学习练习--UI界面实现个人所得税计算

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window = [[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]];

    // Override point for customization after application launch.

    self.window.backgroundColor = [UIColorwhiteColor];

    [self.windowmakeKeyAndVisible];

    

    UILabel *welcomLb = [[UILabelalloc]initWithFrame:CGRectMake(80,20, 160,50)];

    welcomLb.text =@"个人所得税计算";

    welcomLb.textColor = [UIColorgreenColor];

    welcomLb.font =[UIFontboldSystemFontOfSize:22];

    welcomLb.shadowColor = [UIColorpurpleColor];

    welcomLb.shadowOffset =CGSizeMake(2,2);

    welcomLb.textAlignment =NSTextAlignmentCenter;

    [self.windowaddSubview:welcomLb];

    

    //输入工资

    UILabel *salaryLb = [[UILabelalloc]initWithFrame:CGRectMake(50,70, 80,40)];

    salaryLb.text =@"工资：";

    salaryLb.textAlignment =NSTextAlignmentLeft;

    [self.windowaddSubview:salaryLb];

    

    salaryTF = [[UITextFieldalloc]initWithFrame:CGRectMake(150,70, 140,40)];

    salaryTF.borderStyle =UITextBorderStyleRoundedRect;

    salaryTF.placeholder =@"请输入.......";

    salaryTF.keyboardType =UIKeyboardTypeNumberPad;

    [self.windowaddSubview:salaryTF];

    

    //个人所得税

    UILabel *taxOutLb = [[UILabelalloc]initWithFrame:CGRectMake(50,110, 80,40)];

    taxOutLb.textAlignment =NSTextAlignmentLeft;

    taxOutLb.text =@"应缴税：";

    [self.windowaddSubview:taxOutLb];

    

    taxOutTF = [[UITextFieldalloc]initWithFrame:CGRectMake(150,110, 140,40)];

    taxOutTF.userInteractionEnabled =NO;

    taxOutTF.borderStyle =UITextBorderStyleRoundedRect;

    taxOutTF.placeholder =@"应缴税......";

    [self.windowaddSubview:taxOutTF];

    

    //实际工资

    UILabel *factSalaryLb = [[UILabelalloc]initWithFrame:CGRectMake(50,150, 80,40)];

    factSalaryLb.text =@"真工资：";

    factSalaryLb.textAlignment =NSTextAlignmentLeft;

    [self.windowaddSubview:factSalaryLb];

    

    factSalaryTF = [[UITextFieldalloc]initWithFrame:CGRectMake(150,150, 140,40)];

    factSalaryTF.userInteractionEnabled =NO;

    factSalaryTF.borderStyle =UITextBorderStyleRoundedRect;

    factSalaryTF.placeholder =@"实际工资是......";

    [self.windowaddSubview:factSalaryTF];

    

    //两个按钮

    UIButton * calculateBtn = [UIButtonbuttonWithType:UIButtonTypeSystem];

    calculateBtn.frame =CGRectMake(60,220, 80,40);

    [calculateBtn setTitle:@"计算"forState:UIControlStateNormal];

    calculateBtn.backgroundColor = [UIColorgroupTableViewBackgroundColor];

    [calculateBtn setTitleColor:[UIColorgrayColor]forState:UIControlStateNormal];

    [calculateBtn addTarget:selfaction:@selector(calculateTax)forControlEvents:UIControlEventTouchUpInside];

    [self.windowaddSubview:calculateBtn];

    

    UIButton * taxOutBtn = [UIButtonbuttonWithType:UIButtonTypeSystem];

    taxOutBtn.backgroundColor = [UIColorgroupTableViewBackgroundColor];

    taxOutBtn.frame =CGRectMake(180,220, 80,40);

    [taxOutBtn setTitle:@"重置"forState:UIControlStateNormal];

    [taxOutBtn setTitleColor:[UIColorgrayColor]forState:UIControlStateNormal];

    [taxOutBtn addTarget:selfaction:@selector(resetAll)forControlEvents:UIControlEventTouchUpInside];

    [self.windowaddSubview:taxOutBtn];

    returnYES;

}

-(void)calculateTax{

    float salary = [[salaryTFtext]floatValue];

    if (salary !=0) {

        float exSalary;

        float a,b,factSalary;

        if (salary <7662) {

            exSalary = salary * ( 1 - (0.08 +0.02 + 0.005 +0.12));

        }else{

            exSalary = salary - (7662 *(0.08 +0.02 + 0.005 +0.12));

        }

        

        exSalary -= 3500;

        if (exSalary <=0) {

            a = 0; b =0;

        }elseif(exSalary <= 1500){

            a = exSalary * 0.03;

            b = 0;

        }elseif (exSalary <= 4500){

            a = exSalary * 0.1;

            b = 105;

        }elseif (exSalary <= 9000){

            a = exSalary * 0.2;

            b = 555;

        }elseif (exSalary <= 35000){

            a = exSalary * 0.25;

            b = 1005;

        }elseif(exSalary <= 55000){

            a = exSalary * 0.3;

            b = 2755;

        }elseif (exSalary <= 80000){

            a= exSalary * 0.35;

            b = 5505;

        }else{

            a = exSalary * 0.45;

            b = 13505;

        }

        factSalary = exSalary + 3500 -(a - b);

        taxOutTF.text = [NSStringstringWithFormat:@"%f",a - b];

        factSalaryTF.text = [NSStringstringWithFormat:@"%f",factSalary];

    }

}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{

    [salaryTFendEditing:NO];

