mapView minZoom only works on iPhone 5

[derekmpeterson]

[self.mapView setZoom:13.0f];
[self.mapView setMaxZoom:16.0f];
[self.mapView setMinZoom:13.0f];

These lines will set the zoom and constraints appropriately on a retina device (tested with iPhone 5), but setMinZoom is ignored entirely on non-retina devices.

Edit: I should point out, this is allowing me to zoom out further than the tilesource supports, but only on non-retina devices.

Edit 2: It doesn't seem to be retina causing the issue, it's the size difference with the iPhone 5. Zoom works properly on the iPhone 5, not on an iPhone 4S.

[MaximeLM]

Hi,

I can reproduce this issue simply by rotating the device. The minZoom property is reset by the line : self.minZoom = 0.0; // force new minZoom calculation in - (void)setFrame:(CGRect)frame (RMMapView.m).

Here's what the log says :

2013-08-21 22:11:08.057 New minZoom:16.100000  // when I assign the value
2013-08-21 22:11:27.821 New minZoom:2.000000   // after I rotate the device

This mechanism could be here to make sure that minZoom doesn't go below the clampedMinZoom value after a frame size change.

I fixed it by changing the line to : self.minZoom = _minZoom; which doesn't break the clampedMinZoom control.