I am currently working on a project in Xcode 4.4 with objective-c not in cocos2d where I have a view called GameView and a class called Characters. In the GameView have, well, the game, this is the scene in which you play the game. In the Characters, all the characters images and powers or anything unique to them are called. I want it so that I can choose a character in CharacterSelect page and then the character that I selected is the character that is in the GameView and that I am controlling. Right now I am just working with the images. In the GameView I am basically trying to set up a way to call an image of the corresponding character from the Characters class. If I could I would have an animation of the character but I'm just going to go step by step. All I want is the corresponding image for the character while he's facing right
Here is my code in my GameView.m for the function to basically create the image, and I know I need to call the image file from a variable in Characters. bluebox is like defined in the .h as a UIImageView and really it just contains all the things the character can do... such as the left and right buttons allows it to move and so on...
-(void)createCharacter
{
bluebox = [[UIImageView alloc] initWithFrame:
CGRectMake(70, 100, 150, 130)];
bluebox = [[UIImageView alloc] init];
}
In my Characters.m I made an NSString in my .h of Characters in it is called lookingRight1... And then for one of my characters I have this
-(void)megaMan
{
lookingRight1 = #"MegaManRight1.png";
}
Now I suppose I'd need to call looking right. I'm actually confusing my self trying to write this, so please help, if you don't get confused also. I don't have really much code for my CharacterSelect page but what I do have just links a particular button labeled with a character name to the GameView.
If you could please help I'd be extremely thankful. I think that it would help if you could show a mock second character also so that I can see what to do to get the character I want...
Sorry If this is confusing to you.
Related
I've created a .xib file with a uiview solely for the pdf document that I have created. I've primarily followed this tutorial for code:
http://www.raywenderlich.com/6818/how-to-create-a-pdf-with-quartz-2d-in-ios-5-tutorial-part-2
From the above, I can't edit labels (plain or attributed) from the interface builder as even after changing size, it doesn't apply when the app is run. (I suspect the issue may lie within the methods drawText or drawLabels).
I then tried to create an attributed string, however the methods don't take it. I tried to convert the drawtext by copying and taking the argument of an nsmutableattributedstring however this caused problems with the CFStringRef.
I appreciate your time for any help.
Solved it by making a separate method as below (I used + since I have this inside an NSObject and is a class method rather than in a UIViewController):
+(void)addText:(NSString*)text withFrame:(CGRect)frame withFont:(UIFont*)font;
{
[text drawInRect:frame withFont:font];
}
Outside the method, declaring inputs and calling it:
UIFont *font = [UIFont fontWithName:#Helvetica-Bold" size:7];
[self addText: yourStringHere
withFrame:CGRectMake(yourXPosition, yourYPOsition, yourFrameWidth, yourFrameHeight)
withFont:font];
I wonder if it's much simplified like so because the tutorial I used is now outdated?
If anything I hope this helps others :)
I am writing an iOS application for (among many features) calculating alcohol content from sugar before and after fermentation for homebrewers. Now the problem is; every time I run my app in the simulator, it crashes with "Thread 1: Signal SIGBART" once I enter the UIViewController with the text fields, labels and buttons used in this function (in the implementation):
- (IBAction)calcAlc:(id)sender {
double ogVal = [[oGtext text]floatValue];
double fgVal = [[fGtext text]floatValue];
double alcoContent = ((1.05*(ogVal-fgVal))/fgVal)/0.79;
NSString *theResult = [NSString stringWithFormat:#"%1.2f",alcoContent];
alcContent.text = theResult;
}
I'm really stuck here -- any help is very appreciated. Thanks in advance!
You should check if fgVal is ever 0, since you are dividing by fgVal.
You will also want to use doubleValue instead of floatValue, since you are declaring them as double.
I think you should try float in place of double.
Now put break points on each and every method and debug it to get the exact point where you application is getting crashed and then you will be able to find the solution.
Also be sure to connect each and every ib outlet and action in your storyboard or nib(whatever you are using).
Please notify if it works..:)
I have six on-screen buttons whose titles need to correspond to six elements in an NSMutableArray, when the value in the array changes, I also need the title to change with it. I am having trouble figuring out how to create that constantly updating line to the button, I'm still quiet new to objective-c development as well as Xcode.
I also need to make sure that when there is no value at that particular index of the array, the button cannot be clicked on
here is an example of one of the buttons
- (IBAction)card1Pressed:(id)sender {
if (self.userHasEnteredFirstNumber) {
if (!self.userHasEnteredSecondNumber) {
self.secondNumber = [sender currentTitle];
}
}
else{
self.firstNumber = [sender currentTitle];
}
}
The end goal is to have the user press two buttons, then chose weather to add, subtract, multiply, or divide them. After they pick one of those four operations, the values that the buttons were assigned to in the array will be removed and replaced with whatever the new number is. So after they do this once there will only be 5 numbers left in the array, then 4, then 3..... and so on.
