I have problem with positioning the view at the very top of table view. I have UITableViewController inside the UINavigatonController. I add subview to it's view. I want the subview to be always at the top of the screen, at the same place where navigation bar is. If I setup top constraint which pins the top of the subview to the top of tableView, than it appears under the navigation bar, not at the very top of the screen. How to solve this problem? Here is the code and the picture:
#interface ViewController : UITableViewController
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UIView* redSquare = [[UIView alloc] initWithFrame:CGRectZero];
redSquare.backgroundColor = [UIColor redColor];
[self.view addSubview:redSquare];
[redSquare setTranslatesAutoresizingMaskIntoConstraints:NO];
[redSquare.topAnchor constraintEqualToAnchor:self.view.topAnchor].active = YES;
[redSquare.widthAnchor constraintEqualToConstant:100].active = YES;
[redSquare.heightAnchor constraintEqualToConstant:100].active = YES;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 5;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString* reuseIdentifier = #"ri";
UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
if (!cell)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
}
return cell;
}
#end
Related
In my ViewController I have a little UIView. How do I programmatically create a TableView instead of this "blue" UIView.
I have this code for my UIView.
self.viewForTableView = [[UIView alloc] initWithFrame:CGRectMake(self.view.frame.size.width/2,
self.navigationController.navigationBar.frame.size.height,
self.view.frame.size.width/2,
self.view.frame.size.height)];
self.viewForTableView.backgroundColor = [UIColor blueColor];
[self.view addSubview:self.viewForTableView];
That's how I would like to have it preview.
Swift
let tblVW:UITableView = UITableView(frame: viewForTableView.frame)
viewForTableView.addSubview(tblVW)
tblVW.delegate = self
tblVW.dataSource = self
Objective-c
UITableView *tblView = [[UITableView alloc]initWithFrame:viewForTableView.frame];
[viewForTableView addSubview:tblView];
tblView.delegate = self;
tblView.dataSource = self;
you need to implement following methods:
#pragma mark - Table View Data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return 0//number rows you want in table
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = #"cellID";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:
UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
return cell;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 2; //by default is 1
}
viewcontroller.h
#interface yourViewController ()<UITableViewDelegate,UITableViewDataSource>
{
IBOutlet UITableView *tbleView;
}
Viewcontroller.m
- (void)viewDidLoad {
[super viewDidLoad];
tbleView.delegate=self;//for delegate methods
tbleView.datasource=self;//for datasource methods
tbleView.backgroundColor=//yourColor
tbleView.frame=CGRectMake(//your frame);
[yourView addSubview tbleView];
}
I have table in main view. Next I added view to above table view with height 100 points, then I have first row with 100 points height. Next I check scrollView contentOffset to recalculate position of my added view. When I scroll my table view all fine, my view is duplicate position with my first cell in table view.
But I have problem is:
When I want to scroll from my view (finger in a view) and scroll down, table view is no interaction with my gestures. Yes, that normal. If I set user interaction to NO, all work fine. But I have some buttons in this view and when I disabled user interaction I can't have actions with my subviews in this view.
How I can scroll and tap simultaneously/together without user interaction or something else method. Thx.
All of code:
#import "ViewController.h"
#interface ViewController () <UITableViewDataSource, UITableViewDelegate>
{
UIView *someView;
}
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UITableView *tableView = [[UITableView alloc] initWithFrame:self.view.bounds];
tableView.dataSource = self;
tableView.delegate = self;
[self.view addSubview:tableView];
someView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 100)];
someView.backgroundColor = [UIColor redColor];
[self.view addSubview:someView];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return 10;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(nonnull NSIndexPath *)indexPath{
if (indexPath.row == 0) return 100;
else return 44;
}
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"Cell"];
if (indexPath.row == 0) cell.backgroundColor = [UIColor greenColor];
}
return cell;
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView {
someView.center = CGPointMake(someView.center.x, -scrollView.contentOffset.y+50);
}
Try to add button on main view
- (void)viewDidLoad {
[super viewDidLoad];
UITableView *tableView = [[UITableView alloc] initWithFrame:self.view.bounds];
tableView.dataSource = self;
tableView.delegate = self;
[self.view addSubview:tableView];
someView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 100)];
someView.backgroundColor = [UIColor redColor];
[self.view addSubview:someView];
UIButton *someBotton = [UIButton buttonWithType:UIButtonTypeCustom];
// button initialisation
...
[self.view addSubview:someBotton];
}
In this case table will not interact only below button
Second way is create subclass for someView and override method pointInside:
- (BOOL)pointInside:(CGPoint)point withEvent:(nullable UIEvent *)event{
for(UIView *subview in self.subviews){
if([subview pointInside:point withEvent:event]){
return YES;
}
}
return NO;
}
Hi I want to display images in UITableview and on top of uitableview I need transparent view.
What I have tried is :
Added view in storyboard and on top of it UITableView.
_vaultView.backgroundColor = [UIColor colorWithRed:26/255.0f green:188/255.0f blue:156/255.0f alpha:0.85f];
Ian unable to display transparent View.
