i'm new in iOS developing and the objective c. so i want to start with a simple app.
i'm trying to make an app for a play cards game that records the score each round. so it just adds up each team (two teams ) score. in the app interface there will be three buttons and two text fields to add the scores and a text view to see all the scores recorded.
so now i'm on the record method n i get a runtime error after pressing record in the iPhone simulator :
- (IBAction)record:(id)sender {
// NSString *slna = lna.text;
// NSString *slhm = lhm.text;
int x, y, resultx, resulty;
x = [lna.text integerValue];
y = [lhm.text integerValue];
resultx = 0;
resulty = 0;
resultx= resultx+x;
resulty= resulty+y;
alnashrah.text = [NSString stringWithFormat:#"%d %d", resultx,resulty];
the error message i get : " Thread 1 : breakpoint 2.1 "
IF that is all the information the console is telling us, this is not an error message, it means you added a breakpoint. Beside your code, you will see a gutter line, if you press it you can add breakpoints which are these blue arrow things. Here is an image:
So to unselect the breakpoint, just click it or right click it and press delete.
Also to disable breakpoints: command+Y or press the breakpoints select button at the top near the stop button and the scheme bar and the build status bar
Related
I am new to GlovePie.
I created a second mouse that moves simultaneously with the first pointer while staying at a fixed distance. My intent is to get a left click from both pointers simultaneously, because my aim is to click on two buttons simultaneously.
Is it possible to do this?
The code I wrote, following the developer's wiki, is this:
Cursor2.PosX = Mouse.CursorPosX + 80
Cursor2.PosY = Mouse.CursorPosY + 0
Cursor2.LeftButton = Mouse.LeftButton
Cursor2.RightButton = Mouse.RightButton
Very simply. Moving works but simultaneous clicks don't. Any suggestions?
A friend of mine found online the solution to my request, which I share here even if I cannot fully understand its code. For example: why there are two mouse (mouse and mouse1) and two cursor (Cursor and Cursor2)? So if any of you are able to comments the lines of code, I would be grateful to understand them!
mouse.Swallow = true
fakemouse.DirectInputX = mouse1.DirectInputX
fakemouse.DirectInputY = mouse1.DirectInputY
var.x1 = mouse1.cursorPosX
var.x2 = 350
mouse.LeftButton = mouse1.LeftButton
if !mouse1.LeftButton then
Cursor2.PosX = var.x1 - var.x2
Cursor2.PosY = mouse1.cursorPosY
endif
if mouse1.LeftButton then
press mouse1.LeftButton
wait 20ms
release mouse1.LeftButton
Cursor2.PosX = var.x1
Cursor.PosX = var.x1 - var.x2
press mouse1.LeftButton
wait 20ms
release mouse1.LeftButton
Cursor2.PosX = var.x1
Cursor.PosX = var.x1 + var.x2
endif
We are building a catalog app that has 2 rows of sorted images with varying widths but same height. We draw the artwork on scrollview in sorted order (from A to Z) As per attached image.
We search using a alphabetically ordered bar on top that has letters (A to Z) If i touch on letter J the i want the artwork which starts from j comes first. The code we are using is not working well. E.g. clicking on J takes us to A. Will greatly appreciate your help or advice.
Code is as follows:
NSString *newStr = [currentArtworkTitle substringWithRange:NSMakeRange(0,1)];
if([newStr isEqualToString:self.searchString])
if (scrollViewTopRowWidth > scrollViewBottomRowWidth) {
xCordForSortedView = scrollViewTopRowWidth - c - imgForButton.size.width;//self.touchLengthCount;//50 ;// -10//c scrollViewBottomRowWidth
}
else {
xCordForSortedView = scrollViewBottomRowWidth - c - imgForButton.size.width;// self.touchLengthCount;//40;//scrollViewTopRowWidth
}
// For shifting the screen
if(scrollViewTopRowWidth > scrollViewBottomRowWidth){
int tmpMargin = scrollViewTopRowWidth - xCordForSortedView;
if(tmpMargin < 1024)
scrollView.contentSize = CGSizeMake(scrollViewTopRowWidth+1024,scrollView.bounds.size.height);
}
else{
int tmpMargin = scrollViewBottomRowWidth - xCordForSortedView;
if(tmpMargin < 1024)
scrollView.contentSize = CGSizeMake(scrollViewBottomRowWidth+1024,scrollView.bounds.size.height);
}
[scrollView scrollRectToVisible:CGRectMake(xCordForSortedView, 0,scrollView.frame.size.width, scrollView.frame.size.height) animated:YES];
I won't edit your code but I can give you a hint.
Look, when you populate the scrollwiew, by adding an imageview, add also an entry into a NSMutableDictionary (instance variable), so the key will be the A-Z letter, and the value will be the x position of the image. When you finish populating the scrollview, you will have also the dictionary containing the position of all your images (and you need only the x) and the corresponding letter. Now you tap "J" and hit "Search" - you parse your dictionary to fing the object with the key "J" and read it's value. Use this (x) value to set your srollview's contentOffset. Tada!
When you touch the screen in Windows 8, the mouse pointer is hidden until you move the mouse (or other pointing device). This happens in both desktop and Metro interfaces.
We have a program that allows people to move the mouse pointer using other input methods (such as a joystick), so I need to ensure the mouse pointer is visible.
How can I force the mouse pointer to be displayed?
you can set the flag of touch feedback.
[setting] ->[control panel]->[pen and touch]->[touch feekback] item,there is a checkbox that is [show visual feedback when touch the screen].If you cann't select the checkbox, you can show the mouse pointer without coding anything when touching the screen.
You can inject mouse movement before you start joystick control, using Windows API:
POINT p;
GetCursorPos(&p);
MOUSEINPUT mi;
mi.dx = (LONG) ((p.x * 65535) / screen_width);
mi.dy = (LONG) ((p.y * 65535) / screen_height);
mi.mouseData = 0;
mi.dwFlags = type | MOUSEEVENTF_ABSOLUTE;
mi.time = 0;
mi.dwExtraInfo = NULL;
INPUT input;
input.type = INPUT_MOUSE;
input.mi = mi;
SendInput(1, &input, sizeof(INPUT));
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!