Advertising Carousel Source

1. Create a container view

Uiscrollview * ScrollView = [[Uiscrollview alloc] init];

[Self.view Addsubview:scrollview];

Scrollview.frame = CGRectMake (0, 0, self.view.frame.size.width, 200);

Scrollview.backgroundcolor = [Uicolor Yellowcolor];

Self.scrollview = ScrollView;

2. Add a content sub-view

for (int i = 0; i < 5; i++)

{

Uiimageview * Pictimageview = [[Uiimageview alloc] init];

[ScrollView Addsubview:pictimageview];

NSString * name = [NSString stringwithformat:@ "ad_%02d", I];

Pictimageview.image = [UIImage imagenamed:name];

Set frame

CGFloat pictw = scrollView.frame.size.width;

CGFloat picth = scrollView.frame.size.height;

CGFloat pictx = i * pictw;//i * scrollView.frame.size.width

CGFloat picty = 0;

Pictimageview.frame = CGRectMake (Pictx, Picty, PICTW, PICTH);

}//end for

Set Contentsize to scroll horizontally only

Scrollview.contentsize = Cgsizemake (5 * scrollView.frame.size.width, 0);

Scrollview.showshorizontalscrollindicator = NO;

Whether to support paging feature

scrollview.pagingenabled = YES;

indicator that prompts the user for a specific page hint that is currently displayed

Uipagecontrol * Pagecontroller = [[Uipagecontrol alloc] init];

[Self.view Addsubview:pagecontroller];

Pagecontroller.frame = CGRectMake (0, N. scrollView.frame.size.width, 20);

Pagecontroller.backgroundcolor = [Uicolor Redcolor];

Set how many hint views (small dots) are in total

Pagecontroller.numberofpages = 5;

The dot color of the current indicator page

Pagecontroller.currentpageindicatortintcolor = [Uicolor Greencolor];

Other small dot Color

Pagecontroller.pageindicatortintcolor = [Uicolor Graycolor];

Current instruction on the first few dots

pagecontroller.currentpage = 0;

-(void) Scrollviewdidscroll: (Uiscrollview *) ScrollView

{

1. Always get current offset

CGFloat OffSetX = scrollview.contentoffset.x;

Calculates the number of pages currently scrolled to

Nsinteger currentpage = (OffSetX + scrollView.frame.size.width * 0.5)/scrollView.frame.size.width;

2. Set Pegecontroler

Self.pageController.currentPage = CurrentPage;

}

To prevent the screen view from flashing when the cumulative effect of the time accumulated by the Nstimer, we cancel the auto-scrolling effect when the human is dragged.

-(void) scrollviewwillbegindragging: (Uiscrollview *) ScrollView

{

Cancels the timer function, once the Invalidate method is called, the timer object is not able to revive again

[Self.timer invalidate];

Clear the Timer object

Self.timer = nil;

}

-(void) scrollviewdidenddragging: (Uiscrollview *) ScrollView willdecelerate: (BOOL) decelerate

{

Restart Timer Object

[Self.timer fire]; It is useless to call this method, and once the call to invalidate is not able to resurrect again, only be able to recreate

[Self createtimer];

}

-(void) Createtimer

{

Nstimer * timer = [Nstimer scheduledtimerwithtimeinterval:2 target:self selector: @selector (AutoScroll) Userinfo:nil Repeats:yes];

Self.timer = timer;

Add Timer object to loop loop, Nsrunloopcommonmodes communication mode

[[Nsrunloop Currentrunloop] Addtimer:timer formode:nsrunloopcommonmodes];

}

-(void) AutoScroll

{

NSLog (@ "start scrolling automatically");

/*

The ScrollView scrolling effect is actually changing the value of the bounds, which is changing the contentoffset direction.

Currently displayed on page *scrollview.width

If it has been shown to the last page, then return to 0

*/

Nsinteger currentpage = Self.pageController.currentPage >= 4? 0:self.pagecontroller.currentpage + 1;

CGFloat OffsetX = currentpage * self.scrollView.frame.size.width;

Self.scrollView.contentOffset = Cgpointmake (OffsetX, 0);

}

Advertising Carousel Source