当我的视图尝试加载时，应用程序崩溃，我得到这个堆栈：
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:]: nil string parameter'
这是我的代码，我真的不知道发生此次崩溃时的位置：
#import "Itineraire.h"
#import "SBMapView.h"
#import "SBRouteAnnotation.h"
#import "City.h"
#import "UICGRoutes.h"
#import "SBCheckPointViewController.h"
//#import "SBRouteDetailView.h"
@interface Itineraire(Private)
-(void)customInitialization;
@end
@implementation Itineraire(Private)
-(void)customInitialization
{
// do the initialization of class variables here..
mDirections = [UICGDirections sharedDirections];
mDirections.delegate = self;
}
@end
@implementation Itineraire
@synthesize map = mMap;
@synthesize startPoint = mStartPoint;
@synthesize endPoint = mEndPoint;
@synthesize loadBtn = mLoadBtn;
@synthesize annotationArray = mAnnotationArray;
@synthesize travelMode = mTravelMode;
@synthesize destination;
@synthesize routes;
@synthesize mAnnotations;
@synthesize mRouteArray;
@synthesize mRouteDetail;
//Invoked when the class is instantiated in XIB
-(id)initWithCoder:(NSCoder*)aDecoder
{
self = [super initWithCoder:aDecoder];
if( self)
{
[self customInitialization];
}
return self;
}
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
[self customInitialization];
}
return self;
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
self.title = @"Google Maps";
self.map = [[SBMapView alloc] initWithFrame:CGRectMake(0, 49, self.view.frame.size.width, self.view.frame.size.height)];
//self.map = [[SBMapView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 381)];
[self.view addSubview:mMap];
self.view.backgroundColor = [UIColor blackColor];
self.annotationArray = [[NSMutableArray alloc]init];
self.routes = [[UICGRoutes alloc]init];
if (mDirections.isInitialized) {
[self updateRoute];
}
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:YES];
}
- (void)viewWillDisappear:(BOOL)animated;
{
[super viewWillDisappear:YES];
}
#pragma mark -
#pragma mark Instance Methods
- (void)updateRoute
{ /*
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
UICGDirectionsOptions *options = [[[UICGDirectionsOptions alloc] init] autorelease];
options.travelMode = mTravelMode;
City *mFirstCity = [[[City alloc]init] autorelease];
mFirstCity.mCityName = @"Paris";//mStartPoint;
//[mDirections loadWithStartPoint:mFirstCity.mCityName endPoint:destination options:options];
//added
NSMutableArray * DestinationCityArray = [[NSMutableArray alloc]init];
[DestinationCityArray addObject:@"Berlin"];
[mDirections loadWithStartPoint:mFirstCity.mCityName endPoint:destination options:options];
*/
//
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
UICGDirectionsOptions *options = [[UICGDirectionsOptions alloc] init] ;
options.travelMode = mTravelMode;
City *mFirstCity = [[City alloc]init];
mFirstCity.mCityName = @"Amsterdam";//mStartPoint;
NSMutableArray *dest=[[NSMutableArray alloc]init];
[dest addObject:@"Berlin"];
[mDirections loadWithStartPoint:mFirstCity.mCityName endPoint:dest options:options];
}
-(void)loadRouteAnnotations
{
self.mRouteArray = [mDirections routeArray];
NSLog(@"mRouteArray %@",mRouteArray);
self.mAnnotations = [[NSMutableArray alloc]init];
for (int idx = 0; idx < [mRouteArray count]; idx++) {
NSArray *_routeWayPoints1 = [[mRouteArray objectAtIndex:idx] wayPoints];
NSArray *mPlacetitles = [[mRouteArray objectAtIndex:idx] mPlaceTitle];
self.annotationArray = [NSMutableArray arrayWithCapacity:[_routeWayPoints1 count]-2];
mLoadBtn.title = @"OFF";
mLoadBtn.target = self;
mLoadBtn.action = @selector(removeRouteAnnotations);
for(int idx = 0; idx < [_routeWayPoints1 count]-1; idx++)
{
mBetweenAnnotation = [[SBRouteAnnotation alloc] initWithCoordinate:[[_routeWayPoints1 objectAtIndex:idx]coordinate]
title:[mPlacetitles objectAtIndex:idx]
annotationType:SBRouteAnnotationTypeWayPoint];
[self.annotationArray addObject:mBetweenAnnotation];
}
[mAnnotations addObject:mAnnotationArray];
