我正在尝试为 iphone 制作一个计算器应用程序,所以现在我完成了所有操作,如果用户在文本字段中输入他的第一个数字,然后如果他点击“+”按钮,我想要测试字段切换或选项卡到另一个文本字段
那我该怎么做呢?这是标题
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
{
int a,b,c;
char op;
UILabel*operation,*result;
UITextField *num1,*num2;
}
@property (nonatomic)int a , b ,c;
@property (nonatomic)char po;
@property (nonatomic ,retain)IBOutlet UILabel*operation,*result;
@property (nonatomic ,retain)IBOutlet UITextField *num1,*num2;;
-(IBAction)sum:(id)sender;
-(IBAction)Calculate:(id)sender;
-(IBAction)Clear:(id)sender;
-(IBAction)hideKeyboard:(id)sender;
@end
.m 文件
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize operation,result,num1,num2,a,b,c,po;
-(IBAction)sum:(id)sender{
operation.text=@"+";
}
-(IBAction)hideKeyboard:(id)sender{
[num1 resignFirstResponder];
[num2 resignFirstResponder];
}
-(IBAction)Calculate:(id)sender{
//sum
a =num1.text.integerValue;
b= num2.text.integerValue;
c=num1.text.integerValue+num2.text.integerValue;
printf("%i >> %i",b,num2.text.integerValue);
[num1 resignFirstResponder];
[num2 resignFirstResponder];
result.text =[NSString stringWithFormat:@"%i + %i = %i",a,b,c];
}
-(IBAction)Clear:(id)sender{
[num1 resignFirstResponder];
[num2 resignFirstResponder];
num1.text=@"";
num2.text=@"";
operation.text=@"";
a=0;
b=0;
c=0;
result.text=@"";
op=' ';
}