I am changing a value with UISlider and this value is the number of my PDF pages , so when users sliding they can navigate through the pages , because of tiles rendering I need set continuous property to NO, also I need a live page counter that uses with the same slider, so the property should be YES :, how can I set the property yes or no for specific codes with the same slider ?
this part , the property should be NO
navSlider.continuous = NO;
pageInt = CGPDFDocumentGetNumberOfPages(pdfscroll.pdf);
prgress = (int)(navSlider.value + 0.5);
navSlider.maximumValue = pageInt;
navSlider.minimumValue = 1;
[bookController moveToPage:prgress];
and here yes :
navSlider.continuous = YES;
NSString *numberOfPage = [NSString stringWithFormat:#"%d of %d",prgress,pageInt];
pageCounter.text = numberOfPage;
You clearly do need to know about every slider change, so it must be continuous. However, you should not call [bookController moveToPage:prgress]; after every single slider movement. The solution is to update the page number for every slider movement, but only call [bookController moveToPage:prgress]; when the slider is released.
Related
I want to make a gui that show your coordinates in game with text labels but my script seems didn't change the text at all
players = game.Players.LocalPlayer
players.CharacterAdded:Wait()
X = math.floor(players.Character.HumanoidRootPart.Position.X)
Y = math.floor(players.Character.HumanoidRootPart.Position.Y)
Z = math.floor(players.Character.HumanoidRootPart.Position.Z)
text = script.Parent.Text
while true do
text = X..","..Y..","..Z
X = math.floor(players.Character.HumanoidRootPart.Position.X)
Y = math.floor(players.Character.HumanoidRootPart.Position.Y)
Z = math.floor(players.Character.HumanoidRootPart.Position.Z)
end
please help me
I wanted to change the text to XYZ position in string
but everytime i launch the game the text didnt change
and it still at default text in roblox ui text label
The simple answer to your question of how do I change a TextLabel text is you just set the Text property.
script.Parent.Text = "Hello World"
If you want a simple way to track the changing position of a player's character, I would recommend using the Changed signal on the Part. It will fire the connected function every time the property changes, and it allows you to avoid using an infinite while-loop.
local text = script.Parent
local player = game.Players.LocalPlayer
-- wait for the player's character to exist
if not player.Character then
player.CharacterAdded:Wait()
end
-- listen for changes to the player's position
local hrp = player.Character.HumanoidRootPart
hrp:GetPropertyChangedSignal("Position"):Connect(function()
local position = hrp.Position
local x, y, z = math.floor(position.X), math.floor(position.Y), math.floor(position.Z)
-- format the position, and display it in the TextLabel
local positionString = string.format("(%d, %d, %d)", x, y, z)
text.Text = positionString
end)
So I can see that you have made few mistakes here
Explanation:
First of all, players.CharacterAdded:Wait() doesn't always work and never works in studio. So instead of that, you should use players.Character:WaitForChild("HumanoidRootPart").
Second thing. By calling text = script.Parent.Text you were requesting the text inside of it (you were getting it as a string), so to simply fix that you have to use text = script.Parent and then when changing text you will have to use text.Text = "your text".
The next one is making your while loop infinite by using bool true. You can't make it like that or else the playar may experience lag or even script may crash. So I'd suggest to put this to something like wait(0.1).
And the last thing is that you should get X,Y,Z before putting it into the text or else it will be delayed.
And your final script should be looking like this:
players = game.Players.LocalPlayer
players.Character:WaitForChild("HumanoidRootPart")
X = math.floor(players.Character.HumanoidRootPart.Position.X)
Y = math.floor(players.Character.HumanoidRootPart.Position.Y)
Z = math.floor(players.Character.HumanoidRootPart.Position.Z)
text = script.Parent
while wait(0.1) do
X = math.floor(players.Character.HumanoidRootPart.Position.X)
Y = math.floor(players.Character.HumanoidRootPart.Position.Y)
Z = math.floor(players.Character.HumanoidRootPart.Position.Z)
text.Text = X..","..Y..","..Z
end
Keep scripting, nothing is easy without practice,
KubaDC
I'm using ios-charts (https://github.com/danielgindi/Charts). I have a LineChartView with 12 values in the x axis.
This however is far too many to see at the same time, so I want to display only 5 and then let the user drag to the right to see the next.
I've tried this:
let chart = LineChartView()
chart.dragEnabled = true
chart.setVisibleXRangeMaximum(5)
let xAxis = chart.xAxis
xAxis.axisMinValue = 0
xAxis.axisMaxValue = 5.0
xAxis.setLabelsToSkip(0)
But still see all 11 values at the time. How can I only see 5?
I finally got it!
The correct answer is:
chart.setVisibleXRangeMaximum(5)
This however needs to be set after the data has been set in the chart (not in a configure before)
This did the trick for me
You should set the X axis's labelCount property of the chart view.
In objc,like this
_chartView.xAxis.labelCount = 5;
Swift
chartView.xAxis.labelCount = 5
Here is my finding!!
you don't need to really use label count
if you are using DefaultAxisValueFormatter, NEVER use this. a lot of errors pop ! just use no2.
chart.setVisibleXRangeMaximum(number) will do.
please put this after chart data setting here you can see detail
combinedChartView.data = combineData. //this need to come first
combinedChartView.setVisibleXRangeMaximum(2) //after data setting
I created a game object which acts as a repeating item for a UIGrid which I populate dynamically. The gameobject (RowItem) has couple of UILabel whose text can change on runtime depending on the content. The content of these UILabels overlap when the text is bigger. Can anybody help me in how to make UILabel expand relative to the adjacent UILabel when the text is more/less?
