Sparrow Forum

1. 

   fatumlegion
   Member

   Here's what I currently have setup:

   SPTexture *testBtnObject = [SPTexture textureWithContentsOfFile:@"testing.png"];
   SPButton *testBtn = [SPButton buttonWithUpState:testBtnObject];
   testBtn.x = 100;
   testBtn.y = 100;
   [self addChild:testBtn];
   [testBtn addEventListener:@selector(testBtn_Click:) atObject:self forType:SP_EVENT_TYPE_TRIGGERED];

   I have a method that looks like this:

   - (void)testBtn_Click:(SPEvent *)event
   {
   	testBtn.x = 200;
   	testBtn.y = 200;
   }

   Which obviously doesn't work, as testBtn was defined in a different scope. Do I need to make a declaration of TestBtn in the Game header file? How could I make it so that I can reference the object through all of my methods.

   Thanks!

   Posted 1 year ago #
2. 

   enbr
   Moderator

   Try this.

   - (void)testBtn_Click:(SPEvent *)event
   {
   	SPButton *testBtn = (SPButton *)event.target;
   	testBtn.x = 200;
   	testBtn.y = 200;
   }

   Posted 1 year ago #
3. 

   fatumlegion
   Member

   Thanks for the reply! That works out, but I'll have a player class that has an event that determines if the right or left side of the screen was touched, and if so, move the player left or right. I don't believe I'll be able to reference the target the same way in this situation.

   How would I go about making it so that I can refer to the player sprite through each method in the class?

   Posted 1 year ago #
4. 

   enbr
   Moderator

   How about store the player sprite in it's own class.
   Player would be an SPSprite subclass.
   Then you can put this in your .h file.

   #import "Player.h"
    
   Player *player;

   In the .m

   - (void)addPlayer {
   	player = [[Player alloc] init];
   	[self addChild:player];
   	[player release];
   }

   Whenever you need to access the player sprite, just use the "player" variable.

   Posted 1 year ago #
5. 

   fatumlegion
   Member

   Thanks! Appreciate the help. I'm very new to objective c, but I'm really liking the similarities between the Sparrow framework and AS3.0, as I'm very familiar with AS3.

   I assume it works like this: As you said, in the .h file you save the player object to memory, like:

   Player *player;

   Would that be in the .h of my Main / Scene, or in the Player.h? Inside of the player.m, would I create something like:

   - (void)addPlayer
   {
        player = [[Player alloc] init];
        [self addChild:player];
        [player release];
   }

   I use the release method to free player from the memory? Would I use release after I'm done with the player to free up memory?

   In my Game.m or Scene file, where would I make the declaration for Player, and so that I can use it through all of the methods in my .m file?

   Thanks for any help!

   Posted 1 year ago #
6. 

   enbr
   Moderator

   You would want to put both pieces of code in your main scene.

   Posted 1 year ago #
7. 

   fatumlegion
   Member

   Ancient post, but I'm wondering how I can refer to the player reference through all of my methods? Would I want to handle all of the player logic inside of the addPlayer() { // } method? Could I setup event listeners inside of the addPlayer (possibly rename to something more appropriate, such as handlePlayer). I want to be able to refer to my player reference inside of all methods (event listeners and anything else). How could I set this up?

   Currently, "player" is only reachable inside of the "addPlayer" scope. Wait actually, I'm analyzing over the bit:

   player = [[Player alloc] init];

   Does alloc bit enable the "player" to be accessed from all methods? What about the purpose for init?

   Thanks!

   Posted 1 year ago #
8. 

   jdanek
   Member

   Alloc and Init are used to get memory from the iphone.so....

   Alloc - Gets the memory for the Player class

   Init - Initializes the memory so you can use it.

   The entire line of
   player = [[Player alloc] init];
   can be broken down into 2 lines, 1 for alloc, and 1 for init. But using the 1 line is alot easier.

   So no alloc and init does not enable it to be used in all methods

   -JDanek

   Posted 12 months ago #

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