UIScrollView沒有正確滾動

Question

這是我迄今爲止，我有一個滾動和兩個按鈕，我想在滾動，但我不能得到第二個按鈕，因爲它不會滾動到它。如果有人能看到我的代碼中的錯誤，我將不勝感激。

UIScrollView *mainScroll = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 65, 320, 4000)]; 
mainScroll.contentSize = CGSizeMake(320, 4000); 
mainScroll.showsHorizontalScrollIndicator = YES; 
[self.view addSubview:mainScroll]; 
[mainScroll setScrollEnabled:YES]; 


UIButton *mainCreateGame = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
[mainCreateGame addTarget:self 
        action:@selector(goToCreateGameViewController) 
     forControlEvents:UIControlEventTouchUpInside]; 
[mainScroll addSubview:mainCreateGame]; 
mainCreateGame.frame = CGRectMake(75, 10, 170, 60); 



UIButton *anotherButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
[anotherButton addTarget:self 
        action:@selector(goFuckOffApple) 
     forControlEvents:UIControlEventTouchUpInside]; 
[mainScroll addSubview: anotherButton]; 
anotherButton.frame = CGRectMake(75, 3000, 170, 60); 

Answer 1

那麼，除了令人捧腹的方法名（GOF ** kOffApple，LOL），你是你的滾動視圖的邊框設置爲相同的大小，因爲它的內容。框架和內容大小是不同的動物。試試這個：

UIScrollView *mainScroll = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 65, 320, 395)]; 
mainScroll.contentSize = CGSizeMake(320, 4000); 
mainScroll.showsVerticalScrollIndicator = YES; 
[self.view addSubview:mainScroll]; 
[mainScroll setScrollEnabled:YES]; 


UIButton *mainCreateGame = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
[mainCreateGame addTarget:self 
        action:@selector(goToCreateGameViewController) 
     forControlEvents:UIControlEventTouchUpInside]; 
[mainScroll addSubview:mainCreateGame]; 
mainCreateGame.frame = CGRectMake(75, 10, 170, 60); 



UIButton *anotherButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
[anotherButton addTarget:self 
        action:@selector(goFuckOffApple) 
     forControlEvents:UIControlEventTouchUpInside]; 
[mainScroll addSubview: anotherButton]; 
anotherButton.frame = CGRectMake(75, 3000, 170, 60);