ios - How to subtract coins once from each button action? -


i've place 3 buttons first button allows animation reveal other buttons, user should spend 10 points on each action.

meaning when press button #2 must lose 10 coins (-10 coins) same goes action #3. 

-(ibaction)btnhint:(id)sender {  [uiview beginanimations:nil context:null]; [uiview setanimationduration:0.5];   cgpoint center = [hints center]; center.x = 160; center.y = 230; [hints setcenter:center];  [uiview commitanimations]; hintview.text = @"founded in 1996, , sub of telecome";  if(minuspoint) { coins = coins -10;     //minus point     minuspoint = no;     } }  - (ibaction)firsthintq:(id)sender { hintview.text = @"founded in 1996, , sub of telecome";  }  - (ibaction)secondhintq:(id)sender {  [_candletwo setimage:[uiimage imagenamed:@"candle2_03.png"] forstate:uicontrolstatenormal]; hintview.text = @"type in text here 2";   }  - (ibaction)thirdhintq:(id)sender { hintview.text = @"type in third hint here"; [_candlethree setimage:[uiimage imagenamed:@"candle2_03.png"] forstate:uicontrolstatenormal];  }

and, how display -10 points on coins label?

make conins global of type int. let coin label coinlabel. make 3 bool global variable such btn1pressed,btn2pressed,btn3pressed. in viewdidload make btn1pressed = btn2pressed = btn3pressed =false;. this:

-(ibaction)btnhint:(id)sender {  [uiview beginanimations:nil context:null]; [uiview setanimationduration:0.5];   cgpoint center = [hints center]; center.x = 160; center.y = 230; [hints setcenter:center];  [uiview commitanimations]; hintview.text = @"founded in 1996, , sub of telecome"; }  - (ibaction)firsthintq:(id)sender { hintview.text = @"founded in 1996, , sub of telecome"; if(!btn1pressed) {      if((coins -10) >= 0){         coins = coins -10;         btn1pressed = true         coinlabel.text = [nsstring stringwithformat:@"%d",coins];     }     else{         //show alert user has not enough coins     } } }  - (ibaction)secondhintq:(id)sender {  [_candletwo setimage:[uiimage imagenamed:@"candle2_03.png"] forstate:uicontrolstatenormal]; hintview.text = @"type in text here 2"; if(!btn2pressed) {      if((coins -10) >= 0){         coins = coins -10;         btn2pressed = true         coinlabel.text = [nsstring stringwithformat:@"%d",coins];     }     else{         //show alert user has not enough coins     } }     }  - (ibaction)thirdhintq:(id)sender { hintview.text = @"type in third hint here"; [_candlethree setimage:[uiimage imagenamed:@"candle2_03.png"] forstate:uicontrolstatenormal]; if(!btn3pressed) {      if((coins -10) >= 0){         coins = coins -10;         btn3pressed = true         coinlabel.text = [nsstring stringwithformat:@"%d",coins];     }     else{         //show alert user has not enough coins     } } }

hope helps .. :)


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