I have 4 function and i want to execute them randomly every 1 second for unlimited time.
This is my code to execute a random function:
-(void) Game
{
int rand = arc4random() % 5;
switch (rand) {
case 0:
[self appearred];
break;
case 1:
[self appearblue];
break;
case 2:
[self appearyellow];
break;
case 3:
[self appeargreen];
break;
}
}
But how can i repeat this function every 1 second??
You can also try like this
*
-(void) Game
{
int rand = (int)arc4random() % 4;
switch (rand) {
case 0:
[self appearred];
break;
case 1:
[self appearblue];
break;
case 2:
[self appearyellow];
break;
case 3:
[self appeargreen];
break;
}
[self performSelector:#selector(Game) withObject:nil afterDelay:1.0];
}
*
It will call the Game Functions after each second
Just use a NSTimer.
PS : You will not be 100% sure that this will append every 1second.
Use below code which will call Game method every 1.0 second. One more thing, in your Game method you need to use % 4 instead of % 5 to get value between 0 to 3.
[NSTimer scheduledTimerWithTimeInterval:1.0
target:self
selector:#selector(Game)
userInfo:nil
repeats:YES];
-(void) Game
{
int rand = (int)arc4random() % 4;
switch (rand) {
case 0:
[self appearred];
break;
case 1:
[self appearblue];
break;
case 2:
[self appearyellow];
break;
case 3:
[self appeargreen];
break;
}
}
Related
In my sprite kit game, nodes are endlessly moving up the screen, however, when they first appear on the screen the game lags and the fps fluctuates. After several seconds the nodes start to move smoothly, however, at times their movement is still fidgety. I believe that there is a problem with my update methods, however I am unsure of how to structure them in a better way. Below are my update methods. Any help will be much appreciated, thanks in advance
- (void)updateWithTimeSinceLastUpdate:(CFTimeInterval)timeSinceLast {
self.lastSpawnTimeInterval += timeSinceLast;
if (self.lastSpawnTimeInterval >= increment) {
self.lastSpawnTimeInterval = 0;
int randomNumber = arc4random_uniform(24);
switch (randomNumber) {
case 1:
[self addChild: [self obstacle1]];
[self addChild: [self obstacle5]];
break;
case 2:
[self addChild: [self obstacle1]];
[self addChild: [self obstacle6]];
break;
case 3:
[self addChild: [self obstacle1]];
[self addChild: [self obstacle7]];
break;
case 4:
[self addChild: [self obstacle1]];
[self addChild: [self obstacle8]];
break;
case 5:
[self addChild: [self obstacle2]];
[self addChild: [self obstacle5]];
break;
case 6:
[self addChild: [self obstacle2]];
[self addChild: [self obstacle6]];
break;
case 7:
[self addChild: [self obstacle2]];
[self addChild: [self obstacle7]];
break;
case 8:
[self addChild: [self obstacle2]];
[self addChild: [self obstacle8]];
break;
case 9:
[self addChild: [self obstacle3]];
[self addChild: [self obstacle5]];
break;
case 10:
[self addChild: [self obstacle3]];
[self addChild: [self obstacle6]];
break;
case 11:
[self addChild: [self obstacle3]];
[self addChild: [self obstacle7]];
break;
case 12:
[self addChild: [self obstacle3]];
[self addChild: [self obstacle8]];
break;
case 13:
[self addChild: [self obstacle4]];
[self addChild: [self obstacle5]];
break;
case 14:
[self addChild: [self obstacle4]];
[self addChild: [self obstacle6]];
break;
case 15:
[self addChild: [self obstacle4]];
[self addChild: [self obstacle7]];
break;
case 16:
[self addChild: [self obstacle1]];
break;
case 17:
[self addChild: [self obstacle2]];
break;
case 18:
[self addChild: [self obstacle3]];
break;
case 19:
[self addChild: [self obstacle4]];
break;
case 20:
[self addChild: [self obstacle5]];
break;
case 21:
[self addChild: [self obstacle6]];
break;
case 22:
[self addChild: [self obstacle7]];
break;
case 23:
[self addChild: [self obstacle8]];
break;
default:
[self addChild: [self obstacle4]];
[self addChild: [self obstacle8]];
break;
}
}
}
- (void)update:(NSTimeInterval)currentTime {
// Handle time delta.
