设置了内容大小的UIScrollView无法滚动超出帧边界

Question

我觉得我在这里丢失了超级明显的东西。

我有一个故事板的UIScrollView，带有视图控制器的插座。

我以编程方式添加一系列视图，并设置滚动视图的内容大小。

尽管我已经将scrollview的内容高度设置为非常高的值，但我无法滚动到视图边界之外。

设置后正在打印内容大小和帧大小。以及scrollview滚动时的contentoffset.y。

这里是控制台输出的一个例子：

2013-09-24 21:54:34.531 [Redacted] scrollView frame size: 320.000000,460.000000 
2013-09-24 21:54:34.531 [Redacted] scrollView content size: 0.000000,10000.000000 
2013-09-24 21:54:36.259 [Redacted] scroll to: 6.000000 
2013-09-24 21:54:36.275 [Redacted] scroll to: 17.000000 
2013-09-24 21:54:36.291 [Redacted] scroll to: 29.000000 
2013-09-24 21:54:36.308 [Redacted] scroll to: 41.000000 
2013-09-24 21:54:36.325 [Redacted] scroll to: 52.000000 
2013-09-24 21:54:36.341 [Redacted] scroll to: 65.000000 
2013-09-24 21:54:36.358 [Redacted] scroll to: 74.000000 
2013-09-24 21:54:36.375 [Redacted] scroll to: 84.000000 
2013-09-24 21:54:36.392 [Redacted] scroll to: 90.000000 
2013-09-24 21:54:36.408 [Redacted] scroll to: 95.000000 
2013-09-24 21:54:36.425 [Redacted] scroll to: 100.000000 
2013-09-24 21:54:36.441 [Redacted] scroll to: 103.000000 
2013-09-24 21:54:36.459 [Redacted] scroll to: 107.000000 
2013-09-24 21:54:36.475 [Redacted] scroll to: 110.000000 
2013-09-24 21:54:36.492 [Redacted] scroll to: 114.000000 
2013-09-24 21:54:36.509 [Redacted] scroll to: 118.000000 
2013-09-24 21:54:36.525 [Redacted] scroll to: 122.000000 
2013-09-24 21:54:36.542 [Redacted] scroll to: 126.000000 
2013-09-24 21:54:36.558 [Redacted] scroll to: 130.000000 
2013-09-24 21:54:36.575 [Redacted] scroll to: 134.000000 
2013-09-24 21:54:36.592 [Redacted] scroll to: 141.000000 
2013-09-24 21:54:36.609 [Redacted] scroll to: 147.000000 
2013-09-24 21:54:36.625 [Redacted] scroll to: 152.000000 
2013-09-24 21:54:36.642 [Redacted] scroll to: 156.000000 
2013-09-24 21:54:36.659 [Redacted] scroll to: 159.000000 
2013-09-24 21:54:36.676 [Redacted] scroll to: 160.000000 
2013-09-24 21:54:36.776 [Redacted] scroll to: 161.000000 
2013-09-24 21:54:37.010 [Redacted] scroll to: 162.000000 
2013-09-24 21:54:37.026 [Redacted] scroll to: 168.000000 
2013-09-24 21:54:37.043 [Redacted] scroll to: 179.000000 
2013-09-24 21:54:37.060 [Redacted] scroll to: 195.000000 
2013-09-24 21:54:37.077 [Redacted] scroll to: 207.000000 
2013-09-24 21:54:37.097 [Redacted] scroll to: 209.000000 
2013-09-24 21:54:37.112 [Redacted] scroll to: 219.000000 
2013-09-24 21:54:37.129 [Redacted] scroll to: 223.000000 
2013-09-24 21:54:37.145 [Redacted] scroll to: 222.000000 
2013-09-24 21:54:37.162 [Redacted] scroll to: 218.000000 
2013-09-24 21:54:37.179 [Redacted] scroll to: 212.000000 
2013-09-24 21:54:37.195 [Redacted] scroll to: 204.000000 
2013-09-24 21:54:37.212 [Redacted] scroll to: 195.000000 
2013-09-24 21:54:37.229 [Redacted] scroll to: 186.000000 
2013-09-24 21:54:37.245 [Redacted] scroll to: 177.000000 
2013-09-24 21:54:37.262 [Redacted] scroll to: 168.000000 
2013-09-24 21:54:37.279 [Redacted] scroll to: 160.000000 
2013-09-24 21:54:37.296 [Redacted] scroll to: 152.000000 
2013-09-24 21:54:37.312 [Redacted] scroll to: 145.000000 
2013-09-24 21:54:37.329 [Redacted] scroll to: 138.000000 
2013-09-24 21:54:37.346 [Redacted] scroll to: 133.000000 
2013-09-24 21:54:37.362 [Redacted] scroll to: 127.000000 
2013-09-24 21:54:37.379 [Redacted] scroll to: 122.000000 
2013-09-24 21:54:37.396 [Redacted] scroll to: 118.000000 
2013-09-24 21:54:37.412 [Redacted] scroll to: 114.000000 
2013-09-24 21:54:37.429 [Redacted] scroll to: 111.000000 
2013-09-24 21:54:37.445 [Redacted] scroll to: 108.000000 
2013-09-24 21:54:37.462 [Redacted] scroll to: 105.000000 
2013-09-24 21:54:37.479 [Redacted] scroll to: 103.000000 
2013-09-24 21:54:37.496 [Redacted] scroll to: 101.000000 
