我的学习日志009：“密码生成器”

交代一下我做程序的工具：mac os x虚拟机10.9.3 Xcode6 百度^-^ 参考书iPhone30天精通

// ViewController.h

// 9

//

// Created by 李迪 on 15-7-26.

// Copyright (c) 2015年 李迪. All rights reserved.

//

#import <UIKit/UIKit.h>

#import <Foundation/Foundation.h>

@interface ViewController : UIViewController<UITextFieldDelegate>{

IBOutlet UITextField * passWord;

IBOutlet UITextField * passWordLength;

//两个文本框，分别用来显示密码和添加密码长度

IBOutlet UISwitch * includeUpperCase;

IBOutlet UISwitch * includeLowerCase;

IBOutlet UISwitch * includeNumbers;

//三个switch开关

}

@property UITextField * passWord;

@property UITextField * passWordLength;

@property UISwitch * includeUpperCase;

@property UISwitch * includeLowerCase;

@property UISwitch * includeNumbers;

-(IBAction)setPassWord;//生成密码按钮，按它生成密码

@end

// ViewController.m

// 9

//

// Created by 李迪 on 15-7-26.

// Copyright (c) 2015年 李迪. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()



@end

@implementation ViewController

@synthesize passWord,passWordLength,includeUpperCase,includeLowerCase,includeNumbers;

#define RANDOM_SEED() strandom(time(NULL))

#define RANDOM_INT(__MIN__,__MAX__) ((__MIN__)+random()%((__MAX__+1)-(__MIN__)))

//两个代理

//第一个代理是产生随机种子，使随机数产生时是真实的随机。

//第二个代理是生成一个随机数，这个随机数的取值范围是__MAX__和__MIN__之间的一个数，在本程序中的取值范围是在0～passWordChars－1；

// 也可以不使用代理，用rand()％(passWordChars-1)来实现。

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

UITouch *touch = [[event allTouches] anyObject];

if(touch.tapCount>=1){

[passWord resignFirstResponder];

[passWordLength resignFirstResponder];

}

}//这个方法是触摸屏幕的时候键盘也消失，之前第七个程序的时候学到的。

-(BOOL)textFieldShouldReturn:(UITextField *)textField{

if(textField == passWord)

[passWord resignFirstResponder];//按键盘的return按键收起键盘

if(textField == passWordLength)

[passWordLength resignFirstResponder];//按键盘的return按键收起键盘

return YES;

}//本方法是代理方法，要实现textFieldDelegate协议才能生效，实现协议的同时还要设置代理，即passWord.delegate = self passWordLength.delegate = self;(本程序是在viewDidLoad方法里面实现的)

-(IBAction)setPassWord{

NSInteger iPassWordLength = [passWordLength.text intValue];

//得到密码长度文本框里面的数字

BOOL bIncludeLowerCase = includeLowerCase.on;

BOOL bIncludeUpperCase = includeUpperCase.on;

BOOL bIncludeNumbers = includeNumbers.on;

//这三个布尔对象分别代表switch开关开启时的状态

NSString *passWordText = @"";

//passWoedText代表的是显示密码文本框里面的内容，开始时是空的

NSString *lowerCaseChars = @"abcdefghijklmnopqrstuvwxyz";

NSString *upperCaseChars = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ";

NSString *numbers = @"0123456789";

//三个字符串，分别是大写字母，小写字母和数字

NSString *passWordChars = @"";

//passWordChars表示需要满足的条件满足时，把所有可以使用的字符放到一起时的字符串

if(bIncludeLowerCase)

passWordChars = [NSString stringWithFormat:@"%@%@",passWordChars,lowerCaseChars];

if(bIncludeUpperCase)

passWordChars = [NSString stringWithFormat:@"%@%@",passWordChars,upperCaseChars];

if(bIncludeNumbers)

passWordChars = [NSString stringWithFormat:@"%@%@",passWordChars,numbers];

//几个if语句就是满足需要满足的情况，然后把所有可能用到的字符串整理到passWordChars字符串上

for(NSInteger i =0;i<iPassWordLength;i++){

int index = RANDOM_INT(0,[passWordChars length]-1);//这里用到的就是前面定义好的宏，取一个在passWordChars范围内的下标

NSRange range = NSMakeRange(index, 1);//定义一个范围，表示从下标index开始，1个字符

NSString *passWordChar = [passWordChars substringWithRange:range];//根据字符串得到一个子字符串

passWordText = [NSString stringWithFormat:@"%@%@",passWordText,passWordChar];//将子字符串添加到passWordText后面

}

passWord.text = passWordText;//在文本框上显示出来

}



- (void)viewDidLoad {

passWord.delegate = self;

passWordLength.delegate = self;

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end