// If we drop below 60fps, we still want everything to move the same distance.
CFTimeInterval timeSinceLast = currentTime - self.lastUpdateTimeInterval;
self.lastUpdateTimeInterval = currentTime;
if (timeSinceLast >= 1) { // more than a second since last update
timeSinceLast = 1 / 60.0;
self.lastUpdateTimeInterval = currentTime;
}
[self updateWithTimeSinceLastUpdate:timeSinceLast];
}
The increment integer I have implemented varies between 1.0 and 1.9 and gradually decreases as game continues.
Below is one of my obstacle methods. All obstacle methods are relatively similar. The only differences are position and image.
- (SKSpriteNode *)obstacle1 {
int placement[6] = {0, 50, 100, 150, 200, 250};
int RandomPlacement = placement[(arc4random()%6)];
NSArray *obstacle1Images;
SKSpriteNode *obstacle1Node;
obstacle1Node = [SKSpriteNode spriteNodeWithImageNamed:#"dodgR - spike left iPad.png"];
obstacle1Node.position = CGPointMake(CGRectGetMidX(self.frame) - 321.5, CGRectGetMidY(self.frame)-self.frame.size.width/2 - RandomPlacement);
obstacle1Node.size = CGSizeMake(292, 95);
obstacle1Images = #[[SKTexture textureWithImageNamed:#"dodgR - spike left iPad.png"],
[SKTexture textureWithImageNamed:#"dodgR - spike left iPad; 1.png"],
[SKTexture textureWithImageNamed:#"dodgR - spike left iPad; 2.png"],
[SKTexture textureWithImageNamed:#"dodgR - spike left iPad; 3.png"],
];
SKAction *obstacle1Animation = [SKAction animateWithTextures:obstacle1Images timePerFrame:0.2];
SKAction *obstacle1Repeat = [SKAction repeatActionForever:obstacle1Animation];
[obstacle1Node runAction:obstacle1Repeat];
SKNode *person1 = [self childNodeWithName:#"person1"];
if (person1.position.y > obstacle1Node.position.y) {
[self ScoreTing];
}
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I have four squares on my screen and I want each of the squares to display a different image every time for each square. I have got it to work, but as the code repeats sometimes there is a delay. I'm not sure what I'm doing wrong.
Here is my main code
#import "HomeScreenViewController.h"
#interface HomeScreenViewController ()
#end
#implementation HomeScreenViewController
-(void)startRandomSquares
{
self.greenImage = [UIImage imageNamed:#"GreenSquare.png"];
self.redImage = [UIImage imageNamed:#"RedSquare"];
self.blueImage = [UIImage imageNamed:#"BlueSquare"];
self.purpleImage = [UIImage imageNamed:#"PurpleSquare"];
self.arrayOfColors = [NSMutableArray arrayWithObjects:self.greenImage,self.redImage, self.blueImage, self.purpleImage, nil];
}
-(IBAction)Button1:(id)sender
{
self.startLabel.hidden = YES;
}
-(IBAction)Button2:(id)sender
{
}
-(IBAction)Button3:(id)sender
{
}
-(IBAction)Button4:(id)sender
{
}
-(void)randomizeAllSquares
{
[self randomizedSquare1];
[self randomizedSquare2];
[self randomizedSquare3];
[self randomizedSquare4];
}
-(void)randomizedSquare1
{
[self startRandomSquares];
randomColor = arc4random() % [self.arrayOfColors count];
square1RandomNumber = randomColor;
// NSLog(#"Square 1 : %d", square1RandomNumber);
//NSLog(#"Square 1 colors : %#", self.arrayOfColors);