2013-09-24 21:54:37.512 [Redacted] scroll to: 99.000000 
2013-09-24 21:54:37.529 [Redacted] scroll to: 98.000000 
2013-09-24 21:54:37.545 [Redacted] scroll to: 96.000000 
2013-09-24 21:54:37.562 [Redacted] scroll to: 95.000000 
2013-09-24 21:54:37.579 [Redacted] scroll to: 94.000000 
2013-09-24 21:54:37.595 [Redacted] scroll to: 93.000000 
2013-09-24 21:54:37.629 [Redacted] scroll to: 92.000000 
2013-09-24 21:54:37.645 [Redacted] scroll to: 91.000000 
2013-09-24 21:54:37.695 [Redacted] scroll to: 90.000000 
2013-09-24 21:54:37.745 [Redacted] scroll to: 89.000000 
2013-09-24 21:54:37.862 [Redacted] scroll to: 88.000000 
2013-09-24 21:54:38.381 [Redacted] scroll to: 89.000000 
2013-09-24 21:54:38.397 [Redacted] scroll to: 108.000000 
2013-09-24 21:54:38.414 [Redacted] scroll to: 127.000000 
2013-09-24 21:54:38.431 [Redacted] scroll to: 150.000000 
2013-09-24 21:54:38.448 [Redacted] scroll to: 164.000000 
2013-09-24 21:54:38.464 [Redacted] scroll to: 182.000000 
2013-09-24 21:54:38.481 [Redacted] scroll to: 195.000000 
2013-09-24 21:54:38.499 [Redacted] scroll to: 213.000000 
2013-09-24 21:54:38.516 [Redacted] scroll to: 222.000000 
2013-09-24 21:54:38.533 [Redacted] scroll to: 224.000000 
2013-09-24 21:54:38.550 [Redacted] scroll to: 222.000000 
2013-09-24 21:54:38.566 [Redacted] scroll to: 217.000000 
2013-09-24 21:54:38.583 [Redacted] scroll to: 209.000000 
2013-09-24 21:54:38.599 [Redacted] scroll to: 201.000000 
2013-09-24 21:54:38.616 [Redacted] scroll to: 192.000000 
2013-09-24 21:54:38.633 [Redacted] scroll to: 183.000000 
2013-09-24 21:54:38.650 [Redacted] scroll to: 174.000000 
2013-09-24 21:54:38.666 [Redacted] scroll to: 166.000000 
2013-09-24 21:54:38.683 [Redacted] scroll to: 157.000000 
2013-09-24 21:54:38.699 [Redacted] scroll to: 150.000000 
2013-09-24 21:54:38.716 [Redacted] scroll to: 143.000000 
2013-09-24 21:54:38.733 [Redacted] scroll to: 137.000000 
2013-09-24 21:54:38.749 [Redacted] scroll to: 131.000000 
2013-09-24 21:54:38.766 [Redacted] scroll to: 126.000000 
2013-09-24 21:54:38.783 [Redacted] scroll to: 121.000000 
2013-09-24 21:54:38.799 [Redacted] scroll to: 117.000000 
2013-09-24 21:54:38.816 [Redacted] scroll to: 113.000000 
2013-09-24 21:54:38.833 [Redacted] scroll to: 110.000000 
2013-09-24 21:54:38.849 [Redacted] scroll to: 107.000000 
2013-09-24 21:54:38.866 [Redacted] scroll to: 105.000000 
2013-09-24 21:54:38.883 [Redacted] scroll to: 102.000000 
2013-09-24 21:54:38.900 [Redacted] scroll to: 100.000000 
2013-09-24 21:54:38.916 [Redacted] scroll to: 99.000000 
2013-09-24 21:54:38.933 [Redacted] scroll to: 97.000000 
2013-09-24 21:54:38.950 [Redacted] scroll to: 96.000000 
2013-09-24 21:54:38.966 [Redacted] scroll to: 95.000000 
2013-09-24 21:54:38.983 [Redacted] scroll to: 94.000000 
2013-09-24 21:54:39.000 [Redacted] scroll to: 93.000000 
2013-09-24 21:54:39.016 [Redacted] scroll to: 92.000000 
2013-09-24 21:54:39.049 [Redacted] scroll to: 91.000000 
2013-09-24 21:54:39.083 [Redacted] scroll to: 90.000000 
2013-09-24 21:54:39.150 [Redacted] scroll to: 89.000000 
2013-09-24 21:54:39.267 [Redacted] scroll to: 88.000000 
2013-09-24 21:54:43.145 [Redacted] scroll to: 91.000000 
2013-09-24 21:54:43.162 [Redacted] scroll to: 97.000000 
2013-09-24 21:54:43.178 [Redacted] scroll to: 103.000000 
2013-09-24 21:54:43.195 [Redacted] scroll to: 109.000000 
2013-09-24 21:54:43.212 [Redacted] scroll to: 115.000000 
2013-09-24 21:54:43.229 [Redacted] scroll to: 120.000000 
2013-09-24 21:54:43.245 [Redacted] scroll to: 124.000000 
2013-09-24 21:54:43.262 [Redacted] scroll to: 127.000000 
2013-09-24 21:54:43.279 [Redacted] scroll to: 130.000000 
2013-09-24 21:54:43.296 [Redacted] scroll to: 131.000000 
