/** 滾動視圖 */
@property (nonatomic,strong)UIScrollView *scrollView;
_scrollView = [[UIScrollView alloc]initWithFrame:(CGRectMake(scrollViewX, scrollViewY, scrollViewW, scrollViewH))];
 [self.view addSubview:_scrollView];
_scrollView.contentSize = CGSizeMake(4*scrollViewW, 0);

/** 添加子視圖 */
for (NSInteger i=0; i<4; i++) {
  UIView *view = [[UIView alloc]initWithFrame:(CGRectMake(viewX, viewY, viewW, viewH))];
  [_scrollView addSubview:view];
}

我在UIScrollView中添加了四個UIView,怎么它的subviews缺增加了兩個UIImageView,我明明沒有增加,怎么系統(tǒng)卻給我增加,弄不清楚兩個UIImageView是什么.打印下滾動視圖的子視圖,如下:

滾動視圖的子視圖(
  "<UIView: 0x7fb0e8cab180; frame = (0 0; 414 184); layer = <CALayer: 0x7fb0eb01a110>>",
  "<UIView: 0x7fb0e8ca7a70; frame = (414 0; 414 184); layer = <CALayer: 0x7fb0e8c23ad0>>",
  "<UIView: 0x7fb0e8c11390; frame = (828 0; 414 184); layer = <CALayer: 0x7fb0e8c11500>>",
  "<UIView: 0x7fb0e8ca6240; frame = (1242 0; 414 184); layer = <CALayer: 0x7fb0e8ca63b0>>",
  "<UIImageView: 0x7fb0eb03dc20; frame = (3 114.667; 408 2.33333); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x7fb0e8ca0330>>",
  "<UIImageView: 0x7fb0eb03e780; frame = (408.667 110; 2.33333 7); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x7fb0e8c078e0>>"
)

后來才知道原來他們是兩個滾動條,那怎么才刪除滾動條?

_scrollView.showsHorizontalScrollIndicator = NO;
_scrollView.showsVerticalScrollIndicator = NO;

如果還是想要滾動條的話,只能用一個數(shù)組存放四個UIView

/** 子視圖數(shù)據(jù) */
@property (nonatomic,strong)NSMutableArray *views;

/** 添加子視圖 */
for (NSInteger i=0; i<4; i++) {
  UIView *view = [[UIView alloc]initWithFrame:(CGRectMake(viewX, viewY, viewW, viewH))];
  [_scrollView addSubview:view];
  [sel.views addObject:view];
}

- (NSMutableArray *) views {
    if(!_views) {
        _views = [[NSMutableArray alloc] init];
    }
    return _views;
}

代碼下載地址:https://github.com/y77087758/Scrollview-subViewNum