IOS 读取Json文件、读取plist文件

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从工程项目中读取文件的操作

（1）从工程项目中读取Json文件

    NSString* jsonStr = nil;         //第一种方法读取    NSString *mainBundleDirectory=[[NSBundle mainBundle] bundlePath];    NSString *path=[mainBundleDirectory stringByAppendingPathComponent:@"route_points_demo.json"];    NSURL *url=[NSURL fileURLWithPath:path];    NSData *data = [[NSData alloc] initWithContentsOfURL:url];    jsonStr=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];        //第二种方法读取    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"route_points_demo" ofType:@"json"];    jsonStr  = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];    NSData *jaonData   = [[NSData alloc] initWithData:[jsonStr dataUsingEncoding:NSUTF8StringEncoding]];    NSArray *allTrack = [NSJSONSerialization JSONObjectWithData:jaonData options:(NSJSONReadingMutableContainers) error:nil];

（2）从工程项目中读取plist文件

    NSString *addressPath = [[NSBundle mainBundle] pathForResource:@"address" ofType:@"plist"];    NSMutableDictionary *dict = [[NSMutableDictionary alloc]initWithContentsOfFile:addressPath];    self.provinces = [dict objectForKey:@"address"];        //取出address数组

（3）从项目文件中读取文件到NSData、NSString、NSFileHandle、NSFileManager实例中

    //第一种方法： NSFileManager实例方法读取数据    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDesktopDirectory, NSUserDomainMask, YES);    NSString* thepath = [paths lastObject];    thepath = [thepath stringByAppendingPathComponent:@"fd_list.txt"];    NSLog(@"桌面目录：%@", thepath);    NSFileManager* fm = [NSFileManager defaultManager];    NSData* data = [[NSData alloc] init];    data = [fm contentsAtPath:thepath];    NSLog(@"%@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);            //第二种方法： NSData类方法读取数据    data = [NSData dataWithContentsOfFile:thepath];    NSLog(@"NSData类方法读取的内容是：%@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);            //第三种方法： NSString类方法读取内容    NSString* content = [NSString stringWithContentsOfFile:thepath encoding:NSUTF8StringEncoding error:nil];    NSLog(@"NSString类方法读取的内容是：\n%@",content);            //第四种方法： NSFileHandle实例方法读取内容    NSFileHandle* fh = [NSFileHandle fileHandleForReadingAtPath:thepath];    data = [fh readDataToEndOfFile];    NSLog(@"NSFileHandle实例读取的内容是：\n%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

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