I am using TTTableViewController class. I have added the UIView of height 100 to the Table cell initially. The height of UIView changes dynamically and I have to change the height of cell also. But height of the cell doesnt chnages. please remember I am ?Using Three 20. Thanks in advance for valuable response.
Have you Enabled this while creating row Dynamically??
BOOL variableHeightRows = YES
You can refer this link, hope it may help you. :))
Or try this :-
-(CGFloat)tableView :(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
// return (the value for the row)
}
but for this you must implement its Delegate i.e. UITableViewDataSource.
use the below delegate method to adjust table row height.
-(CGFloat)tableView :(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 50; //the required table row height
}
For TTTableViewCell
do it in didLoad or init method
self.variableHeightRows = YES;
and use the below function.
+ (CGFloat)tableView:(UITableView*)tableView rowHeightForObject:(id)object;
{
return 80; //value can be changed
}
Related
I have a UITableView with 4 UILabel's: Title, Body, Author and Date, he looks like this:
What I want to accomplish is, when user click on the cell itself, another label should be added to the cell, the "Body" label and the cell should expand according to this label size.
Something like this:
How can I do that? I've searched stackoverflow, tried some code pieces, but still didn't found the right solution.
Thanks!
Edit 1: 14.11.12 at 14:52
I managed to change the size of the UILabel with the current text:
- (CGRect )resizeLabelByFontSize:(UILabel *)customCellLabel withMaxHeightSize:(CGFloat )maxHeight
{
CGSize maximumLabelSize = CGSizeMake(239, maxHeight);
CGSize expectedLabelSize = [customCellLabel.text sizeWithFont:customCellLabel.font constrainedToSize:maximumLabelSize lineBreakMode:customCellLabel.lineBreakMode];
//adjust the label the the new height.
CGRect newFrame = customCellLabel.frame;
newFrame.size.height = expectedLabelSize.height;
return newFrame;
}
But how can I change the size of the cell according to the size of the new UILabel?
By seeing Images in Question
Here is the method which just create the Dynamic FRAME for UILabel have a look at this
By getting the Height and Width for UIlabel you can calculate the Whole height and could set the Row Height of UITableView.
- (void)setLabeltextWithVerticalAlignTop:(NSString *)theText
{
CGSize labelSize;
// here labelSize is hard-wired but could use constants to populate the size
labelSize = CGSizeMake(210, 129);//this is just for example
//now create the Size from textString SO that We could assign this size to the Label.
CGSize theStringSize = [theText sizeWithFont:lblTitle.font constrainedToSize:labelSize lineBreakMode:lblTitle.lineBreakMode];
lblTitle.frame = CGRectMake(lblTitle.frame.origin.x, lblTitle.frame.origin.y, theStringSize.width, theStringSize.height);
lblTitle.text = theText;
}
Call Above Method For setting the height and Width of description Label you need to pass the text to be shown on that description label.
As you gets the height for that Label, Now On the Basis of this You can Adjust the heigh of Row of TableView.
EDIT:Above Code Just Create the Dynamic Frame For The UILabel
You should take a view of this this is what you looking for....!!!.here you would find a sample code too.
EDIT:As you edited your Question see ,it just the logic which you need to convert it into runnable code here it is.
Use Below Method in Your Code called for each row, and make some calculation inside it.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
CGFloat rowHeight=0.0;
//here it seems cell have 4 subview added on it.
//so if you could calculate the totla hieht of them.
//so what you really need to do.you just use hieght calculative Method for getting hieght of each of three UILabel
//you need to modify `setLabeltextWithVerticalAlignTop` method .
rowHeight= [self setLabeltextWithVerticalAlignTop:#"pass the correspondingText"];// suppose it returns some hieght for FisrtLabel.
//suppoose here you get the 20.0 height here
rowHeight= rowHeight+[self setLabeltextWithVerticalAlignTop:#"pass the correspondingText"];
// suppose it returns some hieght for secondUIlabel.
//suppoose here you get the 40.0 height here
rowHeight= rowHeight+ [self setLabeltextWithVerticalAlignTop:#"pass the correspondingText"];
// suppose it returns some hieght for ThirdUIlabel.
// suppoose here you get the 15.0 height here
//here you have totla height you just need to add some gapping floating value for all of three UIlabel.so that the could not overlap like as.
rowHeight= rowHeight+20.0;
//now you can return that total height
return rowHeight;
}
Note:This is just logic you need to convert it into runnable code.i am sure this can help.
