When I animate the custom view, the height of the view changes - ios

Question

My xib of BetRecordAniChooserView :
My ViewController in simulator:
You can see the background view of the chooser-view height is reduce.
My code is below:
BetRecordAniChooserView.h:
#import <UIKit/UIKit.h>
typedef void(^ChooseBlock)(NSString *choosedStr);
#interface BetTRecordAniChooserView : UIView
#property (nonatomic, assign) UIViewController *owener;
#property (nonatomic, assign) BOOL isShow;
#property (nonatomic, copy) ChooseBlock block;
- (void)showSelf;
- (void)hideSelf;
#end
BetRecordAniChooserView.m:
#import "BetTRecordAniChooserView.h"
#interface BetTRecordAniChooserView ()
#property (weak, nonatomic) IBOutlet UIButton *all_button;
#property (weak, nonatomic) IBOutlet UIButton *check_pending_button;
#property (weak, nonatomic) IBOutlet UIButton *deposited_button;
#property (weak, nonatomic) IBOutlet UIButton *have_cancel_button;
#end
#implementation BetTRecordAniChooserView
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
- (void)awakeFromNib {
[super awakeFromNib];
self.frame = CGRectMake(0, 0, self.bounds.size.width, 100);
self.all_button.selected = YES;
}
#pragma mark - actions
- (IBAction)allAction:(UIButton *)sender {
self.block(sender.titleLabel.text);
}
- (IBAction)checkPendingAction:(UIButton *)sender {
self.block(sender.titleLabel.text);
}
- (IBAction)haveDepositeAction:(UIButton *)sender {
self.block(sender.titleLabel.text);
}
- (IBAction)haveCancelAction:(UIButton *)sender {
self.block(sender.titleLabel.text);
}
#pragma mark - methods
- (void)showSelf {
CGRect temp_frame = self.frame;
self.isShow = YES;
[UIView animateWithDuration:0.3 animations:^{
self.frame = CGRectMake(temp_frame.origin.x, temp_frame.origin.y + temp_frame.size.height, temp_frame.size.width, temp_frame.size.height);
}];
}
- (void)hideSelf {
CGRect temp_frame = self.frame;
self.isShow = NO;
[UIView animateWithDuration:0.3 animations:^{
self.frame = CGRectMake(temp_frame.origin.x, temp_frame.origin.y - temp_frame.size.height, temp_frame.size.width, temp_frame.size.height);
} completion:^(BOOL finished) {
}];
}
#end
In my ViewController.m:
#import "ViewController.h"
#import "BetTRecordAniChooserView.h"
#interface ViewController ()
{
BetTRecordAniChooserView *_chooser_view;
}
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_chooser_view = [[NSBundle mainBundle] loadNibNamed:#"BetTRecordAniChooserView" owner:self options:nil].firstObject;
//float width = self.view.bounds.size.width;
//float height = 100.f;
//_chooser_view.frame = CGRectMake(0, -height + 64, width, height);
_chooser_view.owener = self;
[self.view addSubview:_chooser_view];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)actionA:(UIButton *)sender {
if (_chooser_view.isShow) {
[_chooser_view hideSelf];
} else {
[_chooser_view showSelf];
}
}
#end
You can see in the BetRecordAniChooserView's awakeFromnNib method:
The frame height I set 100:
self.frame = CGRectMake(0, 0, self.bounds.size.width, 100);
But when I start my simulator it become 36(the gray color view under the buttons).
(lldb) po self.frame
(origin = (x = 0, y = 0), size = (width = 375, height = 36))

Answer 1

I found the reason:
At first I was use the trailing, leading, bottom, top of the gray back view to its superview, I get this issue.
And then I delete the Bottom Space Constraint, and add the height constraint to it.
Then I do not have the issue again, and I can drag out the height Constraint to the .m file too, convenience to change the height.
But I don't know if there is a method I do not use my set height constraint method, still use the trailing, leading, bottom, top constraints to get the requirement effect.