iOS（手势：拖拽，旋转，缩放）-室内地图-手势篇

2017-06-06 本文已影响134人 doublej_yjj

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //缩放手势
    pinchGestureRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self
                                                                       action:@selector(handlePinch:)];
    pinchGestureRecognizer.delegate = self;
    [mapBaseView addGestureRecognizer:pinchGestureRecognizer];
    //旋转手势
    UIRotationGestureRecognizer *rotateRecognizer;
    rotateRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self
                                                                    action:@selector(handleRotate:)];
    [mapBaseView addGestureRecognizer:rotateRecognizer];
    rotateRecognizer.delegate = self;
    //拖拽手势
    UIPanGestureRecognizer *panGestureRecognizer;
    panGestureRecognizer = [[UIPanGestureRecognizer alloc]initWithTarget:self
                                                                  action:@selector(handlePan:)];
    [mapBaseView addGestureRecognizer:panGestureRecognizer];
    
}

#pragma mark - 地图单元数据加载
-(void)nameJsonLabArr:(NSArray*)labNameArr
{
    if (muArr.count>0) {
        [muArr removeAllObjects];
    }
    for (int i =0;i<labNameArr.count;i++) {
        
        NSDictionary *dica = [labNameArr objectAtIndex:i];
        NSString *name = [dica objectForKey:@"name"];
        NSString *xx = [dica objectForKey:@"x"];
        NSString *yy = [dica objectForKey:@"y"];
        NSString *ww = [dica objectForKey:@"w"];
        NSString *hh = [dica objectForKey:@"h"];
        
        NSArray *arr1 = [[NSArray alloc]initWithObjects:x1,y1,x2,y2,x3,y3,x4,y4,name,nil];
        UILabel *labb = [[UILabel alloc]init];
        [muArr addObject:arr1];
        [labMutArr addObject:labb];
    }
}

#pragma mark - 地图手势
- (void)handlePan:(UIPanGestureRecognizer*) recognizer
{
    CGPoint translation = [recognizer translationInView:self.view];
    recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y);
    [recognizer setTranslation:CGPointZero inView:self.view];
}

缩放手势

- (void) handlePinch:(UIPinchGestureRecognizer*) recognizer
{
    mapBaseView.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale);
    for (int i=0; i<labMutArr.count; i++) {//使文字区域在地图缩放时大小不变
        UILabel *labb = [labMutArr objectAtIndex:i];
        labb.transform = CGAffineTransformScale(labb.transform,
                                                1/recognizer.scale,1/recognizer.scale);
    }
    [self recognizerUPdate:recognizer andType:1];//实时跟新地图手势中心点
    recognizer.scale = 1;
}

旋转手势

- (void) handleRotate:(UIRotationGestureRecognizer*) recognizer
{
    mapBaseView.transform = CGAffineTransformRotate(mapBaseView.transform, recognizer.rotation);
####使文字区域在地图旋转时保持水平就像百度高德等地图一样
    if (labMutArr.count>0){
            for (int i=0; i<labMutArr.count; i++) {
                UILabel *labb = [labMutArr objectAtIndex:i];
####关键代码
 labb.transform = CGAffineTransformRotate(labb.transform, -recognizer.rotation);
            }
        }
####
    [self recognizerUPdate:recognizer andType:2];//实时跟新地图手势中心点
    recognizer.rotation = 0;
}

设置map旋转缩放中心点，当手势操作时，设置map中心的为两指中心点

#pragma mark - 实时跟新地图手势中心点
- (void)recognizerUPdate:(id) recognizera andType:(int)type
{
    UIPinchGestureRecognizer *recognizer;
    if (type==1){
        recognizer = recognizera;
    }else{
        recognizer = recognizera;
    }
    if (recognizer.numberOfTouches==2) {
        CGPoint onoPoint = [recognizer locationOfTouch:0 inView:recognizer.view];
        CGPoint twoPoint = [recognizer locationOfTouch:1 inView:recognizer.view];
        CGPoint anchorPoint;
        anchorPoint.x = (onoPoint.x + twoPoint.x) / 2 / recognizer.view.bounds.size.width;
        anchorPoint.y = (onoPoint.y + twoPoint.y) / 2 / recognizer.view.bounds.size.height;
        [self setAnchorPoint:anchorPoint forView:recognizer.view];
    }
}
#pragma mark - 设立旋转中心点
- (void)setDefaultAnchorPointforView:(UIView *)view
{
    [self setAnchorPoint:CGPointMake(0.5f, 0.5f) forView:view];
}

#pragma mark -旋转中心点计算
- (void)setAnchorPoint:(CGPoint)anchorPoint forView:(UIView *)view
{
    CGPoint oldOrigin      = view.frame.origin;
    view.layer.anchorPoint = anchorPoint;
    CGPoint newOrigin      = view.frame.origin;
    CGPoint transition;
    transition.x = newOrigin.x - oldOrigin.x;
    transition.y = newOrigin.y - oldOrigin.y;
    view.center = CGPointMake (view.center.x - transition.x, view.center.y - transition.y);
}

多手势支持（同时支持旋转缩放）

//设置多手势支持
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer: (UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

效果如下：
http:https://img.haomeiwen.com/i6285199/a44856ab5563d092.gif?imageMogr2/auto-orient/strip