i use below code for this problem int eg=0; for (id seg in [sg subviews]) { int gg=sg.selectedSegmentIndex; if(gg==2) gg=0; else if(gg==0) gg=2; if(eg==gg && eg!=1) { for (id label

问题 Which is more efficient for storing cache data. I see Twitter for Mac stores blobs of information inside a sqlite file. Some apps implement NSCoding protocol. Is there any advantage of one over another? 回答1: The two are quite different. SQLite is a relational database, the stuff around NSCoding is an object serialization technique. The choice depends on your cache data. If your cache is a bunch of objects, I’d certainly go for NSCoding , as it’s very simple to work with, much simpler than raw

问题 I'm looking to add Streetview function to my current iphone app maps I made with MKMapView. Any idea how to do this? Thx for helping, Stephane 回答1: Unless you want to spend a long time mapping tiles onto a 3D world, you can give a link to the maps app, which lets the user choose Street View. If you want an easy way to embed Street View, use the (fairly new) Street View Image API, which returns static images for a location and heading (relative to the road): http://maps.googleapis.com/maps/api