Objective-C NSString、NSArray、NSDictionary、NSData 存取至Document

//-(void)writeButtonAction:(id)sender{//    //获得沙盒路径//    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);//    //NSDocumentDirectory documents文件夹//    // NSUserDomainMask 用户根目录//    NSString * nowPath = [paths objectAtIndex:0];//    NSLog(@"%@",nowPath);//    /*//     *字符串写入//     *///    //为要添加的str创建一个文件  后缀写不写都行 必须创建 不然它不知道该存在哪里//    NSString * stringPath = [NSString stringWithFormat:@"%@/newStr.txt",nowPath];//    NSString * str = @"dfkl;ghadksjasfklfhdsaklk;bvhsadflvkdfbgjvbfgdsa.kfhdsaokfgds;k";//    [str writeToFile:stringPath atomically:YES encoding:NSUTF8StringEncoding error:NULL];//}////-(void)readButtonAction:(id)sender{//    //获得沙盒路径//    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);//    NSLog(@"%@",paths);//    NSString * nowPath = [paths objectAtIndex:0];//    //获得文件路径//    NSString * stringPath = [NSString stringWithFormat:@"%@/newStr.txt",nowPath];//    //取数据存入readStr//    NSString * readStr = [[[NSString alloc] initWithContentsOfFile:stringPath encoding:NSUTF8StringEncoding error:NULL] autorelease];//    NSLog(@"%@",readStr);//}///* *数组的存取 *///-(void)writeButtonAction:(id)sender{//    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];//    NSString * newPath = [NSString stringWithFormat:@"%@/array.txt",path];//    NSArray * arr = [NSArray arrayWithObjects:@"redColor",@"greenColor",@"blueColor", nil];//    [arr writeToFile:newPath atomically:YES];//    NSLog(@"write Done");//}////-(void)readButtonAction:(id)sender{//    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];//    NSString * newPath = [NSString stringWithFormat:@"%@/array.txt",path];//    NSArray * arr = [[[NSArray alloc]initWithContentsOfFile:newPath]autorelease];//    NSLog(@"%@",arr);//}/* *字典的存取 *///-(void)writeButtonAction:(id)sender{//    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];//    NSString * newPath = [NSString stringWithFormat:@"%@/dic.txt",path];//    NSDictionary * dic = [NSDictionary dictionaryWithObjectsAndKeys:@"value1",@"key1",@"value2",@"key2",@"value3",@"key3", nil];//    [dic writeToFile:newPath atomically:YES];//    NSLog(@"done!");//}////-(void)readButtonAction:(id)sender{//    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];//    NSString * newPath = [NSString stringWithFormat:@"%@/dic.txt",path];//    NSDictionary * dic = [[[NSDictionary alloc]initWithContentsOfFile:newPath] autorelease];//    NSLog(@"%@",dic);//}/* *NSData */-(void)writeButtonAction:(id)sender{    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];    NSString * newPath = [NSString stringWithFormat:@"%@/date.txt",path];    NSString * strDD = @"sdflas;fjsalgdj;aghdf;gdlfh";    //将字符串转换成date    NSData * date = [strDD dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];    [date writeToFile:newPath atomically:YES];}-(void)readButtonAction:(id)sender{    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];    NSString * newPath = [NSString stringWithFormat:@"%@/date.txt",path];    NSData * data = [NSData dataWithContentsOfFile:newPath];    //将data转换成字符串    NSString * string = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];    NSLog(@"%@",string);}