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Added a switch for lazy loading pages #4

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Added a switch for lazy loading pages #4

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6b33643
Added a switch for lazy loading
arvindhsukumar Aug 27, 2016
7c598d9
Added a switch for lazy loading
arvindhsukumar Aug 27, 2016
3c5dc77
Merge branch 'master' of https://github.com/arvindhsukumar/MXPagerView
arvindhsukumar Nov 12, 2017
fa84539
Fixed merge issue
arvindhsukumar Nov 12, 2017
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91 changes: 91 additions & 0 deletions ...wift.xcodeproj/xcuserdata/arvindhsukumar.xcuserdatad/xcschemes/MXPagerView-Swift.xcscheme
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Original file line number Diff line number Diff line change
@@ -0,0 +1,91 @@
<?xml version="1.0" encoding="UTF-8"?>
<Scheme
LastUpgradeVersion = "0730"
version = "1.3">
<BuildAction
parallelizeBuildables = "YES"
buildImplicitDependencies = "YES">
<BuildActionEntries>
<BuildActionEntry
buildForTesting = "YES"
buildForRunning = "YES"
buildForProfiling = "YES"
buildForArchiving = "YES"
buildForAnalyzing = "YES">
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "D03882F31BF0C704000F6400"
BuildableName = "MXPagerView-Swift.app"
BlueprintName = "MXPagerView-Swift"
ReferencedContainer = "container:MXPagerView-Swift.xcodeproj">
</BuildableReference>
</BuildActionEntry>
</BuildActionEntries>
</BuildAction>
<TestAction
buildConfiguration = "Debug"
selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
shouldUseLaunchSchemeArgsEnv = "YES">
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<MacroExpansion>
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "D03882F31BF0C704000F6400"
BuildableName = "MXPagerView-Swift.app"
BlueprintName = "MXPagerView-Swift"
ReferencedContainer = "container:MXPagerView-Swift.xcodeproj">
</BuildableReference>
</MacroExpansion>
<AdditionalOptions>
</AdditionalOptions>
</TestAction>
<LaunchAction
buildConfiguration = "Debug"
selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
launchStyle = "0"
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BuildableIdentifier = "primary"
BlueprintIdentifier = "D03882F31BF0C704000F6400"
BuildableName = "MXPagerView-Swift.app"
BlueprintName = "MXPagerView-Swift"
ReferencedContainer = "container:MXPagerView-Swift.xcodeproj">
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runnableDebuggingMode = "0">
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BuildableIdentifier = "primary"
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22 changes: 22 additions & 0 deletions ...-Swift.xcodeproj/xcuserdata/arvindhsukumar.xcuserdatad/xcschemes/xcschememanagement.plist
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@@ -0,0 +1,22 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>SchemeUserState</key>
<dict>
<key>MXPagerView-Swift.xcscheme</key>
<dict>
<key>orderHint</key>
<integer>1</integer>
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<key>SuppressBuildableAutocreation</key>
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<true/>
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Binary file added ...ew-Swift.xcworkspace/xcuserdata/arvindhsukumar.xcuserdatad/UserInterfaceState.xcuserstate
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80 changes: 80 additions & 0 deletions ...xcodeproj/xcuserdata/arvindhsukumar.xcuserdatad/xcschemes/Pods-MXPagerView-Swift.xcscheme
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32 changes: 32 additions & 0 deletions ...s/Pods.xcodeproj/xcuserdata/arvindhsukumar.xcuserdatad/xcschemes/xcschememanagement.plist
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6 changes: 6 additions & 0 deletions MXPagerView/MXPagerView.h
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,12 @@ typedef NS_ENUM(NSInteger, MXPagerViewTransitionStyle) {
*/
@property (nonatomic, readonly) CGFloat progress;

/**
Determine if pages should be lazily loaded
*/
@property(assign) BOOL shouldLazyLoad;


/**
Reloads everything from scratch. redisplays pages.
*/
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27 changes: 23 additions & 4 deletions MXPagerView/MXPagerView.m
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Original file line number Diff line number Diff line change
Expand Up @@ -33,9 +33,11 @@ @interface MXPagerView () <UIScrollViewDelegate, UIGestureRecognizerDelegate>

@property (nonatomic, strong) NSMutableDictionary *registration;
@property (nonatomic, strong) NSMutableArray *reuseQueue;

@end

@implementation MXPagerView {

CGFloat _index;
NSInteger _count;

Expand Down Expand Up @@ -114,8 +116,16 @@ - (void)reloadData {

//Updates index and loads the current selected page
if ( (_count = [self.dataSource numberOfPagesInPagerView:self]) > 0) {
_index = MIN(_index, _count - 1);
[self loadPageAtIndex:_index];
if (self.shouldLazyLoad) {
if (_index >= _count)
_index = _count-1;

[self loadPageAtIndex:_index];
}
else {
[self loadAllPages];
}

[self setNeedsLayout];
}
}
Expand Down Expand Up @@ -237,7 +247,7 @@ - (void)didMovePageToIndex:(NSInteger)index {
[self.delegate pagerView:self didMoveToPage:page atIndex:index];
}

//The page did change, now unload hidden pages
//The page did change, now unload hidden pages
[self unLoadHiddenPages];
}

Expand Down Expand Up @@ -271,13 +281,22 @@ - (void)loadPageAtIndex:(NSInteger)index {
loadPage(index);

//In case of slide behavior, its loads the neighbors as well.
if (self.transitionStyle == MXPagerViewTransitionStyleScroll) {
if (self.transitionStyle == MXPagerViewTransitionStyleScroll && self.shouldLazyLoad) {
loadPage(index - 1);
loadPage(index + 1);
}
}

- (void) loadAllPages {
for (int i = 0; i < _count; i++) {
[self loadPageAtIndex:i];
}
}

- (void)unLoadHiddenPages {
if (!self.shouldLazyLoad) {
return;
}

NSMutableArray *toUnLoad = [NSMutableArray array];

Expand Down