switch (square1RandomNumber) {
case 0:
self.square1.image = self.arrayOfColors[0];
break;
case 1:
self.square1.image = self.arrayOfColors[1];
break;
case 2:
self.square1.image = self.arrayOfColors[2];
break;
case 3:
self.square1.image = self.arrayOfColors[3];
break;
default:
break;
}
if (square1RandomNumber == square2RandomNumber ) {
[self randomizedSquare1];
NSLog(#"Square 1-2 MATCH!!!");
}
if (square1RandomNumber == square4RandomNumber) {
[self randomizedSquare1];
NSLog(#"Square 1-4 Match!!!");
}
}
-(void)randomizedSquare2
{
[self startRandomSquares];
randomColor = arc4random() % [self.arrayOfColors count];
square2RandomNumber = randomColor;
//NSLog(#"Square 2 : %d", square2RandomNumber);
//NSLog(#"Square 2 colors : %#", self.arrayOfColors);
switch (square2RandomNumber) {
case 0:
self.square2.image = self.arrayOfColors[0];
break;
case 1:
self.square2.image = self.arrayOfColors[1];
break;
case 2:
self.square2.image = self.arrayOfColors[2];
break;
case 3:
self.square2.image = self.arrayOfColors[3];
break;
default:
break;
}
if (square2RandomNumber == square1RandomNumber ) {
[self randomizedSquare2];
NSLog(#"Square 2-1 Match!!!");
}
if (square2RandomNumber == square4RandomNumber) {
[self randomizedSquare2];
NSLog(#"Square 2-4 Match!!!");
}
}
-(void)randomizedSquare3
{
[self startRandomSquares];
randomColor = arc4random() % [self.arrayOfColors count];
square3RandomNumber = randomColor;
//NSLog(#"Square 3 : %d", square3RandomNumber);
//NSLog(#"Square 3 colors : %#", self.arrayOfColors);
switch (square3RandomNumber) {
case 0:
self.square3.image = self.arrayOfColors[0];
break;
case 1:
self.square3.image = self.arrayOfColors[1];
break;
case 2:
self.square3.image = self.arrayOfColors[2];
break;
case 3:
self.square3.image = self.arrayOfColors[3];
break;
default:
break;
}
if (square3RandomNumber == square2RandomNumber ){
[self randomizedSquare3];
NSLog(#"Square 3 - 2 MATCH!!!");
}
if (square3RandomNumber == square1RandomNumber) {
[self randomizedSquare3];
NSLog(#"Square 3- 1 MATCH!!");
}
}
-(void)randomizedSquare4
{
[self startRandomSquares];
randomColor = arc4random() % [self.arrayOfColors count];
square4RandomNumber = randomColor;
//NSLog(#"Square 4 : %d", square4RandomNumber);
//NSLog(#"Square 4 colors : %#", self.arrayOfColors);
switch (square4RandomNumber) {
case 0:
self.square4.image = self.arrayOfColors[0];
break;
case 1:
self.square4.image = self.arrayOfColors[1];
break;
case 2:
self.square4.image = self.arrayOfColors[2];
break;
case 3:
self.square4.image = self.arrayOfColors[3];
break;
default:
break;
}
if (square4RandomNumber == square2RandomNumber ) {
[self randomizedSquare4];
NSLog(#"Square 4-2 MATCH!!");
}
if (square4RandomNumber == square1RandomNumber) {
[self randomizedSquare4];
NSLog(#"SQuare 4-1 MATCH!!");
}
if (square4RandomNumber == square3RandomNumber) {
[self randomizedSquare4];
NSLog(#"Square 4-3 Match");
}
}
Ouch, that's a lot of code duplication. In general if you find yourself writing a similar piece of code multiple times it's not just best practice to generalize it, but you'll likely end up with a better solution.