I hope it may help you.
Implement the following methods
– (void) tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
// cast cell, add label, expand labels etc
[tableView reloadRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return [indexPath isEqualTo:[tableView indexPathForSelectedRow]] ? /* expanded height */ : 80 /* normal height */;
}
If you want the row to stay selected even after another row is selected then add a custom BOOL property to your custom cell, e.g. expanded, and use that to determine the height.
You can use tableView:didSelectRowAtIndexPath
In that method you can then create your code to unhide the body label, adjust the relative positions of everything else. Calculate the new height of the row and then call the Table View's reloadRowsAtIndexPath: withRowAnimation: method.
Sorry if there's not a lot of detail in that, but hopefully that should get you on the right track.
Ok, firstly... To expand you need something like this:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
Now here is the catch:
You should calculate the size of the UITableViewCell (expanded and non-expanded)
Doing so when you are actually scrolling might be expensive and will give you a bad experience
My advice:
Calculate both sides, before you have actually conclude to build the UITableView, since you want to have dynamic sizes. If you don't and all cells will have the same size expanded, you can use what lammmert said.
NSIndexPath *selectedRow;
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
selectedRow = indexPath;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
if(indexPath == selectedRow){
//return your custom value
}
return 100;
}
I think it will look something like that
So, in order to do this, using expended UITableViewCell, i've created 2 different custom cells, at start the table is showing the first cell, when I click on the cell, the table is showing the second one. Its that easy - yeah!
So I have the UIViewController with the UITableView that implements the table delegate methods:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if([self.selectedCellIndexPath isEqual:indexPath])
{
return [self expandedCellHeight:indexPath];
}
else
{
return kRegularCellHeight;
}
}
-(CGFloat)expandedCellHeight:(NSIndexPath *)indexPath
{
CGSize maxSize = CGSizeMake(303, 200);
NSString* bodyText = [[self.data objectAtIndex:indexPath.row] objectForKey:kForumMessagesBody];
CGSize fitSize = [bodyText sizeWithFont:[UIFont systemFontOfSize:13] constrainedToSize:maxSize lineBreakMode:UILineBreakModeWordWrap];
CGFloat height = 384 - 69 + fitSize.height;
NSLog(#"expandedHeight: %f",height);
return height;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Answer cell
if ([self.selectedCellIndexPath isEqual:indexPath])
{
cell = [tableView dequeueReusableCellWithIdentifier:[ForumCell expandedAnswerReuseIdentifier]];
if (cell == nil)
{
cell = [ForumCell expandedAnswerCell];
}
self.expandedCell = cell;
}
else
{
cell = [tableView dequeueReusableCellWithIdentifier:[ForumCell reqularAnswerReuseIdentifier]];
if (cell == nil)
{
cell = [ForumCell regularAnswerCell];
}
}
cell.labelMedia.text = [self.data objectAtIndex:indexPath.row];
return cell;
}
I also have custom cell, the class called ForumCell.h and ForumCell.m and it has 2 different XIB files: ForumRegularAnswerCell.xib and ForumExpandedAnswerCell.xib, I have the following code inside ForumCell.h:
+ (NSString*)reqularAnswerReuseIdentifier
{
return #"RegularAnswerCellReuseIdentifier";
}
+ (NSString*)expandedAnswerReuseIdentifier
{
return #"ExpandedAnswerCellReuseIdentifier";
}
+ (ForumCell*)regularAnswerCell
{
NSArray* objs = [[NSBundle mainBundle] loadNibNamed:#"ForumRegularAnswerCell" owner:self options:nil];
ForumCell* result = [objs objectAtIndex:0];
return result;
}
+ (ForumCell*)expandedAnswerCell
{
NSArray* objs = [[NSBundle mainBundle] loadNibNamed:#"ForumExpandedAnswerCell" owner:self options:nil];
ForumCell* result = [objs objectAtIndex:0];
return result;
}
- (id)initWithCoder:(NSCoder *)decoder
{
self = [super initWithCoder:decoder];
if (self)
{
_originalCellHeight = self.frame.size.height;
_originalLblBodyHeight = self.lblBody.frame.size.height;
}
return self;
}
You can also use more than 2 xibs if you'd like its up to you. but this is the basics.
Enjoy!
