iphone - 如何在实现文件中运行一个函数？

Question

我正在 iPhone 上做一个项目，我是个初学者。我正在制作 Tic Tac Toe 应用程序，我想制作一个函数，将轮次从 'X' 更改为 'O'

所以我试着输入这个

void setTurn(){
    SinglePlayer*SO=[[SinglePlayer alloc]init];
    SO .turn =1;
    if (SO.turn%2==0){
        SO->turnLabel.text=@"O Turn";
    }
    else SO->turnLabel.text=@"X Turn";
    SO.turn++;
}

SO 表示 SinglePlayerObject。

无论我在实现的头部定义了什么

当我尝试在方法下键入此方法时 putSign();

-(IBAction)PutSign2:(id)sender{
    if (turn%2 !=0){
        label2.text=@"X";
    }
    else if (turn%2 ==0){
        label2.text=@"O";
    }
}

它显示错误。

既然我有使用C++的经验，那么如何才能运行与C++相同的方法呢？

这是头文件

#import <UIKit/UIKit.h>

@interface SinglePlayer : UIViewController{

    IBOutlet UILabel*label1;
    IBOutlet UILabel*label2;
    IBOutlet UILabel*label3;
    IBOutlet UILabel*label4;
    IBOutlet UILabel*label5;
    IBOutlet UILabel*label6;
    IBOutlet UILabel*label7;
    IBOutlet UILabel*label8;
    IBOutlet UILabel*label9;

    BOOL Player;

    int turn;

    IBOutlet UILabel*turnLabel;


}
@property (nonatomic)int turn;
@property (nonatomic) BOOL Player;
-(IBAction)PutSign1:(id)sender;
-(IBAction)PutSign2:(id)sender;
-(IBAction)PutSign3:(id)sender;
-(IBAction)PutSign4:(id)sender;
-(IBAction)PutSign5:(id)sender;
-(IBAction)PutSign6:(id)sender;
-(IBAction)PutSign7:(id)sender;
-(IBAction)PutSign8:(id)sender;
-(IBAction)PutSign9:(id)sender;
void setTurn();


@end

这是未完成的实现

@implementation SinglePlayer
//Player=true = X
//Player=False= O
@synthesize Player;
@synthesize turn;

void setTurn(){
    SinglePlayer*SO=[[SinglePlayer alloc]init];

    SO .turn =1;
    if (SO.turn%2==0){
        SO->turnLabel.text=@"O Turn";

    }
    else SO->turnLabel.text=@"X Turn";
    SO.turn++;
}
//this code to put the sign in the button label:-
//[sender setTitle:@"X" forState:UIControlStateNormal];
-(IBAction)PutSign1:(id)sender{
    if (turn%2 !=0){
        label1.text=@"X";
    }
    else if (turn%2 ==0){
        label1.text=@"O";
    }
turnLabel.text=@"O Turn";
}
      putSign();
-(IBAction)PutSign2:(id)sender{
    if (turn%2 !=0){
        label2.text=@"X";
    }
    else if (turn%2 ==0){
        label2.text=@"O";

    }
}    
   putSign();

-(IBAction)PutSign3:(id)sender{
    if (turn%2 !=0){
        label3.text=@"X";
    }
    else if (turn%2 ==0){
        label3.text=@"O";

    }
}
 putSign();
-(IBAction)PutSign4:(id)sender{
    //[sender setTitle:@"X" forState:UIControlStateNormal];
}

putSign();

Answer 1

名字集会搞砸了；)我知道这听起来无关紧要，但我不会低估“命名的力量”

代码变得更容易读/写

---

总之...你没有函数——你有属于对象的方法:它的 [OBJECT executeMyMethod:myParam];