A simple shuffle function on your array along with a simple reassign would work, and will give a runtime of N (ie the loop will only go through the array once per call). What you have now will technically try to create the color for a square multiple times in the case that it finds a match which is the reason for your slowness. Square 4 has a 3/4 chance that it will get the same color as another square so it likely runs at least 3 times before stopping.
- (void)shuffleImages
{
//uses the Fisher-Yates shuffle algorithm
for (NSUInteger i = self.arrayOfColors.count - 1; i >= 1; i--)
{
int index = arc4random_uniform(i+1);
[self.arrayOfColors exchangeObjectAtIndex:index withObjectAtIndex:i];
}
}
- (void)updateImages
{
[self shuffleImages];
self.square1.image = self.arrayOfColors[0];
self.square2.image = self.arrayOfColors[1];
self.square3.image = self.arrayOfColors[2];
self.square4.image = self.arrayOfColors[3];
}
All you need to do when you want your colors to change is call the updateImages function.
The delay comes from the check at the end of each randomisation. There's a 75% chance the number generated is in one of the other 3 squares, so it will loop and loop until it generates the only number it can be.
A better solution would be to shuffle the array of images, and then assign each image to each view in order.
e.g. (pseudo-code)
shuffle array of images
view 1 = array[0]
view 2 = array[1]
...
view 4 = array[3]
Brandon is right about the insane amount of code duplication, and using the fischer-yates algorithm is definitely the right way to go, but it sounds like you also want this to repeat, so you should use an NSTimer.
#property (strong, nonatomic) NSTimer *randomizeColorTimer;
- (void)startRandomizing
{
_randomizeColorTimer = [NSTimer scheduledTimerWithTimeInterval:0.25
target:self
selector:#selector(shuffleImages)
userInfo:nil
repeats:YES];
}
- (void)stopRandomizing
{
[_randomizeColorTimer invalidate];
_randomizeColorTimer = nil;
}
array of images added into Project
imaging is the UIImageView and imagg is Image choosen by user its default
_imaging.image=imagg;
arr = [NSArray arrayWithObjects:
[UIImage imageNamed:#"1.jpg"],
[UIImage imageNamed:#"2.jpeg"],
[UIImage imageNamed:#"3.jpeg"],
[UIImage imageNamed:#"4.jpeg"],
[UIImage imageNamed:#"5.jpeg"],
nil];
assume user selected third image i.e 3.jpeg i am showing the 3.jpeg in imageview. Then using two button actions respectively Next and Previous next or previous images 3.jpeg should display.
- (IBAction)previous:(id)sender {
////
}
- (IBAction)next:(id)sender {
//////
}
}
for the next action its starting from 2nd image even for previous action its starting from 1st image.
this is the simple concept, this is working in static method, but working fine
assign the one global variable
#property (strong,nonatomic) NSString *imagestr;
- (IBAction)previous:(id)sender {
int str=[imagestr integerValue];
NSLog(#"the int value==%d",str);
switch (str) {
case 0:
_imaging.image=[arr objectAtIndex:4];
imagestr=#"4";
break;
case 1:
_imaging.image=[arr objectAtIndex:0];
imagestr=#"0";
break;
case 2:
_imaging.image=[arr objectAtIndex:1];
imagestr=#"1";
break;
case 3:
_imaging.image=[arr objectAtIndex:2];
imagestr=#"2";
break;
case 4:
_imaging.image=[arr objectAtIndex:3];
imagestr=#"3";
break;
default:
break;
}
}
- (IBAction)next:(id)sender {
int str=[imagestr integerValue];
NSLog(#"the int value==%d",str);
switch (str) {
case 0:
_imaging.image=[arr objectAtIndex:1];
imagestr=#"1";
break;
case 1:
_imaging.image=[arr objectAtIndex:2];
imagestr=#"2";
break;
case 2:
_imaging.image=[arr objectAtIndex:3];
imagestr=#"3";
break;
case 3:
_imaging.image=[arr objectAtIndex:4];
imagestr=#"4";
break;
case 4:
_imaging.image=[arr objectAtIndex:0];
imagestr=#"0";
break;
default:
break;
}
}
On clicked on next button
Before using this first set currentIndex in this
-(IBAction)next{
if (arr.count > 0) {
currentIndex++;
if (currentIndex > arr.count - 1) {
currentIndex = 0;
}
imageViewObj.image = [arr objectAtIndex:currentIndex];
}
}
on pervious button
-(IBAction)pervious{
if (arr.count > 0) {
currentIndex--;
if (currentIndex <= 0) {
currentIndex = arr.count - 1;
}
imageViewObj.image = [arr objectAtIndex:currentIndex];
}
}
Try this is working fine
Set some integer property currentIndex to 2 (if you load first the 3rd image).
