警告:"mapView"的本地声明隐藏了实例变量 [英] warning: local declaration of 'mapView' hides instance variable

问题描述

请问有人可以解释并帮助我如何解决该警告?提前谢谢.

please, can anybody explain and help me how to fix that warning?? thx in advance.

-(void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated {

        mapRegion=mapView.region; //first warning
    }
    -(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated  {

        newRegion=mapView.region; //second warning
        if(mapRegion.span.latitudeDelta>newRegion.span.latitudeDelta||mapRegion.span.longitudeDelta>newRegion.span.longitudeDelta)
            shouldAdjustZoom=NO;

    }

推荐答案

您已经有一个名为mapView的实例变量.

you have an instance variable with the name mapView already.

您可以将本地名称更改为其他名称.例如这样的

You can change the local name to something else. For example like this:

-(void)mapView:(MKMapView *)aMapView regionWillChangeAnimated:(BOOL)animated {

     mapRegion=aMapView.region; //first warning
}

-(void)mapView:(MKMapView *)aMapView regionDidChangeAnimated:(BOOL)animated  {
    newRegion=aMapView.region; //second warning
    if(mapRegion.span.latitudeDelta>newRegion.span.latitudeDelta||mapRegion.span.longitudeDelta>newRegion.span.longitudeDelta)
            shouldAdjustZoom=NO;
}

这篇关于警告:"mapView"的本地声明隐藏了实例变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！