我有一个如下所示的视图:
红色矩形(引用outlet:self.redView)放在scrollview(引用outlet:self.scrollView)中。当"更大"或者"较小的"按下按钮,红色矩形扩展/收缩其高度。
我的代码在这里:
#import "s1cViewController.h"
@interface s1cViewController ()
@end
@implementation s1cViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidLayoutSubviews {
[self.scrollView setScrollEnabled:YES];
[self.scrollView setContentSize:CGSizeMake(self.scrollView.frame.size.width, 600)];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)btnBiggerTouched:(id)sender {
[self resizeViewHeight:20];
}
- (IBAction)btnSmallerTouched:(id)sender {
[self resizeViewHeight:-20];
}
- (void)resizeViewHeight:(int)heightDelta {
[UIView animateWithDuration:0.2f animations:^{
// Resize scrollview height
/*self.scrollView.contentSize = CGSizeMake(self.scrollView.contentSize.width, self.scrollView.contentSize.height + deltaInputWrapperHeight);*/
// Resize categoryInputView height
CGRect rect = self.redView.frame;
rect.size.height += heightDelta;
self.redView.frame = rect;
}];
}
@end
当我更改矩形的高度,然后滚动时,高度会变回原始大小。我该如何防止这种情况?
答案 0 :(得分:2)
也许您正在使用自动布局。如果是这样,那就是问题所在。你无法直接在自动布局下更改视图的框架,因为如果你这样做,当布局出现时,它会立即改变它(就像这里似乎发生的那样)。你必须改变约束。