When calling the next/previous methods increment/decrement that property and load the correct image. ImageView *image = [arr objectAtIndex:currentIndex]
when you initialize your view controller, keep track of the current image being viewed for example 0, to be used as an array index.
When next is pressed, increment the index and retrieve the image from the array using the updated count.
e.g.
- (IBAction)next:(id)sender {
imageCount++;
[myImageView setImage:[UIImage imageNamed:arr[imageCount] ];
}
hope this helps. :)
How can i change the Color of my Picker view depending on the background color of the TextField? e.g i have 2 text fields, The one is red and the other one is blue, If i clicked the red one the picker background is red also, And if i click the blue one the picker background will be blue also? im using this code for the text field to show the picker view.
int tag = [(UITextField*)sender tag];
self.myPicker.hidden = NO;
selectedTable = tag;
[sender resignFirstResponder];
float yy = 10;
switch (tag) {
case 0: yy = self.txtTgfeet.frame.origin.y + self.myPicker.frame.size.height;
break;
case 1: yy = self.txtTginches.frame.origin.y + self.myPicker.frame.size.height;
break;
case 2: yy = self.txtTgfraction.frame.origin.y + self.myPicker.frame.size.height;
break;
case 3: yy = self.txtBgfeet.frame.origin.y - self.myPicker.frame.size.height;
break;
case 4: yy = self.txtBginches.frame.origin.y - self.myPicker.frame.size.height;
break;
case 5: yy = self.txtBgfraction.frame.origin.y - self.myPicker.frame.size.height;
break;
case 6: yy = self.txtGravity.frame.origin.y - self.myPicker.frame.size.height;
break;
case 7: yy = self.txtBsw.frame.origin.y - self.myPicker.frame.size.height;
break;
case 8: yy = self.txtTemp.frame.origin.y - self.myPicker.frame.size.height;
break;
default:
break;
}
thank you!
use self.picker.backgroundColor = [UIColor redColor]; in textFieldDidBeginEditing: UITextFieldDelegate method and change color using by using tag property.
if(textField.tag == 1){
self.picker.backgroundColor = [UIColor redColor];
}
else if(textField.tag == 2){
self.picker.backgroundColor = [UIColor redColor];
}
else{
//use default value
}
Edit:
switch (tag) {
case 0: yy = self.txtTgfeet.frame.origin.y + self.myPicker.frame.size.height;
self.picker.backgroundColor = [UIColor redColor];
break;
case 1: yy = self.txtTginches.frame.origin.y + self.myPicker.frame.size.height;
self.picker.backgroundColor = [UIColor bluecolor];
break;
case 2: yy = self.txtTgfraction.frame.origin.y + self.myPicker.frame.size.height;
self.picker.backgroundColor = [UIColor greenColor];
break;
case 3: yy = self.txtBgfeet.frame.origin.y - self.myPicker.frame.size.height;
break;
case 4: yy = self.txtBginches.frame.origin.y - self.myPicker.frame.size.height;
break;
case 5: yy = self.txtBgfraction.frame.origin.y - self.myPicker.frame.size.height;
break;
case 6: yy = self.txtGravity.frame.origin.y - self.myPicker.frame.size.height;
break;
case 7: yy = self.txtBsw.frame.origin.y - self.myPicker.frame.size.height;
break;
case 8: yy = self.txtTemp.frame.origin.y - self.myPicker.frame.size.height;
break;
default:
break;
}
add different background colour for each case
I currently have a UISwitch that when turned on and off increments and decrements a counter respectively.
