OC中使用UI自己定义控件实现计算器的设计（版本号1简单的加减乘除，连加，连减，连除，连乘）

OC中使用UI自己定义控件实现计算器的设计（版本号1简单的加减乘除，连加。连减，连除，连乘）

#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