2013-09-24 21:54:43.312 [Redacted] scroll to: 133.000000 
2013-09-24 21:54:43.329 [Redacted] scroll to: 135.000000 
2013-09-24 21:54:43.345 [Redacted] scroll to: 136.000000 
2013-09-24 21:54:43.374 [Redacted] scroll to: 137.000000 
2013-09-24 21:54:43.664 [Redacted] scroll to: 138.000000 
2013-09-24 21:54:43.681 [Redacted] scroll to: 139.000000 
2013-09-24 21:54:43.697 [Redacted] scroll to: 143.000000 
2013-09-24 21:54:43.714 [Redacted] scroll to: 149.000000 
2013-09-24 21:54:43.731 [Redacted] scroll to: 155.000000 
2013-09-24 21:54:43.748 [Redacted] scroll to: 161.000000 
2013-09-24 21:54:43.764 [Redacted] scroll to: 166.000000 
2013-09-24 21:54:43.781 [Redacted] scroll to: 169.000000 
2013-09-24 21:54:43.798 [Redacted] scroll to: 172.000000 
2013-09-24 21:54:43.814 [Redacted] scroll to: 174.000000 
2013-09-24 21:54:43.831 [Redacted] scroll to: 177.000000 
2013-09-24 21:54:43.848 [Redacted] scroll to: 178.000000 
2013-09-24 21:54:43.865 [Redacted] scroll to: 180.000000 
2013-09-24 21:54:43.887 [Redacted] scroll to: 181.000000 
2013-09-24 21:54:43.914 [Redacted] scroll to: 183.000000 
2013-09-24 21:54:43.948 [Redacted] scroll to: 184.000000 
2013-09-24 21:54:43.981 [Redacted] scroll to: 186.000000 
2013-09-24 21:54:43.998 [Redacted] scroll to: 187.000000 
2013-09-24 21:54:44.015 [Redacted] scroll to: 188.000000 
2013-09-24 21:54:44.031 [Redacted] scroll to: 189.000000 
2013-09-24 21:54:44.048 [Redacted] scroll to: 190.000000 
2013-09-24 21:54:44.065 [Redacted] scroll to: 191.000000 
2013-09-24 21:54:44.082 [Redacted] scroll to: 192.000000 
2013-09-24 21:54:44.116 [Redacted] scroll to: 194.000000 
2013-09-24 21:54:44.149 [Redacted] scroll to: 195.000000 
2013-09-24 21:54:44.182 [Redacted] scroll to: 196.000000 
2013-09-24 21:54:44.216 [Redacted] scroll to: 197.000000 
2013-09-24 21:54:44.266 [Redacted] scroll to: 198.000000 
2013-09-24 21:54:44.283 [Redacted] scroll to: 199.000000 
2013-09-24 21:54:44.299 [Redacted] scroll to: 200.000000 
2013-09-24 21:54:44.316 [Redacted] scroll to: 202.000000 
2013-09-24 21:54:44.349 [Redacted] scroll to: 203.000000 
2013-09-24 21:54:44.366 [Redacted] scroll to: 204.000000 
2013-09-24 21:54:44.449 [Redacted] scroll to: 205.000000 
2013-09-24 21:54:44.500 [Redacted] scroll to: 206.000000 
2013-09-24 21:54:44.601 [Redacted] scroll to: 207.000000 
2013-09-24 21:54:44.932 [Redacted] scroll to: 189.000000 
2013-09-24 21:54:44.949 [Redacted] scroll to: 174.000000 
2013-09-24 21:54:44.966 [Redacted] scroll to: 161.000000 
2013-09-24 21:54:44.982 [Redacted] scroll to: 151.000000 
2013-09-24 21:54:44.999 [Redacted] scroll to: 141.000000 
2013-09-24 21:54:45.016 [Redacted] scroll to: 133.000000 
2013-09-24 21:54:45.032 [Redacted] scroll to: 126.000000 
2013-09-24 21:54:45.049 [Redacted] scroll to: 121.000000 
2013-09-24 21:54:45.066 [Redacted] scroll to: 116.000000 
2013-09-24 21:54:45.082 [Redacted] scroll to: 112.000000 
2013-09-24 21:54:45.099 [Redacted] scroll to: 108.000000 
2013-09-24 21:54:45.116 [Redacted] scroll to: 105.000000 
2013-09-24 21:54:45.133 [Redacted] scroll to: 102.000000 
2013-09-24 21:54:45.149 [Redacted] scroll to: 100.000000 
2013-09-24 21:54:45.166 [Redacted] scroll to: 98.000000 
2013-09-24 21:54:45.183 [Redacted] scroll to: 97.000000 
2013-09-24 21:54:45.200 [Redacted] scroll to: 96.000000 
2013-09-24 21:54:45.216 [Redacted] scroll to: 94.000000 
2013-09-24 21:54:45.233 [Redacted] scroll to: 93.000000 
2013-09-24 21:54:45.266 [Redacted] scroll to: 92.000000 
2013-09-24 21:54:45.283 [Redacted] scroll to: 91.000000 
2013-09-24 21:54:45.316 [Redacted] scroll to: 90.000000 
2013-09-24 21:54:45.366 [Redacted] scroll to: 89.000000 
2013-09-24 21:54:45.483 [Redacted] scroll to: 88.000000 

