我在视图控制器中向一个UIView添加了一个FBAdView。 (我将视图背景设置为红色) FBAdView是使用kFBAdSizeHeight50Banner的adSize创建的。 问题是FBAdView在添加时会计算其宽度,但在旋转设备后它不再计算其宽度
我尝试使用自动布局,但它无法正常工作
添加FBAdview的代码(使用红色背景添加到UILabel)
FBAdView *fbAdView = [[FBAdView alloc] initWithPlacementID:@"***************_***************"
adSize:kFBAdSizeHeight50Banner
rootViewController:self];
fbAdView.delegate = self;
[fbAdView loadAd];
[self.banner addSubview:fbAdView];
autolayout的代码 - 不起作用
// Width constraint, parent view width
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self.banner
attribute:NSLayoutAttributeWidth
multiplier:1
constant:0]];
// Height constraint, parent view height
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:self.banner
attribute:NSLayoutAttributeHeight
multiplier:1
constant:0]];
// Center horizontally
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:self.banner
attribute:NSLayoutAttributeCenterX
multiplier:1.0
constant:0.0]];
// Center vertically
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
toItem:self.banner
attribute:NSLayoutAttributeCenterY
multiplier:1.0
constant:0.0]];
// Height constraint, parent view height
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:self.banner
attribute:NSLayoutAttributeHeight
multiplier:1
constant:0]];
// Center horizontally
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:self.banner
attribute:NSLayoutAttributeCenterX
multiplier:1.0
constant:0.0]];
// Center vertically
[self.banner addConstraint:[NSLayoutConstraint constraintWithItem:fbAdView
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
toItem:self.banner
attribute:NSLayoutAttributeCenterY
multiplier:1.0
constant:0.0]];
打印屏幕 添加横幅时,它适合屏幕宽度 旋转后它不会改变它的宽度(就像它的父红色视图)
答案 0 :(得分:1)
我认为你错过了一些限制。
添加这些行(可能需要进行一些小的更改)会使您的代码工作:
self.banner.translatesAutoresizingMaskIntoConstraints = NO;
fbAdView.translatesAutoresizingMaskIntoConstraints = NO;
// Width constraint
[self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.banner
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.view
attribute:NSLayoutAttributeWidth
multiplier:1
constant:0]];
// Height constraint
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[banner(==50)]"
options:0
metrics:nil
views:NSDictionaryOfVariableBindings(banner)]];
发布了一个示例项目