Fix crash when using swift custom cells with xib files (#1038) (#1040)

Author: julienpouget

Examples/Swift/SwiftExample/AppDelegate.swift

@@ -17,9 +17,9 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
 
         // Declare custom rows
-        XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeRate] =  "XLFormRatingCell"
+        XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeRate] =  NSStringFromClass(XLFormRatingCell.self)
         XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeFloatLabeledTextField] = FloatLabeledTextFieldCell.self
-        XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeWeekDays] = "XLFormWeekDaysCell"
+        XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeWeekDays] = NSStringFromClass(XLFormWeekDaysCell.self)
         XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeSegmentedInline] = InlineSegmentedCell.self
         XLFormViewController.cellClassesForRowDescriptorTypes()[XLFormRowDescriptorTypeSegmentedControl] = InlineSegmentedControl.self
         XLFormViewController.inlineRowDescriptorTypesForRowDescriptorTypes()[XLFormRowDescriptorTypeSegmentedInline] = XLFormRowDescriptorTypeSegmentedControl

XLForm/XL/Descriptors/XLFormRowDescriptor.m

@@ -135,6 +135,10 @@ -(XLFormBaseCell *)cellForFormController:(XLFormViewController * __unused)formCo
             } else {
                 bundle = [NSBundle bundleForClass:NSClassFromString(cellClass)];
                 cellResource = cellClassString;
+                if ([cellClassString rangeOfString:@"."].location != NSNotFound) {
+                    NSArray *components = [cellClassString componentsSeparatedByString:@"."];
+                    cellResource = [components lastObject];
+                }
             }
             NSParameterAssert(bundle != nil);
             NSParameterAssert(cellResource != nil);