Here I have a picker with a Textfield above;however,these non-selected data row will cover my textfield lead me into the situation of unable to click the textfield to input data, thus I'd like to reduce the number of non-selected row appearance.Yes indeed I could lift up the position of textfield,but the visual effect will be unbalanced.Is any other way to go?
Related
Can a cell other than the cell containing the formula be the target of the results of a formula? If so, how?
I have a large array of Checkbox cells. I use the state of the Checkboxes as references for calculations. Once I have completed that calculation a large number Checkboxes have been selected. I'm looking for a way to reset the Checkboxes to a default state. Resetting them manually can be tedious.
My current thought is to mirror the array, fill it with the default values, and somehow map those to the array of Checkboxes. Here is the rub.
As far as I know, the results of a formula are always in the cell in which the formula appears.
A cell containing a Checkbox cannot contain a formula.
I can use INDIRECT() to Gather the contents of a cell but I haven't seen anything that permits me to indirectly Place a value in a cell.
Anyone have a clue as to how I can indirectly put a value into a cell?
I have a collection view with many different cells in it. Each cell takes up half the width of a page, and contains an image and a label under the image.
I am starting with all of the labels being truncated, along with a "Read More" button that is supposed to expand the label.
The code to do the expanding is working, but the problem is that if I click the button on a cell in the top row, and the 2nd row also has 2 cells in it, I need those 2 cells to move down the page when I click the button as well. Right now, the text is technically "expanding" but then just being truncated due to having no height left.
I believe I need some sort of invalideLayout combination with something else to make this happen, but I can't seem to piece together how I would force all of the cells to move downwards as well.
The "Read More" button is attached to a function call that updates the number of lines for that text from "3" to "0" and reloads that cell.
Thanks in advance!
my collection view cell is full size..i have collection view cell and it contains button..i successfully display all button with it's title in collection view cell. but i am having one issue that some button title is too large..i want to change it's widht based on text...how to set button width based on text..i have vertical collection view
my array is
var arr = ["butto1 butto1 butto1","butto1 butto1butto1butto1","butto1","butto1 butto1butto1butto1"]
I have searched so many time but still i haven't point out
...any on help me..Thank you
You haven't given much information that would help in diagnosing your problem.
The button should automatically resize to fit the text unless you have set constraints that stop it from growing.
If you have set a left and a right constraint to equal a constant then it will not be able to grow.
As far as I can tell, you have two options.
Only set 3 out of 4 constraints. For example the following image has 3 constraints set which allow the button to grow downwards.
Set the right constraint to "Greater than or equal to" instead of "equal" in the interface builder. This will allow the button to grow to a maximum size which is specified by the constraints.
Also make sure to set your button to word wrap so that text continues on the next line.
I would like to build a TableView where when the user clicks on a cell it expands to show more information. My question is how do I use Autolayout to arrange the multiple items in each cell.
Each cell will always be the same size, whether it is collapsed or not, so the sizing isn't dynamic.
The first problem I have is how to use Autolayout to arrange all the items in the cell. Before Xcode 7 I was successfully using Autolayout where I would pick a label-button-view to arrange, click Editor > Align > Trailing/Leading/Top Space, to.. etc. This is now greyed out and I don't know how to replace my old strategy.
Each cell has two rows of items. The first row shows all the time, the second only shows on collapse. Below is a picture of how the cell will look when it is collapsed:
The first row is a bit trickier because outlet1 and outlet 2 will have variable sizes. I would like 'label' to come right after label1, no matter how long or short that outlet happens to be. As arranged currently, there is a variable amount of space between the two.
What I'm looking to achieve in row 1 is basically exactly like Venmo:
Notice how 'paid' conforms to the size of the two names in the first row.
The second row has two buttons and an outlet which will always be the same size.
To sum up - how can I layout these elements in the UITableView for iphones4 thru 6S - and then how do I make this cell a collapsible cell? The construction of these cells seem to work as a system, not isolated from the whole - which is why this is a 2-part question.
is this what you want to achieve?
I have a set of 100 rows, pretty similar to values which can be selected in a picker. When the user scrolls the table, I want the rows to be appended like an forever-ongoing assembly-belt. So when the user scrolls down and reaches the row 100, and scrolls even further, the table view will show again row 1, and so on. Reverse direction same thing.
My thoughts:
don't display scroll indicators (they would make not much sense, probably)
what value to return in the numberOfRows delegate method? This infinity constant?
in cellForRowAtIndexPath: simply wrap the index around when it exceeds bounds?
Many apps do this. The idea is that the beginning of the table is always the same, but you keep adding to the end, so the table just keeps growing.
Let's say you first have 100 data elements. Your numberOfRows returns 101 then. First 100 cells are normal. And scroll indicators still make sense.
If the 101st cell is displayed, you display a progress indicator like UIActivityIndicator in the cell, and initiate the process to load next 100 rows. When the data arrives, you either reload the whole table with UITableView reloadData, or you insert new cells individually with UITableView insertRowsAtIndexPaths:withRowAnimation:.
So, you just keep infinitely appending to the table. This is easier than trying to keep the table as a "window" that is always at N cells/rows and unload from the beginning of the table. If you need this sort of window, you may reconsider if this is really the best way to interact with your data.
I just finished implementing a variation of this.
Lets assume you have a 100 rows and 8 of them fit in a screen. Start by adding the last 8 rows first, then the 100 rows normally and then the first 8 rows at the end. Recenter the tableview by using setContentOffset to the first row of the 100.
When the user scrolls below the 100th one he will see rows 1-8, you can detect this in the viewDidScroll delegate function and recenter the scroll back to the first record (ensure u set the animated flag to NO when you do this). Similarly when the user scrolls past 1, he/she will see the last 8 records, you can again recenter the scroll view to show the last 8 records in the 100 row section.
This actually implements circular scrolling and the user can keep scrolling in both directions.
I haven't tried this but here's an idea. Let's say N = 100, since you have 100 rows. What we'll do is tell the tableview we have 200 rows, but we'll keep the user scrolling in the range 50-150.
Tell (the tableview) that you have double that number of rows, so for numberOfRows, return 2*N. In cellForRowAtIndexPath, always return the cell corresponding to (row % N).
Now init the table scrolled to row N (instead of 0) so that the user can scroll in either direction.
As the user scrolls up the tableview will eventually ask for row N+(N/2), when that happens send a scrollToRowAtIndexPath:atScrollPositionanimated: to scroll to the row-N. That will reposition the table back by N (ie: from 150 to 50), same cell but we'll never run off the end of the table this way.
Do the same when the tableview asks for cell at row N-(N/2) for scrolling up.
You'll have to deal with the special case where N cells fits in the view with extra room, ie: what if N were 1?