    [taxOutTFendEditing:NO];

    [factSalaryTFendEditing:NO];

}

@end

实现了个人所得税和实际工资的计算

得到UITextField新用法

UITextField *tf = [[UITextField alloc]initWithFrame:CGRect(100,100,100,100)];
tf.userInteractionEnable = NO;//UITextField是否能读写
tf.keyboardType = UIKeyboardTypeNumberPad;//UITextField所触发的键盘类型
[self.window addSubview];

float a = [[tf text]floatValue];//获取tf中的float值

//重写系统方法，使键盘落下

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
[tf endEditing:NO];
}

复习:

UIView 和 UIButton小运用：view1-->view2   view1-->view3

//简单qq登录、注册页面（功能未实现，仅用于UIView之间跳转）

@implementation LHAppDelegate

-(void)logo{

    

    view1 = [[UIViewalloc]initWithFrame:CGRectMake(0,0, 320,480)];

    [self.windowaddSubview:view1];

    //背景图

    UIImageView *bgIV1 = [[UIImageViewalloc] initWithFrame:CGRectMake(0,0,320,480)];

    bgIV1.image = [UIImageimageNamed:@"1.jpg"];

    [view1addSubview:bgIV1];

    

    //欢迎行

    UILabel *welcomeLb = [[UILabelalloc] initWithFrame:CGRectMake(65,100,190,40)];

    welcomeLb.text =@"QQ，丰富你的生活";

    welcomeLb.textColor =[UIColorblueColor];

    welcomeLb.font = [UIFontsystemFontOfSize:20];

    [view1addSubview:welcomeLb];

    

    //账号行

    UILabel *unameLb = [[UILabelalloc] initWithFrame:CGRectMake(50,150,50,40)];

    UITextField *unameTf = [[UITextFieldalloc] initWithFrame:CGRectMake(120,150,150,40)];

    unameLb.text =@"QQ号：";

    unameLb.font = [UIFontsystemFontOfSize:14];

    unameTf.placeholder =@"请输入QQ号......";

    [view1addSubview:unameTf];

    unameTf.borderStyle =3;

    [view1addSubview:unameLb];

    

    //密码行

    UILabel *upwdLb = [[UILabelalloc] initWithFrame:CGRectMake(50,210,50,30)];

    UITextField *upwdTf = [[UITextFieldalloc] initWithFrame:CGRectMake(120,210,150,30)];

    upwdLb.text =@"密码：";

    upwdLb.font = [UIFontsystemFontOfSize:14];

    upwdTf.placeholder =@"请输入密码......";

    [view1addSubview:upwdTf];

    upwdTf.borderStyle =3;

    [view1addSubview:upwdLb];

    

    //登陆和注册行

    UIButton *loginBtn = [UIButtonbuttonWithType:UIButtonTypeSystem];

    loginBtn.frame =CGRectMake(115,260, 50,30);

    UIButton *regBtn = [UIButtonbuttonWithType:UIButtonTypeSystem];

    regBtn.frame =CGRectMake(205,260, 50,30);

    

    loginBtn.backgroundColor = [UIColorblueColor];

    regBtn.backgroundColor = [UIColorblueColor];

    

    [view1addSubview:loginBtn];

    [view1addSubview:regBtn];

    

    [loginBtn setTitle:@"登陆"forState:UIControlStateNormal];

    [regBtn setTitle:@"注册"forState:UIControlStateNormal];

    

    [loginBtn setTitleColor:[UIColorblackColor] forState:UIControlStateNormal];

    [regBtn setTitleColor:[UIColorblackColor] forState:UIControlStateNormal];

    

    [loginBtn addTarget:nilaction:@selector(login)forControlEvents:UIControlEventTouchUpInside];

    [regBtn addTarget:nilaction:@selector(reg)forControlEvents:UIControlEventTouchUpInside];

}

-(void)reg{

    [UIViewbeginAnimations:nilcontext:nil];

    [UIViewsetAnimationDuration:1];

    [UIViewsetAnimationDelegate:self];

    [UIViewsetAnimationTransition:UIViewAnimationTransitionCurlDownforView:self.windowcache:YES];

    [UIViewcommitAnimations];

    

    view2 = [[UIViewalloc]initWithFrame:CGRectMake(0,0, 320,480)];

    [self.windowaddSubview:view2];

    

    UIImageView *bgIV2 = [[UIImageViewalloc]initWithFrame:CGRectMake(0,0, 320,480)];

    bgIV2.image = [UIImageimageNamed:@"2.jpg"];

    [view2addSubview:bgIV2];

}

-(void)login{

    [UIViewbeginAnimations:nilcontext:nil];

    [UIViewsetAnimationDuration:1];

    [UIViewsetAnimationDelegate:self];

    [UIViewsetAnimationTransition:UIViewAnimationTransitionCurlDownforView:self.windowcache:YES];

    [UIViewcommitAnimations];

    

    view3 = [[UIViewalloc]initWithFrame:CGRectMake(0,0, 320,320)];

    [self.windowaddSubview:view3];

    

    UIImageView *bgIV3 = [[UIImageViewalloc]initWithFrame:CGRectMake(0,0, 320,480)];

    bgIV3.image = [UIImageimageNamed:@"3.jpg"];

    [view3addSubview:bgIV3];

}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window = [[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]];

    // Override point for customization after application launch.

    self.window.backgroundColor = [UIColorwhiteColor];

    [self.windowmakeKeyAndVisible];

    [selflogo];

    returnYES;

}