swift
iOS 跳转到任意某个rootViewController
x 代表第几个根视图，任意视图跳转哦
self.tabBarController.selectedViewController = self.tabBarController.childViewControllers[X];
[self.navigationController popToRootViewControllerAnimated:YES];
iOS ViewController 截屏方法
vc.backimage = self.snapView(targetView: self.view)截屏方法
//截屏
func snapView(targetView: UIView) -> UIImage {
UIGraphicsBeginImageContextWithOptions(targetView.bounds.size, false, 0)
// iOS7.0 之后系统提供的截屏的功能
targetView.drawHierarchy(in: targetView.bounds, afterScreenUpdates: false)
let snapdImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return snapdImage!
}
//改变状态栏颜色
override var preferredStatusBarStyle: UIStatusBarStyle {
if statusBarShouldLight {
return .lightContent
} else {
return .default
}
}
/// 更改图片颜色
public func imageWithTintColor(color : UIColor) -> UIImage{
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
let context = UIGraphicsGetCurrentContext()
context?.translateBy(x: 0, y: self.size.height)
context?.scaleBy(x: 1.0, y: -1.0)//kCGBlendModeNormal
context?.setBlendMode(.normal)
let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
context?.clip(to: rect, mask: self.cgImage!)
color.setFill()
context?.fill(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage!
}
//scrollView偏移问题
只要scrollView是其父视图上的第一个子视图，且navigationBar不隐藏的情况下，添加到scrollView里的视图，都会默认下移64个像素。ios11好像没问题,解决冲突 在前面加个view或禁止系统偏移 vc.automaticallyadjustsScrollviewInsets ＝NO 这个好像不行
///hidesBottomBarWhenPushed push跳转时隐藏/显示UITabBar
self.hidesBottomBarWhenPushed = false
//关闭视图过渡动画
UIView.performWithoutAnimation {
tableView刷新会跳动之类的这些奇怪的动画，把刷新方法放在这里就可以了
}