ScrollView 不能在 iPad 上工作，但在 iPhone 上工作

Question

我有一个滚动视图，它是完全关闭的按钮。此滚动视图适用于 iPhone，但不适用于 ipad

#define scrollViewSizeForiPad 1000 
#define scrollViewSizeForiPhone 600 
#define locationButtonSizeForiPhone 50 
#define locationButtonSizeForiPad 30

我添加了这样的按钮

lc_button.frame = CGRectMake(0, 0, buttonSize, buttonSize);
[_uiScrollForLocations addSubview:lc_button];

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还有一些标签

if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad){
    buttonSize = buttonWidthHeightForiPad;
    lc_label.font = [UIFont systemFontOfSize:14];
    lc_label.frame = CGRectMake(3, 100, buttonSize, 20);
} else {
    buttonSize = buttonWidthHeightForiPhone;
    lc_label.font = [UIFont systemFontOfSize:9];
    lc_label.frame = CGRectMake(8, 50, buttonSize, 10);
}
[_uiScrollForLocations addSubview:lc_label];


-(void) showLocations:(NSMutableArray *)lc_array {
[self hideAllLocations];
[self addButtonToView:lc_array whichView:_uiScrollForLocations type:@"Location"];

CGSize pagesScrollViewSize = _uiScrollForLocations.frame.size;
int viewHeight;
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad){
    viewHeight = buttonWidthHeightForiPad;
} else {
    viewHeight = buttonWidthHeightForiPhone;
}
_uiScrollForLocations.contentSize = CGSizeMake(pagesScrollViewSize.width, viewHeight);}

Answer 1

这是因为 contentSize

需要设置

_uiScrollForLocations.alwaysBounceVertical = YES

或

_uiScrollForLocations.alwaysBounceHorizontal = YES