I am trying to get current view open in my code using this code in delegate while handling Push Notification
NSArray *views = window.subviews;
NSLog(#"views: %#", views);
UIView *topview=[views lastObject];
when is click on topview and see using below tool (eye mark) it shows the current view
open .
But when i am try to get its kind of class using below two method none of these work
for(UIView *view in window.subviews)
{
if([view isKindOfClass:[MyClass class]])
{
NSLog(#"view is a MyClass\n");
}
}
or
if ([topview isKindOfClass:[MyClass class]])
{
NSLog(#"topview is a MyClass\n");
}
else
{
NSLog(#"topview is NOT a MyClass\n");
}
How can i get my visible view name of kind of class.
self.navigationController.viewControllers returns a UIViewController* array, not a UIView* array.
So, for your first solution:
for(UIViewController *viewController in self.navigationController.viewControllers)
{
if([viewController.view isKindOfClass:[MyClass class]])
{
NSLog(#"view is a MyClass\n");
}
}
will work.
For the visible UIViewController*, you can use:
UIViewController* viewController = self.navigationController.visibleViewController;
For the topmost view:
UIView* topmostView = [[[[UIApplication sharedApplication] keyWindow] subviews] lastObject];
Related
I have a need to get all labels in current view. is it possible? If yes, please advise how can i realize this?
For example, i need to collect all labels from startup screen, then from currently showing popup and etc.
Thanks!
Here is the way to go----
NSMutableArray *labels = [NSMutableArray array];
for (UIView *v in someSuperview.subviews) {
if ([v isKindOfClass:[UILabel class]]) {
[labels addObject:v];
}
}
Suppose if you want to collect label in an array, you can try this:
for (UIView *subview in self.view.subviews)
{
if(subview isKindOfClass:[UILabel class])
{
[arrayOfLabels addObject:subview];
}
}
If you want it to do by means of accessibilityLabel, here are the steps to get view from given accessibilityLabel. Method viewContainingAccessibilityElement:element is extension method to UIAccessibilityElement class.
UIAccessibilityElement *element = [[UIApplication sharedApplication] accessibilityElementWithLabel:label];
UIView *view = (UIView*)[UIAccessibilityElement viewContainingAccessibilityElement:element];
Let me know if it works
I am using the iPad master / detail project template and I'm trying to update some UILabels in the detailViewController when the app is first run.
Here is My Code :
(void)setObject:(id)newObject
{
if (_object != newObject) {
[_object release];
_object = [newObject retain];
[self configureView];
}
if (self.masterPopoverController != nil) {
[self.masterPopoverController dismissPopoverAnimated:YES];
}
}
- (void)configureView
{
[self updateDetails];
}
- (void) updateDetails
{
NSLog(#"Details = %#", self.details);
NSLog (#"detailLabel %#", self.detailLabel);
self.detailLabel.text = [self.details objectForKey:#"aKey"];
}
- (IBAction)refresh:(UIBarButtonItem *)sender {
[self updateDetails];
}
setEvent is called from the Master View Controller's viewDidLoad method as selecting it's tableview's 1st row as a default.
if (![self.tableView indexPathForSelectedRow])
{
[self.tableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] animated:NO scrollPosition:0];
[self.detailViewController setObject:[self.sortedObjects objectAtIndex:0]];
}
When I run the code the detailLabel is not changed and the NSLog says self.detailLabel is (null). If 'refresh' is called later from a button click detailLabel is not null and updates correctly. How can I do this to make sure the detailLabel has been created and is not (null)?
The IBOutlet objects will be created at the time of viewDidLoad() of that object(detail view, but not master view).
call the [self updateDetails]; in viewdidLoad() method of detail view controller to avoid this problem.
I'm trying to check if a viewcontroller has already been created. If the view already exists then it should become the current view. If it doesn't exist then it should be created and made visible.
My code is
DemoViewController *demoController = [DemoViewController alloc];
for(DemoViewController *view in self.navigationController.viewControllers)
{
if([view isKindOfClass:[DemoViewController class]])
{
viewExists=true;
demoController=view;
}
}
if (!viewExists) {
demoController initWithNibName:#"DemoViewController" bundle:nil;
}
[view release];
[demoController release];
I'm not sure where I'm going wrong but it would appear that the for loop isn't being executed.
Any help would be great!
Try like this:
DemoViewController* demoController = nil;
for(int vv=0; vv<[self.navigationController.viewControllers count]; ++vv) {
NSObject *vc = [self.navigationController.viewControllers objectAtIndex:vv];
if([vc isKindOfClass:[DemoViewController class]]) {
demoController = (DemoViewController*)vc;
}
}
if (demoController == nil) {
demoController = [[DemoViewController alloc] initWithNibName:#"DemoViewController" bundle:nil];
// Do we need to push it into navigation controller?
}
[demoController release];
I am new to objective-c and cocoa so please break things down for me. I'm working on a project started by another developer and have only been working in objective-c for 3 days.
I have an NSWindow subclass that contains a WebView view. The WebView content that is loaded is a Silverlight plugin. I registered the NSWindow to receive Drag events. The drag events are being generated but only when the drag occurs within the NSWindow Title Bar. I register for the drag events in the load method.
