ios中scrollView基本用法

      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(, -);
}