<p>I have noticed that some apps like Safari and Mail show a loading indicator in the status bar (the bar at the very top of the phone) when they are accessing the network. Is there a way to do the same thing in SDK apps, or is this an Apple only thing?</p>

It's in UIApplication:
For Objective C:
Start:
```
```
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
```
```
End:
```
```
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
```
```
For swift :
Start
```
```
UIApplication.shared.isNetworkActivityIndicatorVisible = true
```
```
End
```
```
UIApplication.shared.isNetworkActivityIndicatorVisible = false
```
```