␡
- Working with Uniform Type Identifiers
- Accessing the System Pasteboard
- Recipe: Passively Updating the Pasteboard
- Recipe: Enabling Document File Sharing
- Recipe: Monitoring the Documents Folder
- The Document Interaction Controller
- Recipe: Checking for the Open Menu
- Declaring Document Support
- Recipe: Implementing Document Support
- Exported Type Declarations
- Creating URL-Based Services
- Recipe: Adding Custom Settings Bundles-Or Not
- Summary
This chapter is from the book
This chapter is from the book
This chapter is from the book
This chapter is from the book
Recipe: Passively Updating the Pasteboard
iOS selection and copy interface are not, frankly, the most streamlined elements of the operating system. There are times when you want to simplify matters for your user while preparing content that’s meant to be shared to other applications. Consider Recipe 16-1. It allows the user to use a local editor to enter and edit text, while automating the process of updating the pasteboard. When the watcher is active (toggled by a simple button tap), the text is sent to the pasteboard on each edit. This is accomplished by implementing a text view delegate method (textViewDidChange:) that responds to edits by automatically assigning those changes to the pasteboard (updatePasteboard).
Recipe 16-1. Creating an Automatic Text-Entry to Pasteboard Solution
@implementation TestBedViewController
- (void) updatePasteboard
{
// Copy the text to the pasteboard when the watcher is enabled
if (enableWatcher)
[UIPasteboard generalPasteboard].string = textView.text;
}
- (void)textViewDidChange:(UITextView *)textView
{
// Delegate method calls for an update
[self updatePasteboard];
}
- (void) toggle: (UIBarButtonItem *) bbi
{
// switch between standard and auto-copy modes
enableWatcher = !enableWatcher;
bbi.title = enableWatcher ? @"Stop Watching" : @"Watch";
}
- (void) loadView
{
[super loadView];
// Build a text view and set the delegate to self
textView = [[UITextView alloc] initWithFrame:CGRectZero];
textView.font = [UIFont fontWithName:@"Futura"
size: IS_IPAD ? 32.0f : 16.0f];
textView.delegate = self;
[self.view addSubview:textView];
// Add a toggle button
self.navigationItem.rightBarButtonItem =
BARBUTTON(@"Watch", @selector(toggle:));
}
- (void) viewDidAppear:(BOOL)animated
{
// Always perform an update whenever the view appears
textView.frame = self.view.bounds;
[self updatePasteboard];
}
- (void) didRotateFromInterfaceOrientation:
(UIInterfaceOrientation)fromInterfaceOrientation
{
// Update presentation
[self viewDidAppear:NO];
}
@end