You can use transform.localScale property of the UILabel's property to scale it. Just make them bigger when the text is bigger than let's say 20 characters. Try with arbitrary values.
Also when you change the scale, run a re-align method, which aligns other labels so that they don't overlap.
you can get the text length in pixel by this:
UILabel label;
float width = label.relativeSize.x * label.transform.localScale.x;
float height = label.relativeSize.y * label.transform.localScale.y;
Let's say that you want to set you max length to 100, you can do this:
if (width > 100)
{
label.localScale = new Vector3(100 / label.relativeSize.x, 100/ label.relativeSize.x, 1);
}
the second param for Vector3 is also based on relativeSize.x is not a typo, that makes sure your text will not become thin.
Hope this works.
How to add a decimal button so I don't have to do whole numbers? If i wanted any decimal number like 1.2 or 100.4 or 3.0 or anything like that, how would I add it to the calculator I'm making?
You're not giving me much information in your question. How do the other buttons work?
If I was making a calculator I would have a label at the top showing the current reading. On press of a number button I would update the label with the number at the end.
For a decimal button you just add a . to the end of the label. You might want to have a global variable BOOL hasDecimalPlace and set it to true so you know if there is already a decimal place. Just remember to set it to false again when you clear the view or do a calculation or similar.
- (IBAction)Decimal:(id)sender{
NSString *currentText = Text.text;
if ([currentText rangeOfString:#"." options:NSBackwardsSearch].length == 0) {
Text.text = [Text.text stringByAppendingString:#"."];
}
}
I'm trying to write a little app, where on the main screen, I animate a flying "bubble". This animation has to be continuous. (I reuse the bubbles, which fly off the screen) I heard that animations have to run on the main thread, as does every operation which changes the UI. Is this true? When I try to show a UIAlertView on this screen, it's animation becomes very discursive because of the continuous bubble animation. (this is a custom alertview with an indicator) The device is an iPhone 4, so I don't think it should be a problem to show a normal UIAlertView.
And I would like to ask if I use the correct method for the bubble animation. So first of all, I use an NSTimer, which invokes the startAnimation method in every 0.01 seconds (I start it in the controller's viewDidAppear: method). In the startAnimation method, at first I generate bubbles with random x and y coordinates (to see bubbles on the screen right after the viewdidappear), and I generate bubbles on the bottom with random x and y = 460 coordinates. In the startAnimation method, I run a counter (called frames), and when the value of this counter equals 35, I call the bubble generate method again.
The problem:
I store the generated bubbles in an array, and the 'gone' bubbles (which are off the screen) in another array. First I try to reuse the bubbles in the gonebubbles array, then if the array is run out, I generate new bubbles. While this operation is processed, the continuous animation stops, then continues. The break is about one second, but this is very disturbing.
Can anyone help in this problem? Thanks in advice, madik
- (void)viewDidAppear {
.
timer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:#selector(startAnimation) userInfo:nil repeats:YES];
.
}
- (void)startAnimation {
self.current = [NSDate timeIntervalSinceReferenceDate];
double diff = (self.start - self.current);
if ( diff < 0 ) {
diff = (-1) * diff;
}
self.start = self.current;
frames++;
if ( shouldMoveBubbles ) {
[mug moveBubbles:diff];
}
if ( frames == 35 ) {
DebugLog(#"################################################################");
DebugLog(#"####################### FRAME = 35 ###########################");
DebugLog(#"################################################################");
[mug createNewBubbleOnTheBottomOfView:self.view];
frames = 0;
}
}
In the Mug class:
- (void)moveBubbles:(double)millisElapsed {
for (Bubble *bubble in bubbles) {
int bubbleSpeed = bubble.speed;
float deltaX = (float)(bubbleSpeed * -degrees_sinus * millisElapsed * 100);
float deltaY = (float)(bubbleSpeed * -degrees_cosinus * millisElapsed);
DebugLog(#"movebubbles x: %f, y:%f, speed: %d, sin:%f, cos:%f", deltaX, deltaY, bubbleSpeed, degrees_sinus, degrees_cosinus);
[bubble moveBubbleX:deltaX Y:deltaY];
}
}
And in the Bubble class:
- (void)moveBubbleX:(float)deltaX Y:(float)deltaY {
self.bubbleImage.center = CGPointMake(self.bubbleImage.center.x + deltaX, self.bubbleImage.center.y + deltaY);
}
This sounds like a memory problem. Slow UIAlertView animation is a sure sign of this. It sounds like the way you are generating bubbles is causing the problem. You mentioned the you keep two arrays of bubbles. You never say if you limit the number of bubbles that can be in either array at once. You also don't mention when you clean up these bubbles. It sounds like a memory "black hole". I'd recommend setting a maximum number of bubbles that you can show on screen at once.
Also, you mention a custom alert view. If you're modifying the UIAlertView, you're going to run into problems since that's not officially supported. Additionally, I've seen UIAlertView animation become slow when memory is tight. If you solve the memory issues with your bubbles, you'll probably solve this one too.
Finally, a word of advice. Making an animated game in UIKit is probably not a good idea. NSTimers are not as accurate as many people would like to think. UIImages are relatively expensive to load. Touching moving buttons is known to be unreliable at worst, hackish at best. I suggest looking into a game framework, such as Cocos2d-iphone.
Good luck!