一个户型图，定位不同的房间

800 * 800

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    // 1，初始化location Object数据；

    [self loadLocationData];

    // 2，显示背景图,加载标记点到图上；

    [self drawElements];

}

- (void)loadLocationData {

    _locationArray = [NSMutableArray arrayWithCapacity:10];

    NSMutableDictionary *dict0 = [NSMutableDictionary dictionary];

    [dict0 setValue:@"602.2606120434" forKey:@"pointx"];

    [dict0 setValue:@"543.5794669299" forKey:@"pointy"];

    [dict0 setValue:@"主卧" forKey:@"roomName"];

    LocationObject *locationObject0 = [[LocationObject alloc] initWithDict:dict0];

    [_locationArray addObject:locationObject0];

    NSMutableDictionary *dict1 = [NSMutableDictionary dictionary];

    [dict1 setValue:@"347.4274432379" forKey:@"pointx"];

    [dict1 setValue:@"376.4363277394" forKey:@"pointy"];

    [dict1 setValue:@"客餐厅" forKey:@"roomName"];

    LocationObject *locationObject1 = [[LocationObject alloc] initWithDict:dict1];

    [_locationArray addObject:locationObject1];

    NSMutableDictionary *dict2 = [NSMutableDictionary dictionary];

    [dict2 setValue:@"602.2606120434" forKey:@"pointx"];

    [dict2 setValue:@"156.2922013829" forKey:@"pointy"];

    [dict2 setValue:@"次卧" forKey:@"roomName"];

    LocationObject *locationObject2 = [[LocationObject alloc] initWithDict:dict2];

    [_locationArray addObject:locationObject2];

}

- (void)drawElements {

    CGFloat offsetX = 10;

    CGFloat offsetY = 50;

    CGFloat pWH = 800.0;

    CGFloat showWH = SCREEN_WIDTH - 2*offsetX;

    CGFloat scale = showWH/pWH;

    // 显示背景图

    CGRect frame = CGRectMake(offsetX, offsetY, showWH, showWH);

    UIImageView *imgView = [[UIImageView alloc] initWithFrame:frame];

    imgView.image = [UIImage imageNamed:@"huxing.png"];

    imgView.userInteractionEnabled = YES;

    [self.view addSubview:imgView];

    self.view.backgroundColor = [UIColor blackColor];

// 加载标记点到图上

    NSInteger count = [_locationArray count];

    CGFloat pointWH = 30;

    for (NSInteger i=0; i<count; i++) {

LocationObject *locationObject = _locationArray[i];

        CGRect pointFrame = CGRectMake(locationObject.pointX * scale - pointWH/2, locationObject.pointY * scale - pointWH/2, pointWH, pointWH);

        UIButton *pointBtn =  [[UIButton alloc] initWithFrame:pointFrame];

        pointBtn.userInteractionEnabled = YES;

        pointBtn.tag = i;

        pointBtn.backgroundColor = [UIColor grayColor];

        pointBtn.layer.cornerRadius = pointWH/2;

        pointBtn.layer.masksToBounds = YES;

        [pointBtn addTarget:self action:@selector(clickBtn:) forControlEvents:UIControlEventTouchUpInside];

        [imgView addSubview:pointBtn];

}

- (void)clickBtn:(id)sender {

    NSInteger i = ((UIButton *)sender).tag;

    LocationObject *locationObject = _locationArray[i];

    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:locationObject.name

                                                  message:@""

                                                  delegate:self

                                        cancelButtonTitle:@"取消"

                                        otherButtonTitles:@"打开", nil];

    [alert show];

}