In Cocos2D 2.x, I am doing runAction to do some animations in my game. It is working great but I want the animation to repeat a certain number of times.
So pretty much my pseudo-code is this:
CCSequence... action1, action2
[sprite runAction:theSequence];
So I just want to repeat the action for (lets say 3 times), how would I do this? I do not see any API to do this but maybe I am just not seeing something. If anyone knows how to do this and could share the information that would be great!
Thanks!
You can use CCRepeat to repeat an action a number of times:
id repeatAction = [CCRepeat actionWithAction:theSequence times:3];
[sprite runAction:repeatAction];
$$ You can use CCRepeatForever to Repeat action: $$
id scaleAction = [CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:3.0f scaleX:1.0 scaleY:1.0] rate:2.0];
id scaleUpAction = [CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:1.0f scaleX:4.8 scaleY:4.8] rate:2.0];
id scaleUpAction1 = [CCEaseInOut actionWithAction:[CCScaleTo actionWithDuration:12 scaleX:4.8 scaleY:4.8] rate:2.0];
CCSequence *scaleSeq = [CCSequence actions:scaleAction,scaleUpAction,scaleUpAction1, nil];
[scaleleft runAction:[CCRepeatForever actionWithAction:scaleSeq]];
Related
My app uses multiple threads of NSTimer Object.
Within the one function (called randomly at random times, not a fixed delay) I want it to pause the whole app, pause the threads for 1 second only. I have the following code:
[self performSelector:#selector(subscribe) withObject:self afterDelay:3.0 ];
Which is objective C, and I tried translating it into Swift like this:
self.performSelector(Selector:changeColourOfPage(), withObject: self, afterDelay: 1.0)
But I am getting the error Missing argument for parameter 'waitUntilDone' in call and when I put that in, it says it wants the argument modes but when I put that in it says Extra argument modes.
I cannot figure out how to pause the app and all it's threads for a couple of seconds, and then carry on like normal?
Any ideas?
The performSelector methods aren't available in Swift. You can get the delay functionality by using dispatch_after.
let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(NSEC_PER_SEC * 1))
dispatch_after(delayTime, dispatch_get_main_queue()){
changeColourOfPage()
}
Another way in Swift 3.1
DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(1)) {
changeColourOfPage()
}
You can substitute other units like .milliseconds(1000) or .microseconds(1_000_000) or .nanoseconds(1_000_000_000) for the time interval.
Sorry to answer an old question, but just came along a better way to do this -
import Darwin //Put this line at the beginning of your file
func pauseForAMoment() {
sleep(1)
changeColorOfPage()
}
Previously, with Objective-C I could use performSelector: in order to repeat an action after a random period of time which could vary between 1-3 seconds. But since I'm not able to use performSelector: in Swift, I've tried using "NSTimer.scheduledTimerWithTimeInterval". And it works in order to repeat the action. But there is a problem. On set the time variable to call a function that will generate a random number. But it seems that NSTimer uses the same number every time it repeats the action.
What that means is that the action is not performed randomly, but instead, after a set period of time that is generated randomly at the beginning of the game and it is used during all the game.
The question is: Is there any way to set the NSTimer to create a random number every time it executes the action? Or should I use a different method? Thanks!
#LearnCocos2D is right... use SKActions or the update method in your scene. Here is a basic example of using update to repeat an action after a random period of time.
class YourScene:SKScene {
// Time of last update(currentTime:) call
var lastUpdateTime = NSTimeInterval(0)
// Seconds elapsed since last action
var timeSinceLastAction = NSTimeInterval(0)
// Seconds before performing next action. Choose a default value
var timeUntilNextAction = NSTimeInterval(4)
override func update(currentTime: NSTimeInterval) {
let delta = currentTime - lastUpdateTime
lastUpdateTime = currentTime
timeSinceLastAction += delta
if timeSinceLastAction >= timeUntilNextAction {
// perform your action
// reset
timeSinceLastAction = NSTimeInterval(0)
// Randomize seconds until next action
timeUntilNextAction = CDouble(arc4random_uniform(6))
}
}
}
use let wait = SKAction.waitForDuration(sec, withRange: dur) in your code. SKAction.waitForDuration with withRange parameter will compute random time interval with average time = sec and possible range = dur
Generate a random time yourself and use dispatch_after to do the action.
For more information on dispatch_after, see here. Basically you can use this instead of performSelector
Is there a way when I click on a ToolStripButton, it shows the WaitCursor and updates the StatusStrip for about 10 seconds, then returns back to normal. I just don't know how to type in the coding.
If someone could guide me through the process. (or even give me the code)
Thank You
J Mahone
Using a timer:
1:Add a timer from your component toolbox to your form.
2:Set the inteval to 10,000 (this is in milliseconds, 1000 = 1 second)
3:In the timers' "Tick" event, write this code:
Timer1.stop 'This assumes your timer it named Timer1
Me.Cursor = Cursors.Default
4: When you want to make it show the cursor, either have a method to do both these lines and call the method or just write these 2 lines all over the place:
Me.Cursor = Cursors.WaitCursor
Timer1.Start
I'd suggest to use async/await to keep the "normal" program flow.
