ScrollView+PageControl遇到的那些坑

1.ScrollView以及在ScrollView上面添加的view，一定不能用layout自動布局，樓主一開始使用Masonry自動布局，scrollview隻能顯示第一個view，pagecontroll顯示正常。話不多說，代碼如下：

這是顯示正常的：

- (void)initUI {

    pageNumbers = 2;

    bounds = self.frame;

    view1 = [UIView new];

    [view1 setFrame:CGRectMake(0, 0, bounds.size.width, bounds.size.height)];

    view1.backgroundColor = [UIColor greenColor];

    view2 = [UIView new];

    [view2 setFrame:CGRectMake(bounds.size.width, 0, bounds.size.width, bounds.size.height)];

    view2.backgroundColor = [UIColor yellowColor];

    scrollView = [UIScrollView new];

    [scrollView setFrame:CGRectMake(0, 0, bounds.size.width, bounds.size.height)];

    [self addSubview:scrollView];

    [scrollView addSubview:view1];

    [scrollView addSubview:view2];

    [scrollView setContentSize:CGSizeMake(bounds.size.width * pageNumbers, bounds.size.height)];

    [scrollView setPagingEnabled:YES];

    [scrollView setBounces:NO];

    [scrollView setShowsHorizontalScrollIndicator:NO];

    scrollView.delegate = self;

    pageControl = [UIPageControl new];

    [self addSubview:pageControl];

    [pageControl setFrame:CGRectMake(bounds.size.width/2 - [NSNumber getTransNumberCompareWidth:40], bounds.size.height - [NSNumber getTransNumberCompareWidth:80], [NSNumber getTransNumberCompareWidth:80], [NSNumber getTransNumberCompareWidth:80])];

    [pageControl setNumberOfPages:pageNumbers];

    pageControl.currentPage = 0;

    pageControl.pageIndicatorTintColor = [UIColor lightGrayColor];        //設定未激活的訓示點顔色

    pageControl.currentPageIndicatorTintColor = [UIColor whiteColor];

    [pageControl addTarget:self action:@selector(pageTurn:) forControlEvents:UIControlEventValueChanged];  //使用者點選UIPageControl的響應函數

}

- (void)layoutSubviews{

    [super layoutSubviews];

}

這是不能滑動的：

- (void)initUI {

    pageNumbers = 2;

    bounds = self.frame;

    view1 = [UIView new];

    view1.backgroundColor = [UIColor greenColor];

    view2 = [UIView new];

    view2.backgroundColor = [UIColor yellowColor];

    scrollView = [UIScrollView new];

    [self addSubview:scrollView];

    [scrollView addSubview:view1];

    [scrollView addSubview:view2];

    [scrollView setContentSize:CGSizeMake(bounds.size.width * pageNumbers, bounds.size.height)];

    [scrollView setPagingEnabled:YES];

    [scrollView setBounces:NO];

    [scrollView setShowsHorizontalScrollIndicator:NO];

    scrollView.delegate = self;

    pageControl = [UIPageControl new];

    [self addSubview:pageControl];

    [pageControl setNumberOfPages:pageNumbers];

    pageControl.currentPage = 0;

    pageControl.pageIndicatorTintColor = [UIColor lightGrayColor];        //設定未激活的訓示點顔色

    pageControl.currentPageIndicatorTintColor = [UIColor whiteColor];

    [pageControl addTarget:self action:@selector(pageTurn:) forControlEvents:UIControlEventValueChanged];  //使用者點選UIPageControl的響應函數

}

- (void)layoutSubviews{

    [super layoutSubviews];

    //scrollView布局

    [scrollView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake(bounds.size.width, bounds.size.height));

        make.top.mas_equalTo(self.mas_top);

        make.left.mas_equalTo(self.mas_left);

    }];

    //view1布局

    [view1 mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake(bounds.size.width, bounds.size.height));

        make.top.mas_equalTo(self.mas_top);

        make.left.mas_equalTo(self.mas_left);

    }];

    //view2布局

    [view2 mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake(bounds.size.width, bounds.size.height));

        make.top.mas_equalTo(self.mas_top);

        make.left.mas_equalTo(self.mas_right);

    }];

    //pagecontrol布局

    [pageControl mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake([NSNumber getTransNumberCompareWidth:80], [NSNumber getTransNumberCompareWidth:80]));

        make.bottom.mas_equalTo(self.mas_bottom);

        make.centerX.mas_equalTo(self.mas_centerX);

    }];

}

- (void)layoutSubviews{

    [super layoutSubviews];

    //scrollView布局

    [scrollView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake(bounds.size.width, bounds.size.height));

        make.top.mas_equalTo(self.mas_top);

        make.left.mas_equalTo(self.mas_left);

    }];

    //view1布局

    [view1 mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake(bounds.size.width, bounds.size.height));

        make.top.mas_equalTo(self.mas_top);

        make.left.mas_equalTo(self.mas_left);

    }];

    //view2布局

    [view2 mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake(bounds.size.width, bounds.size.height));

        make.top.mas_equalTo(self.mas_top);

        make.left.mas_equalTo(self.mas_right);

    }];

    //pagecontrol布局

    [pageControl mas_makeConstraints:^(MASConstraintMaker *make) {

        make.size.mas_equalTo(CGSizeMake([NSNumber getTransNumberCompareWidth:80], [NSNumber getTransNumberCompareWidth:80]));

        make.bottom.mas_equalTo(self.mas_bottom);

        make.centerX.mas_equalTo(self.mas_centerX);

    }];

}