如何为 Swift 转换 MONActivityView 方法

Question

我正在尝试使用用 Obj-C 编写的自定义 ActivityIndi​​catorView。它包含在 UIView 框架中将指示器居中所需的方法。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]];
}

link到GitHub是https://github.com/mownier/MONActivityIndicatorView

如何在 Swift 中使用它？

Answer 1

这是您要找的吗？将 objective-c 转换为 swift ？如果是这样，这是翻译：

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;)