我正在尝试使用用Obj-C编写的自定义ActivityIndicatorView。它包含在UIView框架中居中指示符所需的方法。我在Swift代码中使用它时遇到问题。这是代码。。。
- (void)placeAtTheCenterWithView:(UIView *)view {
[self.view addConstraint:[NSLayoutConstraint constraintWithItem:view
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:self.view
attribute:NSLayoutAttributeCenterX
multiplier:1.0f
constant:0.0f]];
[self.view addConstraint:[NSLayoutConstraint constraintWithItem:view
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
toItem:self.view
attribute:NSLayoutAttributeCenterY
multiplier:1.0f
constant:0.0f]];
}
GitHub的链接是https://github.com/mownier/MONActivityIndicatorView
如何在Swift中使用此功能?
这就是您想要的吗?将objective-c转换为swift?如果是这样的话,下面是翻译:
func placeAtTheCenterWithView(view: UIView) {
let xCenterConstraint = NSLayoutConstraint(item: view, attribute: .CenterX, relatedBy: .Equal, toItem: self.view, attribute: .CenterX, multiplier: 1, constant: 0)
let yCenterConstraint = NSLayoutConstraint(item: view, attribute: .CenterY, relatedBy: .Equal, toItem: self.view, attribute: .CenterY, multiplier: 1, constant: 0)
self.view.addConstraints([xCenterConstraint, yCenterConstraint])
}
干杯;)