【发布时间】：2013-01-30 15:57:47
【问题描述】：
大家好，希望大家能帮到我：
- (IBAction) addPoints: (id) sender
{
NSArray *latitudePoints;
NSArray *longitudePoints;
BOOL flag = NO;
@try
{
switch (lugar)
{
case 0:
break;
case 1:
latitudePoints = @[@27.781361, @27.777894, @27.766683, @27.757066, @27.745613, @27.737327, @27.728247, @27.720827, @27.720866, @27.719083, @27.722266, @27.721097, @27.739263, @27.758177, @27.780688];
longitudePoints = @[@-15.714188, @-15.720175, @-15.726072, @-15.740874, @-15.746066, @-15.759544, @-15.763944, @-15.774408, @-15.764822, @-15.752658, @-15.735975, @-15.715497, @-15.718150, @-15.712244, @-15.713213];
flag = YES;
break;
case 2:
latitudePoints = @[@28.249792, @28.254583, @28.259865, @28.264000, @28.265621, @28.267694, @28.270308, @28.272192, @28.273966, @28.275698, @28.277723, @28.279901];
longitudePoints = @[@-16.841880, @-16.842477, @-16.842657, @-16.844832, @-16.848396, @-16.851215, @-16.852329, @-16.856142, @-16.859281, @-16.860882, @-16.862011, @-16.863116];
flag = YES;
break;
default:
[NSException raise:@"Unknown place" format:@"Unknown place"];
break;
}
// NSLog(@"Lugar %d Flag %d",lugar,flag);
if (flag && [longitudePoints count] == [latitudePoints count])
{
anotacionesMapa *point; // anotacionesMapa is a custom MKAnnotation class, just have title, subtitle and coord atribute
CLLocationCoordinate2D placePoint;
NSMutableArray *pointList = [[NSMutableArray alloc] initWithCapacity:[longitudePoints count]];
for (int c = 0; c < [longitudePoints count]; c++)
{
placePoint.latitude = [[latitudePoints objectAtIndex:c] doubleValue];
placePoint.longitude = [[longitudePoints objectAtIndex:c] doubleValue];
if (c % 2 == 0)
point = [[anotacionesMapa alloc] initWithTitle:[NSString stringWithFormat:@"[Picture here] Nothing"]
subtitle:@""
andCoordinate: placePoint];
else
point = [[anotacionesMapa alloc] initWithTitle:[NSString stringWithFormat:@"Something"]
subtitle:@"[Pic here] test"
andCoordinate: placePoint];
[self.mapView addAnnotation:point];
CLLocation *linePoint = [[CLLocation alloc] initWithLatitude:placePoint.latitude longitude:placePoint.longitude];
[pointList addObject: linePoint];
}
ruta = [[CSMapRouteLayerView alloc] initWithRoute:pointList
mapView:self.mapView];
}
}
@catch (NSException *exception)
{
UIAlertView *alert;
alert = [[UIAlertView alloc] initWithTitle:@"Error..."
message:[NSString stringWithFormat:@"%@", exception]
delegate:self
cancelButtonTitle:@"Aceptar"
otherButtonTitles:nil];
[alert show];
}
}
我有这段代码，然后我需要打印存储纬度和经度的 PuntosLT 和 PuntosLG 坐标之间的线，但是当它应该打印线时（实际上，这些线以蓝色打印，我想打印红色）MKMapView 被冻结，无法移动，也无法缩放，我认为它会出现错误并绘制不在坐标中的其他线条，最后我的注释中的自定义图像又是红色针脚，喜欢默认和标题，副标题等信息不起作用。
谢谢。
编辑：方法/构造函数
-(id) initWithRoute:(NSArray*)routePoints mapView:(MKMapView*)mapView
{
self = [super initWithFrame:CGRectMake(0, 0, mapView.frame.size.width, mapView.frame.size.height)];
[self setBackgroundColor:[UIColor clearColor]];
[self setMapView:mapView];
[self setPoints:routePoints];
// determine the extents of the trip points that were passed in, and zoom in to that area.
CLLocationDegrees maxLat = -90;
CLLocationDegrees maxLon = -180;
CLLocationDegrees minLat = 90;
CLLocationDegrees minLon = 180;
for(int idx = 0; idx < self.points.count; idx++)
{
CLLocation* currentLocation = [self.points objectAtIndex:idx];
if(currentLocation.coordinate.latitude > maxLat)
maxLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.latitude < minLat)
minLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.longitude > maxLon)
maxLon = currentLocation.coordinate.longitude;
if(currentLocation.coordinate.longitude < minLon)
minLon = currentLocation.coordinate.longitude;
}
MKCoordinateRegion region;
region.center.latitude = (maxLat + minLat) / 2;
region.center.longitude = (maxLon + minLon) / 2;
region.span.latitudeDelta = maxLat - minLat;
region.span.longitudeDelta = maxLon - minLon;
[self.mapView setRegion:region];
[self.mapView setDelegate:self];
[self.mapView addSubview:self];
return self;
}
【问题讨论】：
-
您的代码中缺少某些内容。您添加了 MKAnnotation 标签，但您似乎没有使用它。此外，更改变量名称以便它们可以用英文阅读将非常有用。
-
应用是否使用 ARC？另外，如果可能，请在
CSMapRouteLayerView中显示initWithRoute:mapView:的代码。 -
使用
@try/@catch非常不合可可！ -
嗨，@AnnaKarenina 我的应用程序使用 ARC，这是我为测试 MKMapView 而不是“官方”应用程序所做的尝试测试应用程序...我编辑并添加了该方法。那么Abizem为什么是un-Cocoa，你用什么来检查错误或者异常呢？因为可可抛出了太多异常...
-
我们使用 Exceptions 来捕获程序员错误，并使用 NSError 来处理运行时条件。有一个完整的Error Handling Programming Guide 值得您阅读。
标签： ios google-maps mkmapview mkannotation mkannotationview