设置scrollView内容的尺寸(滚动的范围)

      self.scrollView.contentSize = CGSizeMake(, );

      self.scrollView.contentSize = self.minionView.image.size;

      self.scrollView.contentSize = self.minionView.frame.size; // 总体内容的范围(滚动范围)

    // <#CGFloat top#>, <#CGFloat left#>, <#CGFloat bottom#>, <#CGFloat right#>

    //外边距(用于穿透效果等)

    self.scrollView.contentInset = UIEdgeInsetsMake(, , , );

- (IBAction)scroll {

      [UIView animateWithDuration:1.0 animations:^{

          self.scrollView.contentOffset = CGPointMake(, );

      }];

//    CGPoint offset = CGPointMake(-100, -100);

    CGPoint offset = self.scrollView.contentOffset;

    offset.x += ;

    offset.y += ;

    [self.scrollView setContentOffset:offset animated:YES];

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    // 设置内容尺寸

//    CGFloat contentH = self.lastBtn.frame.origin.y + self.lastBtn.frame.size.height+ 10;

    // 10是底部的间距

    CGFloat contentH = CGRectGetMaxY(self.lastBtn.frame) + ;

    self.scrollView.contentSize = CGSizeMake(, contentH);

    // 增加额外的滚动区域(在顶部增加64的区域,在底部增加44的区域)

    self.scrollView.contentInset = UIEdgeInsetsMake(, , , );

    // 设置一开始的滚动位置(往下滚动64)

    self.scrollView.contentOffset = CGPointMake(, -);

}