I creating the one UITable view with the 2 sections in with when i load the data into the uitablew it's working fine,
But my problem is how to resolve one sorting button is disable in section 0 and row 0
which more discribe into the following image.
please help to solve my problem
in advance thanking to your valuable time spend on my problem.
It's quite easy.
Listen on the UITableViewDataSource call tableView:canMoveRowAtIndexPath:
Like this:
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
if(indexPath.section == 0) {
return NO;
}
return YES;
}
If you don't not where to place the method, place it next to tableView:cellForRowAtIndexPath:
Set showsReorderControl to NO property of cell
cell.showsReorderControl = NO;
In addition, if the data source implements tableView:canMoveRowAtIndexPath: to return NO, the reordering control does not appear in that designated row. You need to check indexPath and return NO for it.
Two UITableViewCell related questions:
In my custom UITableViewCell I loop through an array (of which I do not know how many objects it holds) and add a UILabel displaying some text for each object in that array.
This means I have to adjust the height of the cell so that these labels fit in. How can I do this?
When going into edit mode, I have the cells indent, however I do not want this. I have tried the following:
cell.shouldIndentWhileEditing = NO;
and
-(BOOL)tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath
{
return NO;
}
Both sadly failed, I have I no idea why. How could I possible remedy this?
Any help is much appreciated with either of these issues, thanks.
You can specify the height for every row with the delegate method [UITableViewDelegate tableView:heightForRowAtIndexPath:].
Just change what the method returns and the reload your table.
This method actually has nothing to do with the indendation of cell content:
Asks the delegate whether the background of the specified row should be indented while the table view is in editing mode.
You can try to set indentationWidth but I never managed to make it work.
Fortunately, it's easy to change everything you want in [UITableView layoutSubviews] method.
Example:
- (void)layoutSubviews {
[super layoutSubviews];
self.contentView.frame = self.bounds;
}
You may also need to set
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath;
{
return UITableViewCellEditingStyleNone;
}
For the dynamic height part there are plenty of other answers and a quick google found a tutorial here
how to make the first three row height should be 60 and remaining row height should be 25 in UITableView.
How can i do this?
Thanks.
Check out this link you can get the idea how we have to do it
different-height-for-alternative-cell-in-uitableview
or you can use the below delegate function
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row < 3)
{
return 60;
}
else
{
return 25;
}
}
HAppy Coding...
I am setting the row height of my UITableView using following code
[tableView setRowHeight: 100.00];
I am using the single line as separator in the UITableView.
Eventhough setting the height above, height of row does not get change.
You should implement
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
delegate method. and return 100.0 there.
You should avoid the heightForRowAtIndexPath if all your rows are of similar height and use the rowHeight property. According to the documentation:
There are performance implications to using tableView:heightForRowAtIndexPath: instead of rowHeight. Every time a table view is displayed, it calls tableView:heightForRowAtIndexPath: on the delegate for each of its rows, which can result in a significant performance problem with table views having a large number of rows (approximately 1000 or more).
In the UITableViewController subclass it could be done, for instance, in the viewDidAppear method (the UITableViewController has a reference to the tableView):
self.tableView.rowHeight = 79.f;
The row height is baked into the cells when they are first displayed.
Did you set UITableView#rowHeight before setting the data source?
If not, do so.
If for whatever reason you can't, your other option is to call UITableView#reloadData after setting the row height.
I did like this, here tableobj is nothing but UITableView object in my application.
- (void)viewDidLoad
{
[super viewDidLoad];
[tableObj setRowHeight:100.0f];
}
Or handle it in numberOfRowsInSection: like:
- (NSInteger)tableView:(UITableView *)tblView numberOfRowsInSection:(NSInteger)section {
[tableObj setRowHeight:100.0f];
return [soandso count]; // soandso is my object
}
Because set the rowHeight before setting the data source. It worked for me (for equal row heights).
The better and cleaner solution is to implement the delegate function (Maybe not the best one if your UITableView has many rows ...).
Also, think that UITableVieCell are UIView so you could change their height firstly...
Delegates are very powerful in iPhone dev, here the UITableViewDelage:
http://developer.apple.com/iphone/library/documentation/uikit/reference/UITableViewDelegate_Protocol/Reference/Reference.html
You can also change the indentForRow, displayCellForRow, heightForRow,edit stuff .....
I dont think there is such a method in UITableView...
Instead you can use the property rowHeight...
Try,
tableView.rowHeight =100;