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scrollview 例子2
代码:
#import "RootViewController.h"@implementation RootViewController@synthesize scrollView;- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view. int pageCount = 3; scrollView = [[UIScrollView alloc]initWithFrame:[[UIScreen mainScreen] applicationFrame]]; [self.view addSubview:scrollView]; scrollView.backgroundColor = [UIColor redColor]; scrollView.scrollEnabled = NO; scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * pageCount, scrollView.frame.size.height); scrollView.pagingEnabled = YES; scrollView.showsHorizontalScrollIndicator = YES; scrollView.delegate = self; CGRect rect = [[UIScreen mainScreen]bounds]; NSArray *colors = [NSArray arrayWithObjects:[UIColor yellowColor], [UIColor blueColor], [UIColor purpleColor], nil]; for (int i = 0; i < pageCount; i++) { CGRect aRect = CGRectMake(rect.origin.x + (i * rect.size.width), rect.origin.y, rect.size.width, rect.size.height); UIView *view1 = [[UIView alloc]initWithFrame:aRect]; view1.backgroundColor = colors[i]; [scrollView addSubview:view1]; } [self moveToPage:3];}- (void) moveToPage:(int)index{ index--; CGRect rect = [[UIScreen mainScreen]bounds]; CGPoint point = CGPointMake(rect.size.width * index, 0); [scrollView setContentOffset:point];}- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ // 拖拽完毕以后调用 int index = [self getPageIndex:scrollView]; NSLog(@"index = %d",index);}-(int) getPageIndex:(UIScrollView *)scrollView{ return fabs(scrollView.contentOffset.x) / scrollView.frame.size.width;}@end
scrollview 例子2
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