在UIView（xib）框架之外的UIButton

Question

我有一个自定义UIView XIB加载到我的ViewController，并且框架会在添加到子视图之前进行调整以折叠。绑定到XIB的UIButton在帧小于按钮位置时显示。当框架正在扩展/折叠时，如何隐藏和显示我的UIButton？我的XIB没有使用AutoLayout。

ViewController.m

self.greenView = [[[NSBundle mainBundle] loadNibNamed:@"Green" owner:self options:nil] objectAtIndex:0];
[self.navigationController.view addSubview:self.greenView];

GreenView.h

@interface GreenView : UIView
@property (weak, nonatomic) IBOutlet UIView *expandView;
@property (nonatomic, getter = isExpanded) BOOL expand;
@property (weak, nonatomic) IBOutlet UIButton *testButton;
- (IBAction)testButtonTapped:(id)sender;
@end

GreenView.m

@interface GreenView()
@property (nonatomic) UITapGestureRecognizer *tapGesture;
@end

@implementation GreenView
- (void)awakeFromNib {
    CGRect frame = self.frame;
    frame.size.height = self.expandView.frame.size.height;
    frame.origin.y = 200;
    self.frame = frame;
    self.expand = NO;
    [self.expandView addGestureRecognizer:self.tapGesture];
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (UITapGestureRecognizer *)tapGesture {
    if (!_tapGesture) {
        _tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapClicked:)];
    }
    return _tapGesture;
}

- (void)tapClicked:(UIGestureRecognizer *)recognizer {
    CGRect frame = self.frame;
    self.expand = !self.expand;
    frame.size.height = self.expand ? gvExpandedHeight : gvCollapsedHeight;

    [UIView animateWithDuration:0.5 animations:^{
        self.frame = frame;
    } completion:^(BOOL finished) {
        NSLog(@"Frame after animation: %@", NSStringFromCGRect(self.frame));
    }];
}

- (IBAction)testButtonTapped:(id)sender {
    NSLog(@"Test button tapped");
}
@end

已折叠：

展开：

GreenView.xib：

GrenenView.xib Struts和Springs：

Answer 1

如果我理解你只想剪辑它，如果按钮在视图范围之外。在-awakeFromNib添加：

self.clipsToBounds = YES;

使用此属性，您将告诉视图剪切不在其边界内的所有内容，即使视图位于外部，也可以查看绘制子视图。如果你经常使用它或者在重型动画中使用它，那么通过性能会有点贵 一种方法可以是在视图崩溃时隐藏它。

Answer 2

您将框架更改为frame.origin.y = 200;

我认为你必须在你的nib文件中设置相对于UIButton的{​​{1}}约束