Me.Cursor = Cursors.WaitCursor
Await Task.Delay(10000)
Me.Cursor = Cursors.Default
I'm new to xcode so please bear with me.
I have a label that I have set to blank, and after a user clicks 'go' I generate a random word or number and use:
self.label.stringValue = "some_word"
to update the view. (I am using MacRuby btw)
However, I would like to show 20 or so random words in quick succession before the last one is shown - just because it's too boring at the moment. (Alternatively, I'd be happy with showing an animated graphic in its place - which is replaced by the final random word.)
I've tried things like:
100.times do
num = rand(40)
self.label.stringValue = num
end
But it doesn't work. I've also tried .reloadData but to no avail as well.
Any ideas on how to achieve this?
So as not to leave the question haning, from the Macruby mailing list:
def drawWord(sender)
if !next_word
self.timer.invalidate
return
end
self.label.stringValue = next_word
self.setNeedsDisplay true
end
def next_word
...
end
self.timer = NSTimer.scheduledTimerWithTimeInterval( 1/20.0,
target:self, selector:"drawWord:", userInfo:nil, repeats:true)
sorry for my question and for the long explanation following here, probably there's a simple solution for someone who is experienced in Cocoa and Objective-C, but I'm just starting few weeks ago and I can't figure out how to get this thing working, Grrrrrrr!!
OK, let's put it like this, in my window I have the following:
2 TextField(NSTextField) called:
blockOffText
blockOnText
1 Label(NSTextField) called:
flightTimeText
1 button(NSButton) called:
updateButton
What I want to do is all about time calculation I guess, get the "start-time" in one TextField and the "end-time" in the other.
One is supposed to be the "takeoff-time" and the other the "landing-time" or for example the "duty-startTime" and "duty-endTime"...it's the same!
Then I want to calculate the "flight-time" or "duty-time" and show it in the Label.
At the end I will also need to store the value or the time in a database as an integer, the value should be represented by all minutes corresponding to each time, but the database part is not a problem at the moment.
Maybe I can write the number in the TextField without the format but just the number and get the time show-up formatted in some way?
I would like to write for example "1245" and "1525" without having the needs to put the ":" between the hours and minutes, then can I get the value formatted "12:45" "15:25" in the TextField in some way? Maybe after pressing the button?
Ok, that is a second problem anyway, my real problem is I need to get the value I wrote in the TextField ("1245" and "1525") to be assigned to some variables in the program that I called "BlockOff" and "BlockOn".
I need to transform them in an integer that represent the minutes corresponding to their value..example:
The 1245 will become 765 minutes...(12 times 60 + 45)
and 1525 will become 925 minutes...(15 times 60 + 25)
HOW CAN I DO THIS?
In this way I can use the minutes to calculate the difference to get the flight time or even add flight time to other flight time.
At the moment my program works a little bit differently... like this:
If I directly assign the value to the two variables:
int blockOff = 765;
int blockOn = 925;
then I can calculate and show in the two TextField the takeOff and landing time formatted like I want: "12:45" "15:25"...I use other 2 variables to do so:
int oreBlkOff, minBlkOff = 0;
minBlkOff = blockOff % 60;
oreBlkOff = (blockOff - minBlkOff) / 60;
Then I can show the value in the TextField:
[blockOffText setStringValue:[NSString stringWithFormat: #"%d:%d", oreBlkOff, minBlkOff]];
Same with blockOnText and flightTimeText, so there is no problem there, but this is not really what I need right?
HOW CAN I GET THE VALUE OF THE TEXTFIELD AND STORE THE VALUE IN VARIABLES THAT CAN BE USED TO DO CALCULATION?
HOW DO I GET THE FIRST TO DIGITS AND LAST TO DIGITS FROM THE VARIABLES SO I CAN USE THEM AS HOURS AND MINUTES FOR MY CALCULATION?
I WOULD LIKE TO BE ABLE TO TYPE THE VALUE IN THE TEXTFIELD, PRESS "ENTER" OR "RETURN" AND GET THE VALUE ASSIGNED IN THE VARIABLE.
IS THIS THE CORRECT WAY OR I'M JUST GOING THE WRONG WAY IN THIS.
IN ANOTHER PROGRAM I DID IN VISUAL BASIC THAT WAS THE WAY I USED.
THANK YOU VERY MUCH IN ADVANCE FOR YOU HELP!
Gianluca
To get the int value from text field you'd use integerValue or floatValue for float. But you should definitely check out the date/time controls in cocoa.
Ok, if I didn't miss the point of your long question...
You have a text field with something like #"2345:8743" and you want to get the two numbers in int variables (a=2345, b=8743).
First you need to get these two text representations of your numbers in two NSStrings. You can do it like this:
NSString * yourString = #"2345:8743";
NSString *stringA = [yourString substringToIndex:4]; //stringA = #"2345"
NSString *stringB = [yourString substringFromIndex:5]; //stringB = #"8743";
Now to get the in values, just do:
int a = [stringA intValue];
int b = [stringB intValue];
Let me know if that is helpful to you.