ios-新浪微博开发-14（新特性2）

#import "QHNewfeatureViewController.h"

#define QHNewfeatureCount 4

@interface QHNewfeatureViewController ()<UIScrollViewDelegate>

@property(nonatomic,weak)UIPageControl *pageControl;
@end

@implementation QHNewfeatureViewController

- (void)viewDidLoad {
[super viewDidLoad];

//1.创建一个scrollView
UIScrollView *scrollView = [[UIScrollView alloc]init];

scrollView.frame = self.view.bounds;
scrollView.delegate = self;
[self.view addSubview:scrollView];

CGFloat scrollW = scrollView.width;
CGFloat scrollH = scrollView.height;
//2.添加图片到scrollView
for (int i = 0; i < QHNewfeatureCount; i++) {
UIImageView *imageView = [[UIImageView alloc]init];
imageView.width = scrollW;
imageView.height = scrollH;
imageView.y = 0;
imageView.x = i *imageView.width;
//显示图片
NSString *name = [NSString stringWithFormat:@"new_feature_%d",i+1];
imageView.image = [UIImage imageNamed:name];
[scrollView addSubview:imageView];

//如果是最后一个imageView 就往里面添加内容
if(i == QHNewfeatureCount - 1)
{
[self setupLastImageView:imageView];
}
}

#warning 默认情况下 scrollView 一创建出来 它里面就可能存在一些控件了
#warning  就算不主动添加一些控件到scrollView中 内部还还是可能会有一些控件

//3.设置scrollView的其他属性
//如果想要某个方向不能滚动 那么那个方向对应的储存数值传0
scrollView.contentSize = CGSizeMake(QHNewfeatureCount *scrollView.width, 0);

//取出弹簧效果
scrollView.bounces = NO;
scrollView.pagingEnabled = YES;
scrollView.showsHorizontalScrollIndicator = NO;

//4.设置pageControll
UIPageControl *pageControl = [[UIPageControl alloc]init];
pageControl.numberOfPages = QHNewfeatureCount;

//@property(nonatomic,retain) UIColor *pageIndicatorTintColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
//@property(nonatomic,retain) UIColor *currentPageIndicatorTintColor
pageControl.currentPageIndicatorTintColor =[UIColor colorWithRed:0.98f green:0.38f blue:0.11f alpha:1.00f];
pageControl.pageIndicatorTintColor =[UIColor colorWithRed:0.74f green:0.74f blue:0.74f alpha:1.00f];

pageControl.centerX = scrollView.width *0.5;
pageControl.centerY = scrollView.height - 50;
[self.view addSubview:pageControl];

self.pageControl = pageControl;
//    不用设置尺寸也可以显示
//    pageControl.width = 100;
//    pageControl.height = 50;
//    pageControl.userInteractionEnabled = NO;

/**
*[UIColor colorWithRed:0.98f green:0.38f blue:0.11f alpha:1.00f];橙色
*[UIColor colorWithRed:0.74f green:0.74f blue:0.74f alpha:1.00f];灰色
*/
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
//    int page = scrollView.contentOffset.x/scrollView.width;
//    self.pageControl.currentPage = page;
//    QHLog(@"%ld",(long)self.pageControl.currentPage);
double page = scrollView.contentOffset.x/scrollView.width;
self.pageControl.currentPage = (int)(page + 0.5);
}

- (void)setupLastImageView:(UIImageView *)imageView
{
//开启用户交互
imageView.userInteractionEnabled = YES;

//1.分享给大家（check box）
UIButton *shareBtn = [[UIButton alloc]init];
[shareBtn setImage:[UIImage imageNamed:@"new_feature_share_false"] forState:UIControlStateNormal];
[shareBtn setImage:[UIImage imageNamed:@"new_feature_share_true"] forState:UIControlStateSelected];
[shareBtn setTitle:@"分享给大家" forState:UIControlStateNormal];
[shareBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
shareBtn.titleLabel.font = [UIFont systemFontOfSize:15];
shareBtn.width = 100;
shareBtn.height = 30;
shareBtn.centerX = imageView.width *0.5;
shareBtn.centerY = imageView.height *0.6;

[shareBtn addTarget:self action:@selector(shareClick:) forControlEvents:UIControlEventTouchUpInside];
[imageView addSubview:shareBtn];

//EdgeInsets:自切 背景色是一种很好的调试工具
//top left bottom right  会影响按钮里面的所有内容（里面的imageView 和 titleLabel）
//    shareBtn.contentEdgeInsets = UIEdgeInsetsMake(<#CGFloat top#>, <#CGFloat left#>, <#CGFloat bottom#>, <#CGFloat right#>);

//这个只影响titlelabel 的属性
//    shareBtn.titleEdgeInsets = UIEdgeInsetsMake(<#CGFloat top#>, <#CGFloat left#>, <#CGFloat bottom#>, <#CGFloat right#>)
shareBtn.imageEdgeInsets = UIEdgeInsetsMake(0, -20, 0, 0 );
//    shareBtn.titleEdgeInsets 内边距
//    shareBtn.imageEdgeInsets
//    shareBtn.contentEdgeInsets

//2.开始微博
UIButton *startBtn = [[UIButton alloc]init];
[startBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_finish_button"] forState:UIControlStateNormal];
[startBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_finish_button_highlighted"] forState:UIControlStateSelected];

startBtn.size = startBtn.currentBackgroundImage.size;
startBtn.centerX = shareBtn.centerX;
startBtn.centerY = imageView.height *0.75;
[startBtn setTitle:@"开始微博" forState:UIControlStateNormal];
[imageView addSubview:startBtn];

}

- (void)shareClick:(UIButton *)shareBtn
{
//状态取反
shareBtn.selected = !shareBtn.selected;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}