[self.map.mapView addAnnotations:[mAnnotations objectAtIndex:idx]];
NSLog(@"map %@",mMap);
}
}
-(void)showCheckpoints
{
SBCheckPointViewController *_Controller = [[SBCheckPointViewController alloc]initWithNibName:@"SBCheckPoints" bundle:nil];
[self.navigationController pushViewController:_Controller animated:YES];
NSMutableArray *arr = [[mDirections checkPoint] mPlaceTitle];
_Controller.mCheckPoints = arr ;
}
//
-(void)removeRouteAnnotations
{
NSMutableArray *mTempAnnotation;// = [mAnnotations retain];
for (int idx = 0; idx < [mTempAnnotation count]; idx++) {
[mMap.mapView removeAnnotations:[mTempAnnotation objectAtIndex:idx] ];
}
mLoadBtn.title = @"ON";
mLoadBtn.target = self;
mLoadBtn.action = @selector(loadRouteAnnotations);
}
#pragma mark <UICGDirectionsDelegate> Methods
- (void)directionsDidFinishInitialize:(UICGDirections *)directions {
[self updateRoute];
}
- (void)directions:(UICGDirections *)directions didFailInitializeWithError:(NSError *)error {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Map Directions" message:[error localizedFailureReason] delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[alertView show];
}
- (void)directionsDidUpdateDirections:(UICGDirections *)indirections {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
UICGPolyline *polyline = [indirections polyline];
NSArray *routePoints = [polyline routePoints];
[mMap loadRoutes:routePoints]; // Loads route by getting the array of all coordinates in the route.
UIToolbar *tools = [[UIToolbar alloc]
initWithFrame:CGRectMake(0.0f, 0.0f, 103.0f, 44.01f)]; // 44.01 shifts it up 1px for some reason
tools.clearsContextBeforeDrawing = NO;
tools.clipsToBounds = NO;
tools.tintColor = [UIColor colorWithWhite:0.305f alpha:0.0f]; // closest I could get by eye to black, translucent style.
// anyone know how to get it perfect?
tools.barStyle = -1; // clear background
NSMutableArray *buttons = [[NSMutableArray alloc] initWithCapacity:2];
// Create a standard Load button.
self.loadBtn = [[UIBarButtonItem alloc]initWithTitle:@"ON"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(loadRouteAnnotations)];
[buttons addObject:mLoadBtn];
// Add Go button.
UIBarButtonItem *mGoBtn = [[UIBarButtonItem alloc] initWithTitle:@"Go"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(showCheckpoints)];
[buttons addObject:mGoBtn];
// Add buttons to toolbar and toolbar to nav bar.
[tools setItems:buttons animated:NO];
UIBarButtonItem *twoButtons = [[UIBarButtonItem alloc] initWithCustomView:tools];
self.navigationItem.rightBarButtonItem = twoButtons;
//Add annotations of different colors based on initial and final places.
SBRouteAnnotation *startAnnotation = [[SBRouteAnnotation alloc] initWithCoordinate:[[routePoints objectAtIndex:0] coordinate]
title:mStartPoint
annotationType:SBRouteAnnotationTypeStart];
SBRouteAnnotation *endAnnotation = [[SBRouteAnnotation alloc] initWithCoordinate:[[routePoints lastObject] coordinate]
title:mEndPoint
annotationType:SBRouteAnnotationTypeEnd];
[mMap.mapView addAnnotations:[NSArray arrayWithObjects:startAnnotation, endAnnotation,nil]];
}
- (void)directions:(UICGDirections *)directions didFailWithMessage:(NSString *)message {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Map Directions" message:message delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[alertView show];
}
#pragma mark -
@end
我试图将我的代码放在一个新项目（空应用程序）上并且工作正常，我不理解该错误及其可能的原因。
修改
我试图通过消除来跟踪问题，当我删除此方法时，我的代码工作正常：
//Invoked when the class is instantiated in XIB
-(id)initWithCoder:(NSCoder*)aDecoder
{
self = [super initWithCoder:aDecoder];
if( self)
{
[self customInitialization];
}
return self;
}
然而，当我跑步时，我的应用程序不会显示两点之间的路线（应用程序的目的）。因此，这个方法对整个班级来说似乎很重要，因为没有它，我无法获得路线，而在另一侧，当它在那里时，应用程序崩溃了。我该如何处理这个矛盾？
答案 0 :(得分：2)
@Vince正在让你走上正轨。由于问题在于框架调用NSURL方法（在本例中为Google Maps），因此您需要调试传递给框架的内容。你有框架的来源吗？您可以在loadWithStartPoint:endPoint:options:]中设置断点以查看正在发生的情况。
我注意到的一件事是，当我认为它需要NSMutableArray时，您正在传递endPoint作为NSString参数。