Added check to ask for permission for a row to be moved

Author: Florian Mielke

FMFramework/FMMoveTableView.h

@@ -7,6 +7,9 @@
 //  
 
 
+#import <QuartzCore/QuartzCore.h>
+
+
 @class FMMoveTableView;
 
 
@@ -29,6 +32,11 @@
 // Called after the particular row is being dropped to it's new index path
 - (void)moveTableView:(FMMoveTableView *)tableView moveRowFromIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath;
 
+@optional
+
+// Allows to reorder a particular row
+- (BOOL)moveTableView:(FMMoveTableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath;
+
 @end
 
 

FMFramework/FMMoveTableView.m

@@ -119,6 +119,7 @@ @implementation FMMoveTableView
 - (void)setup
 {
 	UILongPressGestureRecognizer *movingGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
+	[movingGestureRecognizer setDelegate:self];
 	[self addGestureRecognizer:movingGestureRecognizer];
 	[self setMovingGestureRecognizer:movingGestureRecognizer];
 }
@@ -210,6 +211,27 @@ - (NSIndexPath *)adaptedIndexPathForRowAtIndexPath:(NSIndexPath *)indexPath
 #pragma mark -
 #pragma mark Handle long press
 
+- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
+{
+	BOOL shouldBegin = YES;
+	
+	if ([gestureRecognizer isEqual:[self movingGestureRecognizer]])
+	{
+		// Ask the data source if we are allowed to move the touched row
+		if ([[self dataSource] respondsToSelector:@selector(moveTableView:canMoveRowAtIndexPath:)]) 
+		{
+			// Grap the touched index path
+			CGPoint touchPoint = [gestureRecognizer locationInView:self];
+			NSIndexPath *touchedIndexPath = [self indexPathForRowAtPoint:touchPoint];
+			
+			shouldBegin = [[self dataSource] moveTableView:self canMoveRowAtIndexPath:touchedIndexPath];
+		}
+	}
+	
+	return shouldBegin;
+}
+
+
 - (void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
 {
 	switch ([gestureRecognizer state]) 

FMMoveTable/Classes/FMViewController.m

@@ -113,6 +113,12 @@ - (UITableViewCell *)tableView:(FMMoveTableView *)tableView cellForRowAtIndexPat
 }
 
 
+- (BOOL)moveTableView:(FMMoveTableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
+{
+	return YES;
+}
+
+
 - (void)moveTableView:(FMMoveTableView *)tableView moveRowFromIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
 {
 	NSArray *movie = [[[self movies] objectAtIndex:[fromIndexPath section]] objectAtIndex:[fromIndexPath row]];