正如你所看到的，我不能滚动超过200多。

我对iOS并不陌生，以前曾使用过滚动视图，所以我觉得我必须错过一些非常明显的东西。

任何帮助非常感谢，有一个紧迫的最后期限！

编辑：添加代码：

checkboxes = [[NSMutableArray alloc] init]; 
{ 
    // Just indented scope for tidyness, no functional meaning 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Oil Level Checked" 
                atY:190]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Coolant Level Checked" 
                 atY:240]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Tyre pressures & tread dept checked" 
                 atY:290]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Warning beacon & horn operating" 
                 atY:340]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Lights & indicators working & clean" 
                 atY:390]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Screen was & wipers operational" 
                 atY:440]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Mirrors undamaged & clean" 
                 atY:490]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Road Tax & MOD discs present & valid" 
                 atY:540]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"PPE in vechile" 
                 atY:590]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Fire Extinguisher & First Aid kit present" 
                 atY:640]]; 
    [checkboxes addObject:[self createCheckboxWithLabel:@"Wheel nuts checked with torque wrench" 
                 atY:690]]; 
} 
for(WpCheckboxWithLabelView *checkbox in checkboxes){ 
    [scrollView addSubview: checkbox]; 
} 

// Set content size of scrollview 
scrollView.contentSize = CGSizeMake(0, 10000); 
scrollView.delegate = self; 
NSLog(@"scrollView frame size: %f,%f", scrollView.frame.size.width, scrollView.frame.size.height); 
NSLog(@"scrollView content size: %f,%f", scrollView.contentSize.width, scrollView.contentSize.height); 

Answer 1

自动布局是此问题的原因。我并不完全确定详情，但当与自动布局配对时，UIScrollView的Apple's documentation describes the behavioural differences即可。

我相信我的问题是由于在故事板中定义的滚动视图和以编程方式添加的子视图。为了解决这个问题，我以编程的方式创建了UIScrollView。

Answer 2

我有一个我的观点同样的事情，对我来说工作正常。我连接的代码：

CGSize s = CGSizeMake(mainDetailView.frame.size.width, 
         view1.frame.size.height + MARGIN + 
         view2.frame.size.height + MARGIN + 
         view3.frame.size.height + MARGIN + 
         view4.frame.size.height + MARGIN + 10000); 

[mainDetailView setContentSize:s]; 

mainDetailView.clipsToBounds = NO; 
mainDetailView.pagingEnabled = NO; 

余量是一个常数，我定义为20.

我可以滚动超出的观点限制。

也许你可以发布你的代码，并且会更容易帮助你。