- add pageControl position property

Author: interchen

Examples/ImagePlayerViewDemo/ImagePlayerViewDemo/ICViewController.m

@@ -26,6 +26,7 @@ - (void)viewDidLoad
 
     [self.imagePlayerView initWithImageURLs:imageURLs placeholder:nil delegate:self];
     self.imagePlayerView.scrollInterval = 5.0f;
+    self.imagePlayerView.pageControlPosition = ICPageControlPosition_BottomRight;
 }
 
 - (void)didReceiveMemoryWarning

ImagePlayerView/ImagePlayerView.h

@@ -8,12 +8,22 @@
 
 #import <UIKit/UIKit.h>
 
+typedef NS_ENUM(NSInteger, ICPageControlPosition) {
+    ICPageControlPosition_TopLeft,
+    ICPageControlPosition_TopCenter,
+    ICPageControlPosition_TopRight,
+    ICPageControlPosition_BottomLeft,
+    ICPageControlPosition_BottomCenter,
+    ICPageControlPosition_BottomRight
+};
+
 @protocol ImagePlayerViewDelegate;
 
 @interface ImagePlayerView : UIView
 @property (nonatomic, assign) id<ImagePlayerViewDelegate> imagePlayerViewDelegate;
 @property (nonatomic, assign) BOOL autoScroll;  // Default is YES, set NO to turn off autoScroll
 @property (nonatomic, assign) NSUInteger scrollInterval;    // scroll interval, unit: second, Default is 2 seconds
+@property (nonatomic, assign) ICPageControlPosition pageControlPosition;
 
 /**
  *  Init image player

ImagePlayerView/ImagePlayerView.m

@@ -17,6 +17,7 @@ @interface ImagePlayerView() <UIScrollViewDelegate>
 @property (nonatomic, strong) NSArray *imageURLs;
 @property (nonatomic, strong) NSTimer *autoScrollTimer;
 @property (nonatomic, strong) UIPageControl *pageControl;
+@property (nonatomic, strong) NSMutableArray *pageControlConstraints;
 @end
 
 @implementation ImagePlayerView
@@ -72,14 +73,20 @@ - (void)_init
     self.pageControl.currentPage = 0;
     [self addSubview:self.pageControl];
 
-    [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[pageControl]-0-|"
-                                                                 options:kNilOptions
-                                                                 metrics:nil
-                                                                   views:@{@"pageControl": self.pageControl}]];
-    [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[pageControl]-|"
-                                                                 options:kNilOptions
-                                                                 metrics:nil
-                                                                   views:@{@"pageControl": self.pageControl}]];
+    NSArray *pageControlVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[pageControl]-0-|"
+                                                                               options:kNilOptions
+                                                                               metrics:nil
+                                                                                 views:@{@"pageControl": self.pageControl}];
+    
+    NSArray *pageControlHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[pageControl]-|"
+                                                                               options:kNilOptions
+                                                                               metrics:nil
+                                                                                 views:@{@"pageControl": self.pageControl}];
+    
+    self.pageControlConstraints = [NSMutableArray arrayWithArray:pageControlVConstraints];
+    [self.pageControlConstraints addObjectsFromArray:pageControlHConstraints];
+    
+    [self addConstraints:self.pageControlConstraints];
 
 }
 
@@ -256,5 +263,70 @@ - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
     self.pageControl.currentPage = currentIndex;
 }
 
+#pragma mark -
+- (void)setPageControlPosition:(ICPageControlPosition)pageControlPosition
+{
+    NSString *vFormat = nil;
+    NSString *hFormat = nil;
+    
+    switch (pageControlPosition) {
+        case ICPageControlPosition_TopLeft: {
+            vFormat = @"V:|-0-[pageControl]";
+            hFormat = @"H:|-[pageControl]";
+            break;
+        }
+            
+        case ICPageControlPosition_TopCenter: {
+            vFormat = @"V:|-0-[pageControl]";
+            hFormat = @"H:|[pageControl]|";
+            break;
+        }
+            
+        case ICPageControlPosition_TopRight: {
+            vFormat = @"V:|-0-[pageControl]";
+            hFormat = @"H:[pageControl]-|";
+            break;
+        }
+            
+        case ICPageControlPosition_BottomLeft: {
+            vFormat = @"V:[pageControl]-0-|";
+            hFormat = @"H:|-[pageControl]";
+            break;
+        }
+            
+        case ICPageControlPosition_BottomCenter: {
+            vFormat = @"V:[pageControl]-0-|";
+            hFormat = @"H:|[pageControl]|";
+            break;
+        }
+            
+        case ICPageControlPosition_BottomRight: {
+            vFormat = @"V:[pageControl]-0-|";
+            hFormat = @"H:[pageControl]-|";
+            break;
+        }
+            
+        default:
+            break;
+    }
+    
+    [self removeConstraints:self.pageControlConstraints];
+    
+    NSArray *pageControlVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:vFormat
+                                                                               options:kNilOptions
+                                                                               metrics:nil
+                                                                                 views:@{@"pageControl": self.pageControl}];
+    
+    NSArray *pageControlHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:hFormat
+                                                                               options:kNilOptions
+                                                                               metrics:nil
+                                                                                 views:@{@"pageControl": self.pageControl}];
+    
+    [self.pageControlConstraints removeAllObjects];
+    [self.pageControlConstraints addObjectsFromArray:pageControlVConstraints];
+    [self.pageControlConstraints addObjectsFromArray:pageControlHConstraints];
+    
+    [self addConstraints:self.pageControlConstraints];
+}
 @end