Question

我在iOS 8中遇到过MKMapview的一些奇怪行为。我有自定义视图（UIView的子类），其中包含MKMapview。

NMView -> MKMapView

NMView代码

#import "NMView.h"

@implementation NMView

@synthesize mapView;
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        frame=self.bounds;
        self.translatesAutoresizingMaskIntoConstraints=NO;
        mapView=[[MKMapView alloc]initWithFrame:frame];
        mapView.showsUserLocation=YES;
        [mapView setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
        [self setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
        mapView.delegate=self;
        [self addSubview:mapView];
        self.backgroundColor=[UIColor grayColor];
    }
    return self;
}
-(void)addCustomAnnotaion:(id<MKAnnotation>)annot{
  MKCoordinateRegion region=MKCoordinateRegionMake(annot.coordinate, MKCoordinateSpanMake(10.0f, 10.0f));
   [mapView setRegion:region];
    [mapView addAnnotation:annot];
   // [mapView selectAnnotation:annot animated:YES];
}

- (MKAnnotationView *)mapView:(MKMapView *)mapViews viewForAnnotation:(id <MKAnnotation>)annotation
{

    if ([annotation isKindOfClass:[MKUserLocation class]]){
        return nil;
    }
    static NSString * const identifier = @"MyCustomAnnotation";
    MKAnnotationView* annotationView = (MKAnnotationView*)[mapViews dequeueReusableAnnotationViewWithIdentifier:identifier];

    if (annotationView){
        annotationView.annotation = annotation;
    }
    else{
        annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
        annotationView.canShowCallout = YES;
        UIView *rightView=[[UIView alloc]initWithFrame:CGRectMake(5, 0, 80,50)];
        rightView.backgroundColor=[UIColor clearColor];

        UIButton* edit = [UIButton buttonWithType:UIButtonTypeCustom];
        [edit setImage:[UIImage imageNamed:@"editPOI"] forState:UIControlStateNormal];
        [edit addTarget:self action:@selector(editPoi:) forControlEvents:UIControlEventTouchUpInside];
        edit.backgroundColor=[UIColor clearColor];
        edit.frame=CGRectMake(15, 5, 30,30);

        UIButton* delButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [delButton setImage:[UIImage imageNamed:@"deletePOI"] forState:UIControlStateNormal];
        [delButton addTarget:self action:@selector(deletePoi:) forControlEvents:UIControlEventTouchUpInside];
        delButton.backgroundColor=[UIColor clearColor];
        delButton.frame=CGRectMake(55, 5, 30,30);

        [rightView addSubview:delButton];
        [rightView addSubview:edit];

        UIImageView *imgviewIcon=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 30, 30)];
        [imgviewIcon setImage:[UIImage imageNamed:@"pin.png"]];
        [annotationView setImage:[UIImage imageNamed:@"pin.png"]];
        [annotationView layoutIfNeeded];
        annotationView.leftCalloutAccessoryView=imgviewIcon;
        annotationView.rightCalloutAccessoryView=rightView;

    }

    return annotationView;

}
-(IBAction)editPoi:(id)sender{
    //edit
}
-(IBAction)deletePoi:(id)sender{
    //delete
}

我正在将NMView添加到我的视图控制器

NMView *nv=[[NMView alloc]initWithFrame:CGRectMake(5, 5, 300, 400)];
[self.view addSubview:nv];

现在我使用NMView的自定义方法向mapview添加注释，

MKPointAnnotation *point=[[MKPointAnnotation alloc]init];
point.coordinate=pinCoordinate;
point.title=@"test";
[nv addCustomAnnotaion:point];

我已经在iOS7中测试了它的工作正常：

enter image description here

但是在 iOS8 中选择注释整个 NMView变为空白。

是iOS 8的错误还是我做错了？请帮助..

