- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
/**
沙盒中文件夾:
1.Documents : 存儲長久保存的數據
2.library:
Caches:存放的緩存,比如:視頻,音頻,圖片,小說等等
Perferences:存儲偏好設置,比如:應用程序是否是第一次啟動
保存用戶名和密碼.
3.tmp:存儲臨時文件,比如:下載的zip包,解壓后直接刪除.
*/
//1.獲取沙盒文件路徑
NSString *homePath= NSHomeDirectory();
NSLog(@"%@",homePath);
//NSUserDefaults 直接操作 Preferences 文件夾
/*
NSUserDefaults *userdefaults = [NSUserDefaults standardUserDefaults];
[userdefaults setBool:YES forKey:@"FirstLanch"];
[userdefaults setObject:@"Leo" forKey:@"userName"];
[userdefaults setObject:@"lanoulanou" forKey:@"password"];
[userdefaults synchronize]; //立即同步
*/
//1.需求:判斷用戶之前是否已經登錄,如果登錄則提示登錄成功,否則提示輸入用戶名和密碼,存儲到本地
//NSUserDefaults *userdefaults = [NSUserDefaults standardUserDefaults];
// if (![userdefaults objectForKey:@"account"] || ![userdefaults objectForKey:@"password"]) {
// //無效狀體,此時需要提醒用戶,輸入用戶名和密碼
// UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你之前沒有登錄" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"登錄", nil];
// //設置警示框樣式
// alertView.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput;
// [alertView show];
// [alertView release];
// }else{
// //有效登錄狀體,提示用戶,登錄成功
// UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你已經登錄" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:nil];
// [alert show];
// [alert release];
// }
//2.應用程序包得路徑
NSString *bundlePath = [[NSBundle mainBundle] bundlePath];
NSLog(@"%@",bundlePath);
return YES;
}
//點擊警示框的按鈕觸發的方法
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
switch (buttonIndex) {
case 1:
{
//獲取警示框上得的輸入框中的內容
NSString *accout = [alertView textFieldAtIndex:0].text;
NSString *password = [alertView textFieldAtIndex:1].text;
//持久化處理
NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
//將用戶名密碼存儲到沙盒中 Preferences 文件夾下
[user setObject:accout forKey:@"account"];
[user setObject:password forKey:@"password"];
[user synchronize];
}
break;
default:
break;
}
}
#import "RootViewController.h"
@interface RootViewController ()
@property (retain, nonatomic) IBOutlet UITextField *nameTextField;
@property (retain, nonatomic) IBOutlet UITextField *pswTextField;
@end
@implementation RootViewController
/**
*文件讀取支持的類型:(字符串,數組,字典,二進制數據 -- NSData)
1.寫入文件.
writeToFile:atomically:--針對於 數組,字典,二進制數據
writeToFile:atomically:encoding:error: --針對於字符串
2.從文件中讀取數據
[類名 類名WithContentsOfFile:(文件路徑)]; --- 針對於數組,字典,二進制數據
[類名 類名WithContentsOfFile:encoding:error:]; --- 針對字符串
3.VVVIP
對於數組,字典大容器來說,想要實現文件讀寫,必須保證容器中的元素也必須是字符串,數組,字典,二進制數據類型之一.
*/
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)writeBtn:(id)sender {
// //1.字符串寫入文件
// NSError *error = nil;
// //先讀取源文件中的內容
// NSString *oldStr = [NSString stringWithContentsOfFile:[self filePath] encoding:NSUTF8StringEncoding error:nil];
// //將原有數據與新數據拼接一起
//
//
//
// NSString *newStr = [oldStr stringByAppendingFormat:@"%@",self.nameTextField.text];
// if (!newStr) {
// newStr = self.nameTextField.text;
// }
// BOOL isSuccess = [newStr writeToFile:[self filePath] atomically:YES encoding:NSUTF8StringEncoding error:&error];
// if (isSuccess) {
// NSLog(@"寫入成功");
// }else{
// NSLog(@"寫入失敗");
// }
//2.數組寫入文件
// NSArray *dataArr = @[self.nameTextField.text, self.pswTextField.text];
//
//
//
// BOOL isSuccess = [dataArr writeToFile:[self filePath] atomically:YES];
//2.字典寫入文件
NSDictionary *dic = @{@"tf1":self.nameTextField.text,@"tf2":self.pswTextField.text};
[dic writeToFile:[self filePath] atomically:YES];
}
- (IBAction)readBtn:(id)sender {
// //1.字符串從文件中讀取
// NSString *text = [NSString stringWithContentsOfFile:[self filePath] encoding:NSUTF8StringEncoding error:nil];
// //2.讓第二個輸入框顯示
// self.pswTextField.text = text;
// NSArray *dataArr = [NSArray arrayWithContentsOfFile:[self filePath]];
// //第一個輸入框顯示第二個輸入框的內容,第二個輸入框顯示第一個輸入框的內容
// self.nameTextField.text = [dataArr lastObject];
// self.pswTextField.text = dataArr[0];
//3.字典從文件中讀取數據
NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:[self filePath]];