AdminWindow.mm
#import "AdminWindow.h"
#import "NativeMessageReceiver.h"
extern AdminWindow* adminRiaWindow;
#implementation AdminWindow
#synthesize adminWebView;
BOOL isAdminContentLoaded;
-(void) load
{
if (!isAdminContentLoaded)
{
NSLog(#"loading Admin window");
NSString *curDir = [[NSBundle mainBundle] bundlePath];
NSString* url = [NSString stringWithFormat: #"file://%#/Contents/Resources/RIA/AdminContentMac.html",curDir];
[[adminWebView mainFrame] loadRequest: [NSURLRequest requestWithURL: [NSURL URLWithString: url]]];
[adminWebView setDrawsBackground:NO];
id win = [adminWebView windowScriptObject];
NativeMessageReceiver* receiver = [NativeMessageReceiver getInstance];
[win setValue:receiver forKey:#"NativeMessageReceiver"];
receiver.adminWebView = adminWebView;
isAdminContentLoaded = YES;
}
}
-(void) show
{
[self load];
[self setIsVisible: YES];
[[NSApplication sharedApplication] activateIgnoringOtherApps:YES];
[self makeKeyAndOrderFront: self];
[self makeMainWindow];
[self center];
}
-(void) hide
{
[self setIsVisible: NO];
}
- ( BOOL ) windowShouldClose : ( id ) sender
{
[self setIsVisible: NO];
return NO;
}
- (BOOL) canBecomeKeyWindow
{
return YES;
}
- (BOOL) canBecomeMainWindow
{
return YES;
}
#end
extern "C" void ShowAdminWindow()
{
NSLog(#"showing Admin window");
if (![NSThread isMainThread])
[adminRiaWindow performSelectorOnMainThread:#selector(show) withObject:nil waitUntilDone:YES];
else
{
[adminRiaWindow show];
}
}
extern "C" void HideAdminWindow()
{
if (![NSThread isMainThread])
{
[adminRiaWindow performSelectorOnMainThread:#selector(hide) withObject:nil waitUntilDone:YES];
}
else
{
[adminRiaWindow hide];
}
}
CustomeWebView
#implementation SteamPunkWebView
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
[self registerForDraggedTypes:[NSArray arrayWithObjects: NSFilenamesPboardType, nil]];
NSLog(#"In Custom View Init");
}
return self;
}
I think you're only getting drag events in the title bar because you registered the window to receive the events, not the web view.
Try this instead:
[self.adminWebView registerForDraggedTypes:[NSArray arrayWithObjects: NSFilenamesPboardType, nil]];
WebViews are one of the most complex views in Cocoa and are a special case when it comes to dragging. Instead of implementing the standard NSView dragging behaviour, you need instead to set an object as the web view's WebUIDelegate and implement the following delegate method:
‑webView:dragDestinationActionMaskForDraggingInfo:
You can then control how you want the web view to respond to the drag action. The WebUIDelegate protocol has several other methods to control dragging, so you should read the documentation for more detail.
To actually receive the dragged objects and process them, you will need to subclass WebView and implement ‑draggingEnded:.
You definitely do not need to add any dragging methods to the window itself.
I have a class that makes a keyboard toolbar which has "Next", "Previous", and "Done" buttons on it. Is there a way for this class to know (or find out) what objects are on the screen at any time?
E.g., can it see what the current view is and what the text fields on it are, and then be able to resign the first responder?
If you specifically want to resign first responder without the need to known which view is the first responder you can send resignFirstResponder to "nil" like this:
[[UIApplication sharedApplication] sendAction:#selector(resignFirstResponder) to:nil from:nil forEvent:nil];
This is documented behaviour although I cannot find in the docs right now.
Is there a way for this class to know
(or find out) what objects are on the
screen at the time?
Find the momma view and you can iterate through all the objects on the screen (because they will be UIViews too) like this. Note that you may need to add recursion:
for (UIView *view in mommaView.subviews) {
do something to the view
}
You can start at the Window class and go down from there, asking [view respondsTo:#selector(isFirstResponder) && [view isFirstResponder] on each. Some debugging code that I use might come in handy as a template and also while debugging:
+ (void) dumpWindowFrom:(NSString *) fromText {
[self dumpViews:[[UIApplication sharedApplication] keyWindow] from:fromText];
}
void dumpViewsRecursive(UIView* view, NSString *text, NSString *indent)
{
Class cl = [view class];
NSString *classDescription = [cl description];
// while ([cl superclass]) //restore to print superclass list
// {
// cl = [cl superclass];
// classDescription = [classDescription stringByAppendingFormat:#":%#", [cl description]];
// }
if ([text compare:#""] == NSOrderedSame)
NSLog(#"%d: %# %# %#", (int)view, classDescription, NSStringFromCGRect(view.frame), view.hidden ? #"Inv" : #"Vis");
else
NSLog(#"%d: %# %# %# %#", (int)view, text, classDescription, NSStringFromCGRect(view.frame), view.hidden ? #"Inv" : #"Vis");
for (NSUInteger i = 0; i < [view.subviews count]; i++)
{
UIView *subView = [view.subviews objectAtIndex:i];
NSString *newIndent = [[NSString alloc] initWithFormat:#" %#", indent];
NSString *msg = [[NSString alloc] initWithFormat:#"%#%d:", newIndent, i];
dumpViewsRecursive (subView, msg, newIndent);
[msg release];
[newIndent release];
}
}
+ (void) dumpViews: (UIView *) view {
dumpViewsRecursive (( (!view) ? [[UIApplication sharedApplication] keyWindow] : view), #"" ,#"");
}
+ (void) dumpViews: (UIView *) view from:(NSString *) fromText{
dumpViewsRecursive ((!view) ? [[UIApplication sharedApplication] keyWindow] : view, fromText, #"");
}
yes, the methods provided below will be called whenever a textField becomes Active. I think you are looking for
- (BOOL) textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return 1;
}
or
- (void) textFieldDidBeginEditing:(UITextField *)textField
{
[textField resignFirstResponder];
}
- (void) textFieldDidEndEditing:(UITextField *)textField
{
[textField resignFirstResponder];
}
and if you are looking for a specific textField in your view, you should assign them tags:
textField.tag =1 // for textField 1
textField.tag =2 // for textField 2
// You may check for these tags and then resign specific ones.