The numbers will be drawn and added to an NSMutable array titled currentHand
UPDATE: Using UIOutletCollection I linked the buttons to the method like this
the link to the picture is here "sorry about not being able to directly post it but new users must have a reputation of 10 before they can"
link to photo of declaration and implementation with interface-builder of IBOutletCollection
was this correct?
the code for the header file regarding the IBOutletCollection is as follows "please note that this has been connected to the six buttons I want to use it with in interface builder, a picture of it is shown above"
#property (nonatomic,retain) IBOutletCollection (UIButton)NSArray *buttonArray;
the code in the implementation file regarding the IBOutletController is as follows
# synthesize buttonArray = _buttonArray;
You want to use Key-Value observing, check out this from the Apple documentation:
https://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/KeyValueObserving/KeyValueObserving.html#//apple_ref/doc/uid/10000177i
Okay okay, so essentially you have a 'Button'-Array, whose 'Caption' is served by a NSMutableArray, which can easily be changed around, correct?
Now, this is only how I'd do it, there may be better solutions out there, but here goes:
You need a 'change' interface, which is called EACH time, something happens to your NSMutableArray. For example (since I don't know WHAT exactly is in that array of yours):
- (void) ChangeArray:(int)IDofElement (NSString *)newValue {
[arr replaceObjectAtIndex:IDofElement withObject:newValue]; //Updates/Empties the indexed Element.
if(newValue != nil) {
[buttons[IDOfElement] setText:newValue];
}
buttons[IDOfElement].enabled = (newValue != nil); //Makes Button 'clickable'
}
Like this, each time the value inside that array of yours gets changed, the corresponding caption also gets updated. Of course you would need an array of the buttons for this to work, but I don't think that's the big problem.
Another possible solution: Save a reference to the button inside of the object that's stored in the array and whenever the value is changed, change the button's caption too.
Does this help? Mind you, this is not the 'perfect solution', but something I'd come up with.
Please also note, that this is just from the top of my head and probably faulty at some points. But it should be able to point you in the general direction.
I've been trying to work out how to use table views and I'm a little stuck if I'm honest. I wanted to use a tableview with a limited number of rows (say 50 max). It starts of empty, with 0 rows. Then I wanted to do something along the lines of:
[self logMessage:#"Waiting for response"];
Which inserts a new row at the bottom with the above text. If I do another call to this pseudo function:
[self logMessage:#"Server response received"];
It should insert yet another new row below the previous row, and ensure it is visible. Once the above limit of 50 is reached, and a new message is inserted, I wanted the oldest message to be removed. All of this would be scrollable, with the latest being visible by default.
Am I looking at the right thing to do this? Eventually, I was hoping to have this in a nice little drawer below the main window, which I can then toggle from the main menu if needed. But as I said, I can't work out how to use a table view properly, it doesn't seem to be as straight forward as other objects are.
Any example code would be greatly appreciated!
Since log viewer is a read-only application of a UITableView, the way you do it is rather straightforward once you understand the basics. Recall that table views rely on their data models to provide them with the correct information that needs to be displayed.
A data model for "the last fifty lines of log" could be as simple as an NSMutableArray: use insertObject:atIndex: to add lines, and removeLastObject to remove the "overflow" lines, like this:
NSMutableArray *logLines = [NSMutableArray array]; // <<== this goes into the init method
-(void) addLogLine:(NSString*)line {
[logLines insertObject:line atIndex:0];
while (logLines.count > 50) {
[logLines removeLastObject];
}
}
Now you can use logLines as your table's "model": the data provider can tell how many lines there are by looking at logLines.count; the content of each row in the table will be the object at the corresponding index in logLines, and so on. Take a look at the UITableView section of your favorite iOs tutorial for the "boilerplate code" that needs to be written in order to display array elements in a UITableView.
I have a tableview. One of the columns in the tableview uses an NSLevelIndicatorCell.
I want to be able to allow the user to edit the warn and critical values for the level indicator such that when they enter a value into a a "warning level" textbox, it changes the warn value of the level indicators being displayed in ALL of the tableview's rows.
I am very much a newbie with Objective-C so all I can figure out so far is that I must need a delegate method to watch the textbox BUT if I succeed in doing that, how on earth do I send the new value to the particular tableview column so that the update happens to ALL of the rows (i.e. how do I send what message to the tableview and target a cell within a column within a tableview)?
Here is the code to the solution I came up with should anyone need it.
- (IBAction)setWarningLevel:(id)sender {
double v;
NSScanner *ns = [NSScanner scannerWithString:[warnLevel stringValue]];
[ns scanDouble:&v];
[levelIndicator setWarningValue:v];
}
This is a textbook case for using Cocoa bindings. Just bind the value of the text field to the NSLevelIndicatorCell in your table view (do that in Interface Builder). The updates should happen automagically.
I think it should apply for all the cells in the table view if you apply the binding to the cell in IB. However if it doesn't, you will need to write a couple lines of code that set up the binding every time a new row in the table is created. That link above will explain everything in detail, but basically you will be setting up a Key-Value Observer relationship in code between the text field and the instance of the level indicator in the row being created.
I think you may have overdone it.
NSTextField subclasses NSControl, so you need to look in the docs for NSControl for a useful function.
Try re-writing it like this; assuming you're taking the value from a warnLevel textfield.
- (IBAction)setWarningLevel:(id)sender {
double v = [warnLevel doubleValue];
[levelIndicator setWarningValue:v];
}
Although this is usually shortened to this;
- (IBAction)setWarningLevel:(id)sender {
[levelIndicator setWarningValue:[warnLevel doubleValue]];
}
You should probably have some validation that the textfield has a valid number. If you're only choosing a couple of numbers have a look at using a stepper control.
Usually, with Cocoa, if you feel like you're jumping through too many hoops, there is sometimes an easier way.
Usually ;-)