Add a UITableViewControler to a UIView - objective-c

I am writing an appcelerator module, which means I am handed a subclassed UIView to work with and create my visual controls in Objective C.
I am trying to add a tableview with a searchbar, but most samples online use rootViewController and UITableViewControler.
so...in order to add a tableview to the current view, do I need to create a tableview and a UITableViewController and add them somehow as subviews to the current view ?
I tried adding a MainViewController.h & MainViewController.m which is defined as
#interface MainViewController : UITableViewController <UISearchDisplayDelegate, UISearchBarDelegate>
and then in my view
#import "MainViewController.h"
- (void)viewDidLoad
{
mainView = [[MainViewController alloc] init];
[self addSubview:mainView.view];
}
-(void)frameSizeChanged:(CGRect)frame bounds:(CGRect)bounds
{
if(CGRectIsEmpty(self.frame))
{
self.frame = bounds;
[self addSubview:mainView.view];
}
}
but it did not work, I just got an empty view. any ideas ? a sample code would be greatly appreciated
thanks

You could try something like this:
- (void)viewDidLoad {
self.view.backgroundColor=[UIColor whiteColor];
UITableView *TableListView=[[UITableView alloc] initWithFrame:CGRectMake(-5,-1,331,425) style:1];
TableListView.editing=NO;
TableListView.delegate=self;
TableListView.dataSource=self;
TableListView.separatorColor=[UIColor colorWithRed:0.000000 green:0.591928 blue:1.000000 alpha:1.000000];
TableListView.separatorStyle=1;
TableListView.rowHeight=40;
TableListView.tag=0;
TableListView.backgroundColor=[UIColor groupTableViewBackgroundColor];
TableListView.clipsToBounds=YES;
[self.view addSubview:TableListView];
[TableListView release];
}
Hope this helps get you started...

Related

How to create a custom NSView for NSSavePanel in Cocoa MacOS objective C?

I need to add a save extension selector with a text label next to it to my NSSavePanel. In the screenshot attached I try to demonstrate that I succeeded in adding an NSComboBox to my panel with the function setAccessoryView. However I have no idea how to create a custom NSView, which includes both an NSComboBox and an NSTextView or equivalent. I found no tutorials on the internet (or if I found one it was extremely outdated) showing how to create custom NSViews in objective-C in Cocoa on MacOS.
How can I create a custom NSView containing a combobox and a text label? Or how can I add two "stock" NSViews to the same NSSavePanel? Please be as detailed in your answer as possible, as I have very limited objective-c experience.
You asked how to create an NSView in Objective-C with an NSTextField and an NSComboBox as subviews.
Basically, you could define them in Interface Builder and programmatically set the resulting view in Objective-C as the accessoryView of the NSSavePanel. Alternatively, the custom NSView could be created entirely in Objective-C, which is probably the easier option here.
After instantiating an NSView, you can use addSubview: to add an NSTextField and an NSComboBox accordingly. Then you can use NSLayoutConstraints to set up Auto Layout, which takes care of sizing the accessoryView and arranging the subviews properly based on the width of the dialog.
If you create the views programmatically and use Auto Layout, you must explicitly set translatesAutoresizingMaskIntoConstraints to NO.
Should you want to set the allowedContentTypes, a textual mapping of the displayed extension to UTType via a NSDictionary might be useful.
If you set the delegate of the NSComboBox to self, then you will be informed about changes of the user selection in the NSComboBox via comboBoxSelectionDidChange:.
If the things discussed are implemented appropriately in code, it might look something like this for a self-contained example:
#import <UniformTypeIdentifiers/UniformTypeIdentifiers.h>
#import "ViewController.h"
#interface ViewController () <NSComboBoxDelegate>
#property (nonatomic, strong) NSSavePanel *savePanel;
#property (nonatomic, strong) NSDictionary<NSString *, UTType*> *typeMapping;
#end
#implementation ViewController
- (instancetype)initWithCoder:(NSCoder *)coder {
if (self = [super initWithCoder:coder]) {
_typeMapping = #{
#"jpeg": UTTypeJPEG,
#"png": UTTypePNG,
#"tiff": UTTypeTIFF
};
}
return self;
}
- (NSView *)accessoryView {
NSTextField *label = [NSTextField labelWithString:#"Filetypes:"];
label.textColor = NSColor.lightGrayColor;
label.font = [NSFont systemFontOfSize:NSFont.smallSystemFontSize];
label.alignment = NSTextAlignmentRight;
NSComboBox *comboBox = [NSComboBox new];
comboBox.editable = NO;
for (NSString *extension in self.typeMapping.allKeys) {
[comboBox addItemWithObjectValue:extension];
}
[comboBox setDelegate:self];
NSView *view = [NSView new];
[view addSubview:label];
[view addSubview:comboBox];
comboBox.translatesAutoresizingMaskIntoConstraints = NO;
label.translatesAutoresizingMaskIntoConstraints = NO;
[NSLayoutConstraint activateConstraints:#[
[label.bottomAnchor constraintEqualToAnchor:view.bottomAnchor constant:-12],
[label.widthAnchor constraintEqualToConstant:64.0],
[label.leadingAnchor constraintEqualToAnchor:view.leadingAnchor constant:0.0],
[comboBox.topAnchor constraintEqualToAnchor:view.topAnchor constant:8.0],
[comboBox.leadingAnchor constraintEqualToAnchor:label.trailingAnchor constant:8.0],
[comboBox.bottomAnchor constraintEqualToAnchor:view.bottomAnchor constant:-8.0],
[comboBox.trailingAnchor constraintEqualToAnchor:view.trailingAnchor constant:-20.0],
]];
return view;
}
- (void)comboBoxSelectionDidChange:(NSNotification *)notification {
NSComboBox *comboBox = notification.object;
NSString *selectedItem = comboBox.objectValueOfSelectedItem;
NSLog(#"### set allowedContentTypes to %# (%#)", selectedItem, self.typeMapping[selectedItem]);
[self.savePanel setAllowedContentTypes:#[ self.typeMapping[selectedItem] ]];
}
- (IBAction)onSave:(id)sender {
NSWindow *window = NSApplication.sharedApplication.windows.firstObject;
self.savePanel = [NSSavePanel new];
self.savePanel.accessoryView = [self accessoryView];
[self.savePanel beginSheetModalForWindow:window completionHandler:^(NSModalResponse result) {
if (result != NSModalResponseOK) {
return;
}
NSURL *fileURL = self.savePanel.URL;
NSLog(#"### selectedFile: %#", fileURL);
}];
}
- (void)setRepresentedObject:(id)representedObject {
[super setRepresentedObject:representedObject];
}
#end
Finally, a screenshot of the above demo code in action looks like this:
Press Cmd-N to add a new file to your project. Choose a View file to add a xib file that has a custom view.
Open the xib file and add the controls to the custom view. Press the Add button in the project window toolbar to access the user interface elements.
Use the NSNib class to load the xib file and get the custom view.