修改

如果我以编程方式选择注释，那么在iOS 8中也会出现同样的问题。

[mapView selectAnnotation:annot animated:YES];

其他人基本面临这个问题??

iOS8空白屏幕。： enter image description here

我已在以下网址上传了项目： https://drive.google.com/file/d/0BxkVP7smm8Z6SnM1UjBxcjc5aDg/view?usp=sharing

请检查一下让我知道..

Answer 1

我不确定原因，但如果你删除这一行就行了：

self.translatesAutoresizingMaskIntoConstraints=NO;

参考： Views disappear when `translatesAutoresizingMaskIntoConstraints` set `NO`

Answer 2

这不是完整的解决方案，而是诊断问题的一步。

1-将以下内容添加到NMView类

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {

    NSLog(@"MapView: %@", mapView);

    //so that I can check the view hierarchy after the user taps on the annotation view
    [self performSelector:@selector(viewHierarchy) withObject:nil afterDelay:5];
}

- (void) viewHierarchy {

    NSLog(@"Self: %@", self); //set a break point here
    //inspect the view hierarchy by typing 'po [self recursiveDescription]' in the debugger 

}

'[po recursiveDescription]'的输出。查看NMView“frame = （ - 65 -113; 0 0）”的框架，可能是自动布局问题。

NMView：0x7fa63bc95390; frame = （ - 65 -113; 0 0）; autoresize = W + H; layer =＆gt; | ＆GT; | | ; layer =＆gt; | | | ＆GT; | | | | ＆lt; _MKMapLayerHostingView：0x7fa63bc9b0e0; frame =（0 0; 0 0）; layer =＆lt; _MKMapLayerHostingLayer：0x7fa63bc9bfe0＆gt;＆gt; | | | | | （层） | | | | | | （层） | | | ＆GT; | | | ＆GT; | | | | ＆GT; | | | | | ＆GT; | | | | | | ＆lt; _MKPopoverEmbeddingView：0x7fa63ef600f0; frame =（149.5 155; 0 0）; layer =＆gt; | | | | | | | ＆lt; _UIPopoverView：0x7fa63ef1e4e0; frame =（-84.5 -57; 170 57）; layer =＆gt; | | | | | | | | ＆GT; | | | | | | | | | ＆GT; | | | | | | | | | | ＆lt; _MKCalloutBackgroundMaskView：0x7fa63ef1f4e0; frame =（0 0; 170 57）; layer =＆gt; | | | | | | | | | | | ＆GT; | | | | | | | | | | | | ＆GT; | | | | | | | | | | | ＆GT; | | | | | | | | | | | | ＆GT; | | | | | | | | | | | | ＆GT; | | | | | | | | ＆GT; | | | | | | | | | ＆GT; | | | | | | | | | | ＆lt; _MKSmallCalloutPassthroughButton：0x7fa63ef60900; baseClass = UIControl; frame =（0 0; 170 57）; layer =＆gt; | | | | | | | | | | | ＆lt; _MKCalloutAccessoryWrapperView：0x7fa63d9f8c10; frame =（90 0; 80 50）; clipsToBounds = YES; layer =＆gt; | | | | | | | | | | | | ＆GT; | | | | | | | | | | | | | ＆GT; | | | | | | | | | | | | | | ＆GT; | | | | | | | | | | | | | ＆GT; | | | | | | | | | | | | | | ＆GT; | | | | | | | | | | ＆lt; _MKSmallCalloutContainerView：0x7fa63bcc4aa0; frame =（0 0; 170 44）; clipsToBounds = YES; layer =＆gt; | | | | | | | | | | | ＆lt; _MKCalloutAccessoryWrapperView：0x7fa63dc6d890; frame =（7 7; 30 30）; clipsToBounds = YES; layer =＆gt; | | | | | | | | | | | | ＆GT; | | | | | | | | | | ＆GT; | | | | | | | | | | ＆GT; | | | | | | | | | | ＆GT; | | ＆GT;

MKMapView在注释选择iOS8上显示为空白

2 个答案: