#pragma mark---NSString的寫入與讀取---  //1:獲取路徑  NSString *docunments = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];  //2:在該路徑下創建文件夾,文件夾名為字符串.txt  docunments = [docunments stringByAppendingString:@"/字符串.txt"];  //  NSLog(@"%@",docunments);  //3:編寫文本內容  NSString *str = @"大家一起來";  //4:將文本寫入到"字符串.txt"中  /*   writeToFile:文件路徑,在這里是documents atomically:YES(若為YES,則保證了文件的原子性,即先創建一個臨時文件,直到文件內容寫入成功再導入目標文件(字符串.txt),為NO,直接寫入目標文件里) encoding:編碼格式是個枚舉值 error:錯誤信息,一般為nil   */  BOOL result = [str writeToFile:docunments atomically:YES encoding:NSUTF8StringEncoding error:nil];  if (result) {    NSLog(@"我成功了");  }else{    NSLog(@"為啥失敗了");  }  //讀取  /*   stringWithContentsOfFile:路徑 encoding:編碼 error:nil,錯誤信息   */  NSString *newStr = [NSString stringWithContentsOfFile:docunments encoding:4 error:nil];  NSLog(@">>>>%@",newStr);  /*   .plist全名是：Property List，屬性列表文件，它是一種用來存儲串行化(當程序徹底退出后,對象就會隨之消亡,但是,我們希望有些東西需要記錄下來,以便于恢復,也可提升用戶體驗,而記錄的這個過程,就叫串行化)后的對象的文件。屬性列表文件的擴展名為.plist ，因此通常被稱為 plist文件。文件是xml格式的。   注意:plist文件通常用于存儲用戶設置,也可用于存儲捆綁信息   */#pragma mark---NSArray的寫入與讀取//獲取路徑  NSString *arrayDoc = [SandBox getDocuments];  //在arrayDoc下拼接文件名  NSString *arrPath = [arrayDoc stringByAppendingString:@"array.plist"];  //向數組中寫入數據  NSArray *array = @[@"25",@"55",@"05",@"5885"];  //將數組寫入文件  [array writeToFile:arrPath atomically:YES];  NSLog(@"數組存入路徑%@",arrPath);  //讀取  NSArray *newArray = [NSArray arrayWithContentsOfFile:arrPath];  NSLog(@"讀取的文件:%@",newArray);#pragma mark--- 字典的寫入與讀取----  NSString *dicionaryDic = [SandBox getDocuments];  NSString *dicpath = [dicionaryDic stringByAppendingString:@"dictionary.plist"];  NSDictionary *dictionary = @{@"name":@"甲甲",@"age":@"18"};  [dictionary writeToFile:dicpath atomically:YES];  NSLog(@"字典存入路徑%@",dicpath);  //讀取  NSDictionary *newdict = [NSDictionary dictionaryWithContentsOfFile:dicpath];  NSLog( @"讀取的字典文件%@",newdict);#pragma mark--- NSData----  NSString *DataPath = [[SandBox getDocuments]stringByAppendingString:@"Data.data"];// NSString *string = @"丑八怪";//  NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];  UIImage *image = [UIImage imageNamed:@"2"];  NSData *data = UIImageJPEGRepresentation(image, 0.5);  [data writeToFile:DataPath atomically:YES];  NSLog(@"%@",DataPath);  //讀取  NSData *newData = [NSData dataWithContentsOfFile:DataPath];//  NSString *new = [[NSString alloc]initWithData:newData encoding:4];  UIImage *new = [UIImage imageWithData:newData scale:1];  NSLog(@"%@",newData);  NSLog(@"%@",new);}