UISwipegesturerecognizer to change ImageView positions on the view controller?

I'm an Objective-C beginner and I've found similar answers on stackoverflow to my question, but even after trying all of the tips/advice I'm still lost.
I have an IBOutlet UIImageView, and I want it to be so that if the user swipes up or down on this Image, then the position of various images on the view controller change.
I'm very green with the UISwipegesturerecognizer coding, so please explain in a way a beginner would understand. Thank you very much in advance!!!
UPDATE:
#Axeva, I used the following code, and there are no caution warnings or errors. However, it isn't executing properly on my simulator. Here is my code :
interface math0 (){
UISwipeGestureRecognizer *swipeUp;}
- (void)viewDidLoad
{
[super viewDidLoad];
swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget: self action: #selector(swipedScreenUp:)];
[swipeUp setNumberOfTouchesRequired: 1];
[swipeUp setDirection: UISwipeGestureRecognizerDirectionUp];
[one addGestureRecognizer: swipeUp];
[swipeUp setEnabled: NO];
}
- (void)swipedScreenUp:(UISwipeGestureRecognizer*)swipeGesture {
// Sampling to see if it works
instructions.text = [NSString stringWithFormat:#"IT WORKED!"];
}
In my .h file, I declared - (void)swipedScreenUp:(UISwipeGestureRecognizer)swipeUp;. On my storyboard, I set my image (named one) so that it was accessibility and user interaction enabled.
I've also tried with [swipeUp setEnabled: YES]; in my viewDidLoad file.
Can you or anyone tell me where the error is? Thank you!!
Try something like this:
#interface YourViewController () {
UISwipeGestureRecognizer *swipeLeftToRightGesture;
}
- (void)viewDidLoad {
[super viewDidLoad];
swipeLeftToRightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget: self action: #selector(swipedScreenRight:)];
[swipeLeftToRightGesture setNumberOfTouchesRequired: 1];
[swipeLeftToRightGesture setDirection: UISwipeGestureRecognizerDirectionRight];
[[self view] addGestureRecognizer: swipeLeftToRightGesture];
}
- (void)swipedScreenRight:(UISwipeGestureRecognizer*)swipeGesture {
// Move your image views as desired
}
You can adjust this basic code to do exactly what you wish. (different swipe directions; etc.)

Xcode UIView and subviews

first of all, I am beginner with xcode and programming in Objective-c. I made my app with navigation bar and I have UIView with class Lesson1 and I added new subview Level1 but I dont wanna add new class. Is it any solution how add label to subview Level1 from class Lesson1.m?
Thank you
It is very easy to do so. Let's admit this is your Lesson1 view code. In the viewDidLoad method you can add whatever you want.
- (void)viewDidLoad
{
UIView *level1 = [[UIView alloc] initWithFrame:CGRectMake(x,y,width,height)];
[self.view addSubview:level1]
UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(label_x,label_y,label_width,label_height)];
label1.text = #"labeltext";
[level1 addSubview:label1]
}
Yes, you can.
Programmatically:
// viewDidLoad method from Lesson1 class
- (void)viewDidLoad
{
self.level1 = // Your UIView
[self.view addSubview:self.level1]
[self.level1 addSubview:yourLabel]
}
Using XIB file for Lesson1:
Drag and drop an UILabel into your Lesson1 and link the UILabel with an IBoutlet on your Lesson1 class.
Use below link. It might be helpful for you!!
http://www.techotopia.com/index.php/An_iOS_7_Core_Data_Tutorial