Please suggest me how to proceed further.
edit:
- (void)viewDidLoad {
[super viewDidLoad];
_vaultView.backgroundColor = [UIColor colorWithRed:26/255.0f green:188/255.0f blue:156/255.0f alpha:0.85f];
UILabel *lblMySaved = [self createLabelWithTitle:#"Find all your saved work here" frame:CGRectMake(20,115,300,60) tag:1 font:[Util Font:FontTypeLight Size:18.0] color:[UIColor whiteColor] numberOfLines:0];
[_vaultView addSubview:lblMySaved];
_tblVault.separatorColor = [UIColor clearColor];
_tblVault.delegate = self;
_tblVault.dataSource = self;
_tblVault.scrollEnabled = NO;
[self refreshImages];
}
-(void)refreshImages
{
[aryVaultImages removeAllObjects];
NSArray *aryImages = [self getImagesfromDB]; // Retrieving image paths from DB
[_tblVault reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
return 2;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
{
return 40;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
{
static NSString *cellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
tableView.separatorColor =[UIColor clearColor];
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
if(indexPath.row ==0 && [aryImgPaths count])
{
NSLog(#"imagepath:%#",[aryImgPaths objectAtIndex:indexPath.row]);
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(5,5, 40, 40)];
[imageView setImage:[UIImage imageNamed:#"deletePost11.png"]];
[cell.contentView sendSubviewToBack:imageView];
[cell.contentView addSubview:imageView];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
From my understanding of your Views stack in your viewController, you simply need to move the transparent view to the front of the stack (it is currently at the back of your superView).
You can do this by calling.
[self.view bringSubViewToFront:<your transparent view>];
And in the storyboard just set the view to the correct values
If you want to hide the view just call
[self.view bringSubViewToFront:<your tableView>];
EDIT
To create a transparent view on top of you UITableView, you need to add a UIView in the storyBoard that is a subView of your viewController main view(then set all the attributes you want in the attributes inspector). Your tableView need to be also a subView of your viewController main view.
*make sure that the transparent view is front of the tableView in your storyBoard
In order to handle the gestures (because the transparent view is "blocking" the gestures from the tableView read this post Link)
tableView.backgroundColor = [UIColor clearColor];
tableView.backgroundView.backgroundColor = [UIColor clearColor];
- (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section{
if ([view isKindOfClass:[UITableViewHeaderFooterView class]])
{
UITableViewHeaderFooterView *headerView = (UITableViewHeaderFooterView *)view;
headerView.contentView.backgroundColor = [UIColor clearColor];
headerView.backgroundView.backgroundColor = [UIColor clearColor];
}
}
I have a UIScrollView which I want to be above my tableView. I put it as a subview of my tableview - when it is added the tableview is scrolled down to the relavent section using the tableView's contentOffset. When the scrollview is scrolled the tableView scrolls back up to the top.
How can I stop this from happening?
You must add instance of UIScrollView as subview of tableView cell.
E.g.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 30;}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 15) {
return 200;
}
return 44; }
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = #"Cell";
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
if (indexPath.row == 15) {
UIScrollView *scroll = [[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 200)] autorelease];
scroll.backgroundColor = [UIColor greenColor];
scroll.contentSize = CGSizeMake(self.view.frame.size.width, 500);
[cell addSubview:scroll];
}
return cell; }
Then you can set tableView's contentOffset in viewDidLoad
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.tableView.contentOffset = CGPointMake(0, 400); }
Also you can create custom cell with scrollView by subclassing UITableViewCell. Lear how to
customize tableView cells in this tutorial.
I am very new to Objective-C. I just searched and tried to learn about UITableView.
I have created this UITableView. instead of "a" in all the rows i want it to be in a sequence like "a b c d..." and if i increase the no of rows it should scroll. its not scrolling so here is my code.
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
CGRect frame = self.view.frame;
UITableView *tableView = [[UITableView alloc] initWithFrame:frame style:UITableViewStylePlain];
tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
tableView.backgroundColor = [UIColor cyanColor];
tableView.delegate = self;
tableView.dataSource = self;
[self.view addSubview:tableView];
[super viewDidLoad];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return 20;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"cellIDent"];
cell.textLabel.text = #"a";
return cell;
}
#end
set table view Delegates in IB or if u created Programmatically then in viewDidLoad Take one array fill it Dynamically or Statically.Give array count in NumberOfRowsInsection method and reload table view at appropriate place
in your cellForRowAtIndexPath: add these lines
char ch = 'a' + indexPath.row;
cell.textLabel.text = [NSString stringWithFormat:#"%c" , ch];
Check this tutorial, I'm sure it will help you
UItableView Guide
and for scrolling, You don't need to do anything yourselves, as the number of cells increases beyond the provided size, it automatically becomes scrollable and make sure that scrolling is enabled in your UITableView attribute inspector, check the image
Happy Coding
Regards
Use below code.....define alphabetarr in globally then use it in code...
- (void)viewDidLoad
{
alphabetarr = [[NSArray alloc] initWithObjects:#"a",#"b",#"c",#"d",#"e",#"f",#"g",#"h",#"i",#"j",#"k",#"l",#"m",#"n",#"o",#"p",#"q",#"r",#"s",#"t",#"u",#"v",#"w",#"x",#"y",#"z", nil];
CGRect frame = self.view.frame;
UITableView *tableview = [[UITableView alloc] initWithFrame:frame];
tableview.backgroundColor = [UIColor cyanColor];
tableview.separatorColor = [UIColor blackColor];
tableview.delegate = self;
tableview.dataSource = self;
[self.view addSubview:tableview];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [alphabetarr count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 30.0 ;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell!=nil) {
cell = nil;
}
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text = [alphabetarr objectAtIndex:indexPath.row];
return cell;
}