//添加子視圖控制器

- (void) setupChildViewControllers

{

NSArray * vcNames = @[@"PersonageFinancialViewController",@"EnterpriseFinancialViewController"];

for (NSInteger i = 0; i < vcNames.count; i ++) {

NSString * vcName = vcNames[i];

UIViewController * vc = [[NSClassFromString(vcName) alloc] init];

//當(dāng)執(zhí)行這句話，不會(huì)執(zhí)行vc的viewDidLoad

[self addChildViewController:vc];

}

//進(jìn)入子控制器加載第一個(gè)頁(yè)面

[self scrollViewDidEndDecelerating:self.scrollView];

}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {

CGFloat width = SCREEN_WIDTH;

CGFloat heitht = SCREEN_HEIGHT;

CGFloat offset = scrollView.contentOffset.x;

//獲取索引值

NSInteger idx = scrollView.contentOffset.x / width;

//根據(jù)索引值返回vc引用

UIViewController * vc = self.childViewControllers[idx];

//判斷當(dāng)前vc是否執(zhí)行過(guò)viewDidLoad

if ([vc isViewLoaded]) return;

//設(shè)置子控制器view的大小

vc.view.frame = CGRectMake(offset, 0, width, heitht);

//將子控制器的view加入scrollview上

[scrollView addSubview:vc.view];

}