設置了內容大小的UIScrollView無法滾動超出幀邊界

Question

我覺得我在這裏丟失了超級明顯的東西。

我有一個故事板的UIScrollView，帶有視圖控制器的插座。

我以編程方式添加一系列視圖，並設置滾動視圖的內容大小。

儘管我已經將scrollview的內容高度設置爲非常高的值，但我無法滾動到視圖邊界之外。

設置後正在打印內容大小和幀大小。以及scrollview滾動時的contentoffset.y。

這裏是控制檯輸出的一個例子：

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，我不能滾動超過200多。

我對iOS並不陌生，以前曾使用過滾動視圖，所以我覺得我必須錯過一些非常明顯的東西。

任何幫助非常感謝，有一個緊迫的最後期限！

編輯：添加代碼：

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

自動佈局是此問題的原因。我並不完全確定詳情，但當與自動佈局配對時，UIScrollView的Apple's documentation describes the behavioural differences即可。

我相信我的問題是由於在故事板中定義的滾動視圖和以編程方式添加的子視圖。爲了解決這個問題，我以編程的方式創建了UIScrollView。

Answer 2

我有一個我的觀點同樣的事情，對我來說工作正常。我連接的代碼：

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; 

餘量是一個常數，我定義爲20.

我可以滾動超出的觀點限制。

也許你可以發佈你的代碼，並且會更容易幫助你。