//

//  ViewController.m

//  今日头条

//

//  Created by YouXianMing on 14/11/26.

//  Copyright (c) 2014年 YouXianMing. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()<UIScrollViewDelegate>

@property (nonatomic, strong) UIScrollView  *scrollView;

@property (nonatomic, strong) UIView        *alphaView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    [self.view addSubview:[self theSubView]];

    [self.view addSubview:[self theFrontView]];

    self.scrollView               = [[UIScrollView alloc] initWithFrame:self.view.bounds];

    self.scrollView.delegate      = self;

    self.scrollView.pagingEnabled = YES;

    self.scrollView.contentSize   = CGSizeMake(self.scrollView.bounds.size.width * ,

                                               self.scrollView.bounds.size.height);

    [self.view addSubview:self.scrollView];

}

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

    CGRect rect          = self.alphaView.frame;

    rect.origin.x        = scrollView.contentOffset.x / .f;

    self.alphaView.frame = rect;

}

- (UIView *)theSubView {

    // 添加前景色

    UIView *backView         = [[UIView alloc] initWithFrame:CGRectMake(, , , )];

    backView.backgroundColor = [UIColor colorWithRed:0.922 green:0.922 blue:0.922 alpha:];

    [self.view addSubview:backView];

    // 标题1

    UILabel *title1      = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];

    title1.text          = @"今日头条";

    title1.textAlignment = NSTextAlignmentCenter;

    title1.font          = [UIFont systemFontOfSize:.f];

    title1.textColor     = [UIColor colorWithRed:0.443 green:0.439 blue:0.439 alpha:];

    [backView addSubview:title1];

    // 标题2

    UILabel *title2      = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];

    title2.text          = @"YouXianMing";

    title2.textAlignment = NSTextAlignmentCenter;

    title2.font          = [UIFont systemFontOfSize:.f];

    title2.textColor     = [UIColor colorWithRed:0.443 green:0.439 blue:0.439 alpha:];

    [backView addSubview:title2];

    return backView;

}

- (UIView *)theFrontView {

    // 添加前景色

    UIView *backView         = [[UIView alloc] initWithFrame:CGRectMake(, , , )];

    backView.backgroundColor = [UIColor colorWithRed:0.808 green:0.208 blue:0.212 alpha:];

    [self.view addSubview:backView];

    // 标题1

    UILabel *title1      = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];

    title1.text          = @"今日头条";

    title1.textAlignment = NSTextAlignmentCenter;

    title1.font          = [UIFont systemFontOfSize:.f];

    title1.textColor     = [UIColor colorWithRed:0.945 green:0.827 blue:0.827 alpha:];

    [backView addSubview:title1];

    // 标题2

    UILabel *title2      = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];

    title2.text          = @"YouXianMing";

    title2.textAlignment = NSTextAlignmentCenter;

    title2.font          = [UIFont systemFontOfSize:.f];

    title2.textColor     = [UIColor colorWithRed:0.945 green:0.827 blue:0.827 alpha:];

    [backView addSubview:title2];

    self.alphaView                 = [[UIView alloc] initWithFrame:CGRectMake(, , , )];

    self.alphaView.backgroundColor = [UIColor blackColor];

    self.alphaView.layer.cornerRadius = .f;

    backView.maskView              = self.alphaView;

    return backView;

}

@end