In OC, the User-Defined UI control is used to implement the calculator design (version 1 is simple addition, subtraction, multiplication, addition, subtraction, division, and multiplication), ocui

In OC, the User-Defined UI control is used to implement the calculator design (version 1 is simple addition, subtraction, multiplication, addition, subtraction, division, and multiplication), ocui

In OC, the UI custom control is used to implement the calculator design (version 1 is simple addition, subtraction, multiplication, and division, addition, subtraction, division, and multiplication)

#import <UIKit/UIKit.h>@interface ViewController : UIViewController<UIApplicationDelegate>{    float _operator1;    float _operator2;    float _result;}@end

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    UITextField * textFied1 = [[UITextField alloc]initWithFrame:CGRectMake(10, 30, 300 ,50)];    textFied1.borderStyle = UITextBorderStyleLine;    textFied1.backgroundColor = [UIColor redColor];    [self.view addSubview:textFied1];    textFied1.clearButtonMode = UITextFieldViewModeAlways;    textFied1.tag = 007;                UIButton * btn1 = [UIButton buttonWithType:UIButtonTypeCustom];    btn1.Frame=CGRectMake(10, 90, 70, 70);    btn1.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn1];    [btn1 setTitle:@"7" forState:UIControlStateNormal];        [btn1 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];    btn1.tag = 7;          UIButton * btn2 = [UIButton buttonWithType:UIButtonTypeCustom];    btn2.Frame=CGRectMake(85, 90, 70, 70);    btn2.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn2];    [btn2 setTitle:@"8" forState:UIControlStateNormal];    btn2.tag = 8;        [btn2 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];            UIButton * btn3 = [UIButton buttonWithType:UIButtonTypeCustom];    btn3.Frame=CGRectMake(160, 90, 70, 70);    btn3.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn3];    [btn3 setTitle:@"9" forState:UIControlStateNormal];    btn3.tag = 9;       [btn3 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn4 = [UIButton buttonWithType:UIButtonTypeCustom];    btn4.Frame=CGRectMake(235, 90, 70, 70);    btn4.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn4];    [btn4 setTitle:@"/" forState:UIControlStateNormal];    btn4.tag = 13;       [btn4 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn5 = [UIButton buttonWithType:UIButtonTypeCustom];    btn5.Frame=CGRectMake(10, 165, 70, 70);    btn5.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn5];    [btn5 setTitle:@"4" forState:UIControlStateNormal];    btn5.tag = 4;        [btn5 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn6 = [UIButton buttonWithType:UIButtonTypeCustom];    btn6.Frame=CGRectMake(85, 165, 70, 70);    btn6.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn6];    [btn6 setTitle:@"5" forState:UIControlStateNormal];    btn6.tag = 5;    [btn6 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];            UIButton * btn7 = [UIButton buttonWithType:UIButtonTypeCustom];    btn7.Frame=CGRectMake(160, 165, 70, 70);    btn7.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn7];     [btn7 setTitle:@"6" forState:UIControlStateNormal];    btn7.tag = 6;   [btn7 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];            UIButton * btn8 = [UIButton buttonWithType:UIButtonTypeCustom];    btn8.Frame=CGRectMake(235, 165, 70, 70);    btn8.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn8];     [btn8 setTitle:@"X" forState:UIControlStateNormal];    btn8.tag = 12;    [btn8 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn9 = [UIButton buttonWithType:UIButtonTypeCustom];    btn9.Frame=CGRectMake(10, 240, 70, 70);    btn9.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn9];    [btn9 setTitle:@"1" forState:UIControlStateNormal];    btn9.tag = 1;     [btn9 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn10 = [UIButton buttonWithType:UIButtonTypeCustom];    btn10.Frame=CGRectMake(85, 240, 70, 70);    btn10.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn10];     [btn10 setTitle:@"2" forState:UIControlStateNormal];    btn10.tag = 2;    [btn10 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];            UIButton * btn11 = [UIButton buttonWithType:UIButtonTypeCustom];    btn11.Frame=CGRectMake(160, 240, 70, 70);    btn11.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn11];     [btn11 setTitle:@"3" forState:UIControlStateNormal];    btn11.tag = 3;   [btn11 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];            UIButton * btn12 = [UIButton buttonWithType:UIButtonTypeCustom];    btn12.Frame=CGRectMake(235, 240, 70, 70);    btn12.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn12];     [btn12 setTitle:@"-" forState:UIControlStateNormal];    btn12.tag = 11;   [btn12 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn13 = [UIButton buttonWithType:UIButtonTypeCustom];    btn13.Frame=CGRectMake(10, 315, 70, 70);    btn13.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn13];     [btn13 setTitle:@"0" forState:UIControlStateNormal];    btn13.tag = 0;   [btn13 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn14 = [UIButton buttonWithType:UIButtonTypeCustom];    btn14.Frame=CGRectMake(85, 315, 145, 70);    btn14.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn14];     [btn14 setTitle:@"=" forState:UIControlStateNormal];    btn14.tag = 14;   [btn14 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        UIButton * btn15 = [UIButton buttonWithType:UIButtonTypeCustom];    btn15.Frame=CGRectMake(235, 315, 70, 70);    btn15.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn15];    [btn15 setTitle:@"+" forState:UIControlStateNormal];    btn15.tag = 10;    [btn15 addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];        // Do any additional setup after loading the view, typically from a nib.}//enum calCul//{//    add,//    sub,//    mul,//    mod//};////typedef enum calCul calCul;int count;-(void)btnClick:(UIButton *)btn{    NSString * str = [[NSString alloc]init];    if (btn.tag == 0) {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"0";        //_operator1 = 0;                field.text = str;    }    else if(btn.tag==1)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"1";        //_operator2 = 1;        field.text = str;    }    else if(btn.tag==2)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"2";        field.text = str;    }    else if(btn.tag==3)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"3";        field.text = str;    }    else if(btn.tag==4)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"4";        field.text = str;    }    else if(btn.tag==5)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"5";        field.text = str;    }    else if(btn.tag==6)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"6";        field.text = str;    }    else if(btn.tag==7)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"7";        field.text = str;    }    else if(btn.tag==8)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"8";        field.text = str;    }    else if(btn.tag==9)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"9";        field.text = str;    }    else if(btn.tag==10)    {        count = 1;        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        //str = @"+";        str = field.text;        //_result = _operator1;        _operator1 = [str doubleValue];                //str = [[NSString alloc]initWithFormat:@"%.2f",_result];        field.text = str;    }    else if(btn.tag==11)    {        count = 2;        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        //str = @"-";        //_result = _operator1 + _operator2;        str = field.text;        _operator1 = [str doubleValue];        field.text = str;    }    else if(btn.tag==12)    {        count = 3;        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        //str = @"*";        str = field.text;        _operator1 = [str doubleValue];        field.text = str;    }    else if(btn.tag==13)    {        count = 4;        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        //str = @"/";        str = field.text;        _operator1 = [str doubleValue];        field.text = str;    }    else if(btn.tag==14)    {        UITextField * field = ( UITextField * )[self.view viewWithTag:007];        str = @"=";        str = field.text;        _operator2 = [str doubleValue];        if (count==1) {            _result = _operator1 + _operator2;        }        else if(count == 2)        {        _result = _operator1 - _operator2;        }        else if(count == 3)        {        _result = _operator1 * _operator2;        }        else if(count==4)        {        _result = _operator1 / _operator2;        }        str = [[NSString alloc]initWithFormat:@"%.6f",_result];        field.text = str;    }    }-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{    return YES;}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

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