self.nameTextField.text = [dic objectForKey:@"tf2"];
self.pswTextField.text = [dic objectForKey:@"tf1"];
}
//獲取文件路徑
- (NSString *)filePath{
//1.獲取Document(存放持久保存的數據)文件夾路徑
//參數1:查找的文件路徑
//參數2:在那個域中查找
//參數3:是否顯示詳細路徑
NSString *doucumentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
//2.拼接上文件路徑
NSString *filtPath = [doucumentsPath stringByAppendingPathComponent:@"Leo.txt"];
NSLog(@"%@",filtPath);
return filtPath;
}
- (void)dealloc {
[_nameTextField release];
[_pswTextField release];
[super dealloc];
}
@end
#import "SecondViewController.h"
#import "Contact.h"
@interface SecondViewController ()
@property (retain, nonatomic) IBOutlet UITextField *secondNameTFd;
@property (retain, nonatomic) IBOutlet UITextField *secondPwdTFd;
@end
@implementation SecondViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//歸檔按鈕
- (IBAction)archiveFile:(id)sender {
Contact *contact = [[Contact alloc] initWithName:self.secondNameTFd.text gender:self.secondPwdTFd.text age:19 phoneNumber:@"332" motto:@"不成功便成仁"];
//1.創建歸檔工具對象
NSMutableData *mData =[NSMutableData data];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:mData];
//2.開始歸檔
[archiver encodeObject:contact forKey:@"Leo"];
//3.結束歸檔
[archiver finishEncoding];
//4.內存釋放
[contact release];
[archiver release];
//data寫入文件
BOOL isSuccess = [mData writeToFile:[self getFilePath] atomically:YES];
}
//反歸檔
- (IBAction)noArchiveFile:(id)sender {
//1.Data從本地讀取數據
NSData *data = [NSData dataWithContentsOfFile:[self getFilePath]];
//2.創建反歸檔工具
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
//3.開始反歸檔
Contact *contact = [unarchiver decodeObjectForKey:@"Leo"];
//4.結束反歸檔
[unarchiver finishDecoding];
//釋放
[unarchiver release];
//5.讀取數據
self.secondNameTFd.text = contact.phoneNumber;
self.secondPwdTFd.text = contact.name;
}
//獲取文件路徑的方法
- (NSString *)getFilePath{
//1.獲取 Documents 文件夾路徑
NSString *doucumentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
//2.拼接上存儲文件的路徑
NSString *filePath = [doucumentsPath stringByAppendingPathComponent:@"Leo.data"];
NSLog(@"%@",filePath);
return filePath;
}
- (void)dealloc {
[_secondNameTFd release];
[_secondPwdTFd release];
[super dealloc];
}
@end
Contact.h
#import <Foundation/Foundation.h>
@interface Contact : NSObject<NSCoding>
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *gender;
@property (nonatomic, assign) NSInteger age;
@property (nonatomic, copy) NSString *motto;
@property (nonatomic, copy) NSString *phoneNumber;
- (instancetype)initWithName:(NSString *)name gender:(NSString *)gender age:(NSInteger)age phoneNumber:(NSString *)phoneNumber motto:(NSString *)motto;
@end
Contact.m
#import "Contact.h"
@implementation Contact
- (instancetype)initWithName:(NSString *)name gender:(NSString *)gender age:(NSInteger)age phoneNumber:(NSString *)phoneNumber motto:(NSString *)motto{
if (self = [super init]) {
self.name = name;
self.gender = gender;
self.age = age;
self.phoneNumber = phoneNumber;
self.motto = motto;
}
return self;
}
/**
* 當一個對象進行歸檔是,自動調用該方法,為該對象的實例變量進行歸檔操作.
*
* @param aCoder <#aCoder description#>
*/
- (void)encodeWithCoder:(NSCoder *)aCoder{
//內部,要對每一個實例變量進行歸檔操作
[aCoder encodeObject:_name forKey:@"name"];
[aCoder encodeObject:_gender forKey:@"gender"];
[aCoder encodeObject:@(_age) forKey:@"age"];
[aCoder encodeObject:_motto forKey:@"motto"];
[aCoder encodeObject:_phoneNumber forKey:@"phoneNumber"];
}
//當對一個對象進行反歸檔操作時,自動調用該方法,為該方法的實例變量進行反歸檔操作
- (id)initWithCoder:(NSCoder *)aDecoder
{
if (self = [super init]) {
self.name = [aDecoder decodeObjectForKey:@"name"];
self.gender = [aDecoder decodeObjectForKey:@"gender"];
self.age = [[aDecoder decodeObjectForKey:@"age"] integerValue];
self.motto = [aDecoder decodeObjectForKey:@"motto"];
self.phoneNumber = [aDecoder decodeObjectForKey:@"phoneNumber"];
}
return self;
}
-(void)dealloc
{
self.name = nil;
self.gender = nil;
self.phoneNumber = nil;
self.motto = nil;
[super dealloc];
}
@end
