iphone - Objc_msg发送和应用崩溃

当我尝试在模拟器(3.1.3，Xcode 3.1.4)上启动我的应用程序时，它显示objc_msgSend且应用程序未启动。仅当我分配NSMUtable数组时，才会发生这种情况
这是我的代码部分，
在viewDidLoad中，

 -(void)viewDidLoad{

   locationArray = [[NSMutableArray alloc] initWithObjects:@"new delhi", @"faridabad",@"meerut"];
   str1=[locationArray objectAtIndex:0];
   str2=[locationArray objectAtIndex:1];

      [super viewDidLoad];
 }

然后我想在以下方法中使用locationArray对象；

 -(CLLocationCoordinate2D) addressLocation1{

double latitude = 0.0;
double longitude = 0.0;
NSString *str= [locationArray NSString *str= [locationArray objectAtIndex:0];

    //NSString *str= @"new delhi"

NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@&output=csv",
                       [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString]];
NSArray *listItems = [locationString componentsSeparatedByString:@","];


if([listItems count] >= 4 && [[listItems objectAtIndex:0] isEqualToString:@"200"]) {
    latitude = [[listItems objectAtIndex:2] doubleValue];
    longitude = [[listItems objectAtIndex:3] doubleValue];
}
else {
    //Show error
}

CLLocationCoordinate2D location;
location.latitude = latitude;
location.longitude = longitude;


return location;

   }

仅当分配locationArray时出现问题，我怎么了，请帮忙
谢谢

最佳答案

locationArray = [[NSMutableArray alloc] initWithObjects:@"new delhi", @"faridabad",@"meerut"];
尝试
locationArray = [[NSMutableArray alloc] initWithObjects:@"new delhi", @"faridabad",@"meerut", nil];
从The NSArray docs中，您可以看到initWithObjects:需要以nil终止。如果您不想这样做，并且知道有多少，则可以使用initWithObjects:count: