Question

我正在尝试根据NSDictionary内部的位置将数组中的对象添加到NSArray，但是只要NSDictionary被分配，应用就会崩溃。有什么想法吗？

NSString *venue_title = [venues objectAtIndex:[actionSheet tag]];
NSString *venue_address = [venues_full_address objectAtIndex:[actionSheet tag]];
NSString *venue_lat = [venues_lat objectAtIndex:[actionSheet tag]];
NSString *venue_lng = [venues_lng objectAtIndex:[actionSheet tag]];        
NSLog(@"%@, %@, %@, %@", venue_title, venue_address, venue_lat, venue_lng);        
NSDictionary *venue_details_dict = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:venue_title, venue_address, venue_lat, venue_lng, nil] forKeys:[NSArray arrayWithObjects:@"name", @"address", @"lat", "lng", nil]];

我在NSLog对象时看到所有正确的值，但NSDictionary使应用程序崩溃并出现EXC_BAD_ACCESS错误。我启用了NSZombies，但是当它经常显示崩溃时没有显示任何内容。关于这里发生了什么的任何想法？提前谢谢！

Answer 1

NSDictionary *venue_details_dict = [[NSDictionary alloc] initWithObjects:
     [NSArray arrayWithObjects:venue_title, venue_address, venue_lat, venue_lng, nil]
   forKeys:
     [NSArray arrayWithObjects:@"name", @"address", @"lat", "lng", nil]];

您忘记了@上的"lng"。吊杆。

Answer 2

为了更清晰，可以更容易看到这样的错误：

NSDictionary *venue_details_dict = [NSDictionary dictionaryWithObjectsAndKeys:
    venue_title,   @"name",
    venue_address, @"address",
    venue_lat,     @"lat",
    venue_lng,     @"lng",
    nil];

EXC_BAD_ACCESS与NSDictionary

2 个答案: