~~~ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]autorelease]; // Override point for customization after application launch. self.window.backgroundColor = [UIColor whiteColor]; [self.window makeKeyAndVisible]; /*HMTRootViewController * rootVC = [[HMTRootViewController alloc]init]; self.window.rootViewController = rootVC; [rootVC release];*/ // 1.獲取沙盒文件的主路徑 NSLog(@"home = %@",NSHomeDirectory()); // 2.獲取Documents的路徑(獲取Library的路徑類似) NSLog(@"documents = %@", [NSHomeDirectory() stringByAppendingString:@"/Documents"]); NSLog(@"documents = %@", [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]); NSLog(@"documents = %@",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]); // 3.獲取tmp的路徑(單獨的方法,與眾不同) NSLog(@"tmp = %@",NSTemporaryDirectory()); // 4.應用程序包.app-----只有讀取的權利,沒有修改的權利 NSLog(@".app = %@",[[NSBundle mainBundle] bundlePath]); NSLog(@"resource = %@",[[NSBundle mainBundle]resourcePath]); NSLog(@".exec = %@",[[NSBundle mainBundle] executablePath]); //[self simpleOperationOfApp]; [self complexOperationOfApp]; [self complexArrayOperationOfApp]; return YES; } #pragma mark - 簡單的數據文件write/read - (void)simpleOperationOfApp{ #pragma mark 字符串---txt // 1.獲取存儲文件的上一級路徑 NSString * documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; // 2.拼接一個完整的文件存儲路徑 NSString * filePath = [documentsPath stringByAppendingPathComponent:@"text.txt"]; // 3.write數據 NSString * saveString = @"我叫胡明濤"; [saveString writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil]; // 4.從文件中read NSString * readString = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil]; NSLog(@"%@",readString); #pragma mark 數組---plist NSString * cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]; NSString * arrayFilePath = [cachesPath stringByAppendingPathComponent:@"names.plist"]; NSArray * writeArray = @[@"吳凱",@"許珍珍",@"左友東"]; [writeArray writeToFile:arrayFilePath atomically:YES]; NSArray * readArray = [NSArray arrayWithContentsOfFile:arrayFilePath]; NSLog(@"%@",readArray); #pragma mark 字典---plist NSString * tmpPath = NSTemporaryDirectory(); NSString * dicFilePath = [tmpPath stringByAppendingPathComponent:@"dic.plist"]; NSDictionary * writeDic = @{@"name": @"HMT",@"sex":@"female"}; [writeDic writeToFile:dicFilePath atomically:YES]; NSDictionary * readDic = [NSDictionary dictionaryWithContentsOfFile:dicFilePath]; NSLog(@"%@",readDic); // 修改數據 [readDic setValue:@"humingtao" forKey:@"name"]; [readDic writeToFile:dicFilePath atomically:YES]; NSLog(@"%@",readDic); #pragma mark NSData // 獲取圖片對象 UIImage * writeImage = [UIImage imageNamed:@"OJ2NMBNXQ1G5_20121120051201760"]; // 圖片對象轉變為NSData類型 NSData * writeData = UIImagePNGRepresentation(writeImage); NSString * imageFilePath = [documentsPath stringByAppendingPathComponent:@"美女.png"]; [writeData writeToFile:imageFilePath atomically:YES]; NSData * readData = [NSData dataWithContentsOfFile:imageFilePath]; // imageNamed------圖片會存入緩存,下次加載很迅速,但是耗內存,圖片一大就嗝屁了 UIImage * readImage = [UIImage imageWithData:readData]; // 從文件路徑中找,調用一次就重新加載一次,只是顯示圖片,不加載到內存(后綴名不要加".") [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"美女" ofType:@"png"]]; NSLog(@"%@",readImage); NSLog(@"%@",[UIImage imageWithContentsOfFile:imageFilePath]); } #pragma mark - 單個--復雜的數據對象write/read-------NSCoding協議 - (void)complexOperationOfApp{ UIButton * archiver = [UIButton buttonWithType:UIButtonTypeSystem]; archiver.frame = CGRectMake(20, 100, 100, 40); [archiver setTitle:@"歸檔(序列化)" forState:UIControlStateNormal]; [archiver addTarget:self action:@selector(onClickArchiverButton:) forControlEvents:UIControlEventTouchUpInside]; [self.window addSubview:archiver]; UIButton * unArchiver = [UIButton buttonWithType:UIButtonTypeSystem]; unArchiver.frame = CGRectMake(160, 100, 120, 40); [unArchiver setTitle:@"反歸檔(反序列化)" forState:UIControlStateNormal]; [unArchiver addTarget:self action:@selector(onClickUnArchiverButton:) forControlEvents:UIControlEventTouchUpInside]; [self.window addSubview:unArchiver]; } #pragma mark 對復雜的數據對象進行寫入操作.原理:復雜的數據對象序列化為NSData,將NSData寫入文件,實現數據持久化 - (void)onClickArchiverButton:(UIButton *)button{ /** * 1.自定義復雜的數據類型,例如ABPerson * (1)ABPerson必須實現NSCoding協議的方法 * (2)ABPerson中的實例變量或屬性,也必須實現NSCoding協議的方法 * (3)ABPerson中的基本數據類型沒有過多限制 * 2.