Can't set a label in a view

I have the following situation. I have a view controller (ContentController) with 3 buttons at the top. Below I added a second view (contentView), this view should display content that are behind those 3 buttons. So every time I press a button, the contentView changes. So what I did was created three addition controllers.
FirstController.m, FirstController.h, FirstController.xib
SecondController.m, SecondController.h, SecondController.xib,
ThirdController.m, ThirdController.h, ThirdController.xib,
in my ContentController.m I added 3 IBActions that handles the change.
#interface ViewController ()
#property (nonatomic,strong) UIViewController *nextController;
#end
#implementation ViewController
#synthesize nextController = _nextController;
-(IBAction)chooseFirstController:(id)sender {
_nextController = [[FirstController alloc] initWithNibName:#"FirstController" bundle:nil];
[self.contentView addSubview:_nextController.view];
}
-(IBAction)chooseSecondController:(id)sender{
_nextController = [[SecondController alloc] initWithNibName:#"SecondController" bundle:nil];
[self.contentView addSubview:_nextController.view];
}
-(IBAction)chooseThirdController:(id)sender{
_nextController = [[ThirdViewController alloc] initWithNibName:#"ThirdViewController" bundle:nil];
[self.contentView addSubview:_nextController.view];
}
My first and ThirdController just showing tableviews inside the contentView of contentController. But in my secondController I used a gridView for displaying items. Now when I press a cell, it should go to a detailViewController, whichs shows more information about that cell. So in my cellForRowAtIndex I did the following.
- (void)gridView:(NRGridView *)gridView didSelectCellAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"cell clicked");
PlayerDetailController *playerController = [[PlayerDetailController alloc]initWithNibName:#"PlayerDetailController" bundle:nil];
[playerController setLblTest:#"hooray this works"];
[self.view addSubview:playerController.view];
}
It correctly executes setLblTest and also showing the detailViewcontroller inside my ContentView. But it don't changes the label. to my #"hooray" this works. But although as you can see in my log it passes it correctly.
#synthesize testLabel = _testLabel;
#synthesize lblTest = _lblTest;
-(void)setLblTest:(NSString *)lblTest{
if(![_lblTest isEqual:lblTest]){
_lblTest = lblTest;
}
NSLog(#"log komt %#",lblTest);
[_testLabel setText:lblTest];
}
LOG
RacingGenk[567:c07] log komt hooray this works
Hope this clarifies more my problem
Thank you
To get the label to update, you'll need to change your code to look like this.
self.testLabel.text = lblTest;

Problems with storyboard

recently I started using storyboard and I've the following situation: I want to set the text of an UILabel from the AppDelegate. So I created an instance of my ViewController
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"MainStoryboard"
bundle: nil];
ViewController *controller = (ViewController*)[mainStoryboard
instantiateViewControllerWithIdentifier: #"mainViewController"];
myViewController = controller;
[window addSubview:myViewController.view];
[window makeKeyAndVisible];
and called the following method from the delegate
- (void) updateParameterLabel:(NSString *)parameter {
NSLog(#"URL-2: %#", parameter);
parameterLabel.text = parameter;
}
But the parameter is not shown in the UI.
Another think, which is kind of strage:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
NSLog(#"View did Appear");
}
The "View did appear" is logged twice ...
Any hints?
Regards,
Sascha
Setting the text of a UILabel from your application delegate isn't great design. Your view controllers should be managing the content of your views, hence their name. Typically your storyboard is instantiated automatically, and you don't need any of the storyboardWithName et code you've got, assuming you're working with Apple's default templates.
Maybe think about re-architecting your application to follow the 'model-view-controller' pattern more strictly, and also look at how Apple instantiate storyboards automatically (just create a new storyboard project in XCode to see this).
If you still want to make it work, make the UILabel a property of your viewcontroller and set the label by using
In delegate :
- (void) updateParameterLabel:(NSString *)parameter {
NSLog(#"URL-2: %#", parameter);
[myViewController updateParemeter:parameter];
}
In myViewController:
- (void) updateParameterLabel:(NSString *)parameter {
NSLog(#"URL-2: %#", parameter);
parameterLabel.text = parameter;
[self.view setNeedsDisplay];//edit
}
So use the viewController to update your label. Of course you need the label as a property in your viewController
For what I see you are trying to update the label before it appears, so why don't you try calling your updateLabel method in the viewWillAppear, it would be something like this
-(void)viewWillAppear:(BOOL)animated{
[self updateParameterLabel:#"Some Text"];
[super viewWillAppear:YES];
}
And updateParameterLabel has to be implemented in the viewController.