When the counter is at 0 the counter will not decrement. Functionally, this works perfectly however I have noticed a bug and wondered if anyone has experienced this.
Essentially if you very very quickly double tap the UISwitch at its far position (fully on or off) the counter will increment twice as I'm imagining the UISwitch isn't fully hitting the off state and is therefore simply adding to the counter again without first decrementing it.
Here's the code I'm using to do the checks on the switch:
// Sliders modified
- (IBAction)personalityChanged:(id)sender {
if ([personality isOn] ){
[[[GlobalData sharedGlobalData]personalitySliderValue] replaceObjectAtIndex:currentRecord-1 withObject:#"1"];
rating ++;
NSLog(#"The value of personality slider is %#", [[[GlobalData sharedGlobalData]personalitySliderValue] objectAtIndex:currentRecord-1]);
[personality set]
}
else {
[[[GlobalData sharedGlobalData]personalitySliderValue] replaceObjectAtIndex:currentRecord-1 withObject:#"0"];
[self subtractFromRating:nil];
NSLog(#"The value of personality slider is %#", [[[GlobalData sharedGlobalData]personalitySliderValue] objectAtIndex:currentRecord-1]);
}
[self checkRating:nil];
}
Then the subtract rating:
// subtract from rating
-(void)subtractFromRating:(id)sender{
if (rating == 0) {
// do nothing
}
else
{
rating --;
}
}
And finally the result of what happens if the slider is in a position:
// check rating
-(void)checkRating:(id)sender{
switch (rating) {
case 0:
[matchRating setText:#""];
[ratingGraphic setImage:[UIImage imageNamed:#""]];
NSLog(#"rating is 0");
break;
case 1:
[matchRating setText:#"Single Match"];
[ratingGraphic setImage:[UIImage imageNamed:#"ratinggraphic1.png"]];
NSLog(#"rating is 1");
break;
case 2:
[matchRating setText:#"Potential Match"];
[ratingGraphic setImage:[UIImage imageNamed:#"ratinggraphic2.png"]];
NSLog(#"rating is 2");
break;
case 3:
[matchRating setText:#"Great Match"];
[ratingGraphic setImage:[UIImage imageNamed:#"ratinggraphic3.png"]];
NSLog(#"rating is 3");
break;
case 4:
[matchRating setText:#"Hot Match"];
[ratingGraphic setImage:[UIImage imageNamed:#"ratinggraphic4.png"]];
NSLog(#"rating is 4");
break;
default:
break;
}
}
Is there a way to make sure the switch goes from the on state to the off fully before returning or a better approach for this?
A solution to detect if there has actually been a change is to keep an additional BOOL variable that keeps track of the last switch state.
BOOL lastValue = NO; // initial switch state
- (IBAction)personalityChanged:(id)sender {
if (personality.isOn != lastValue) {
lastValue = personality.isOn;
if ([personality isOn] ){
[[[GlobalData sharedGlobalData]personalitySliderValue] replaceObjectAtIndex:currentRecord-1 withObject:#"1"];
rating ++;
NSLog(#"The value of personality slider is %#", [[[GlobalData sharedGlobalData]personalitySliderValue] objectAtIndex:currentRecord-1]);
[personality set]
}
else {
[[[GlobalData sharedGlobalData]personalitySliderValue] replaceObjectAtIndex:currentRecord-1 withObject:#"0"];
[self subtractFromRating:nil];
NSLog(#"The value of personality slider is %#", [[[GlobalData sharedGlobalData]personalitySliderValue] objectAtIndex:currentRecord-1]);
}
[self checkRating:nil];
}
}
This will then only perform when the switch state has actually changed.