創建一個序列化工具對象 * 3.先找路徑 * 4.對復雜的數據類型對象進行序列化 * 5.結束 finishEncoding * 6.NSData寫入 */ HMTABPerson * person = [[HMTABPerson alloc]init]; person.name = @"HMT"; person.age = 25; NSMutableData * archiverData = [NSMutableData data]; NSKeyedArchiver * archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:archiverData]; [archiver encodeObject:person forKey:@"PersonKey"]; [archiver finishEncoding]; NSString * documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject]; NSString * filePath = [documents stringByAppendingPathComponent:@"person.data"]; [archiverData writeToFile:filePath atomically:YES]; [person release]; [archiver release]; } #pragma mark 從文件中讀取數據來實例化復雜對象數據操作 - (void)onClickUnArchiverButton:(UIButton *)button{ /** * 1.先找路徑 * 2.NSData讀出 * 3.創建一個反序列化工具 * 4.反序列化 * 5.結束 finishDecoding * 6.操作對象了 */ NSString * documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject]; NSString * filePath = [documents stringByAppendingPathComponent:@"person.data"]; NSData * unarchiverData = [NSData dataWithContentsOfFile:filePath]; NSKeyedUnarchiver * unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:unarchiverData]; HMTABPerson * person = [unarchiver decodeObjectForKey:@"PersonKey"]; [unarchiver finishDecoding]; NSLog(@"%@",person.name); [unarchiver release]; } #pragma mark - 數組--復雜的數據對象write/read-------NSCoding協議 - (void)complexArrayOperationOfApp{ UIButton * archiver = [UIButton buttonWithType:UIButtonTypeSystem]; archiver.frame = CGRectMake(20, 200, 100, 40); [archiver setTitle:@"歸檔(序列化)" forState:UIControlStateNormal]; [archiver addTarget:self action:@selector(onClickArchiverArrayButton) forControlEvents:UIControlEventTouchUpInside]; [self.window addSubview:archiver]; UIButton * unArchiver = [UIButton buttonWithType:UIButtonTypeSystem]; unArchiver.frame = CGRectMake(160, 200, 120, 40); [unArchiver setTitle:@"反歸檔(反序列化)" forState:UIControlStateNormal]; [unArchiver addTarget:self action:@selector(onClickUnArchiverArrayButton) forControlEvents:UIControlEventTouchUpInside]; [self.window addSubview:unArchiver]; } #pragma mark 寫入 - (void)onClickArchiverArrayButton{ NSMutableData * archiverData = [NSMutableData data]; NSKeyedArchiver * archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:archiverData]; HMTABPerson * person1 = [[HMTABPerson alloc]init]; person1.name = @"陳鳳長"; person1.age = 24; HMTABPerson * person2 = [[HMTABPerson alloc]init]; person2.name = @"胡明濤"; person2.age = 24; NSArray * personArray = @[person1,person2]; [archiver encodeObject:personArray forKey:@"PersonArrayKey"]; [archiver finishEncoding]; NSString * tmpPath = NSTemporaryDirectory(); NSString * filePath = [tmpPath stringByAppendingPathComponent:@"personArray.plist"]; [archiverData writeToFile:filePath atomically:YES]; [person1 release]; [person2 release]; [archiver release]; } #pragma mark 讀取 - (void)onClickUnArchiverArrayButton{ NSString * tmpPath = NSTemporaryDirectory(); NSString * filePath = [tmpPath stringByAppendingPathComponent:@"personArray.plist"]; NSData * unarchiverData = [NSData dataWithContentsOfFile:filePath]; NSKeyedUnarchiver * unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:unarchiverData]; NSArray * personArray = [unarchiver decodeObjectForKey:@"PersonArrayKey"]; [unarchiver finishDecoding]; HMTABPerson * person1 = [personArray objectAtIndex:0]; HMTABPerson * person2 = [personArray objectAtIndex:1]; NSLog(@"%@ %@",person1.name,person2.name); [unarchiver release]; } ~~~ HMTABPerson.h ~~~ #import <Foundation/Foundation.h> @interface HMTABPerson : NSObject <NSCoding> @property (nonatomic,assign)int age; @property (nonatomic,copy) NSString * name; @end ~~~ HMTABPerson.m ~~~ #import "HMTABPerson.h" @implementation HMTABPerson - (void)dealloc{ [_name release]; [super dealloc]; } // 序列化,編碼 - (void)encodeWithCoder:(NSCoder *)aCoder{ [aCoder encodeObject:_name forKey:@"NameKey"]; [aCoder encodeInt:_age forKey:@"AgeKey"]; } // 反序列化,解碼 - (id)initWithCoder:(NSCoder *)aDecoder{ if (self = [super init]) { self.name = [aDecoder decodeObjectForKey:@"NameKey"]; self.age = [aDecoder decodeIntForKey:@"AgeKey"]; } return self; } @end ~~~