iOS 写一个弹框基类 （baseAlert）

弹框是一个应用必不可少的控件，但是光是用系统丑丑的弹框，往往不能满足我们的需求，很多时候我们需要做一个自定义的弹框，但是 show 和 hide 效果都要统一，那么我就想到来写一个弹框的BaseView.写一个base 弹框baseView 有一个好处，不用重复写一堆如此show 和hide 的效果，写来看怎么使用。

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1 使用
(1)第一方式继承
继承

7FA9E491-84CA-49E2-B096-898D2A3591DB.png

方法重载

//重载setAlertView  把你想要alertView 写出来
-(void)setAlertView
{
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, ScreenWidth, 280)];
    view.backgroundColor = [UIColor blueColor];
    [self addSubview:view];
}
// show 执行
-(void)showToDO
{
    NSLog(@"showing ---------");
}
//hide执行
-(void)hideToDO
{
    NSLog(@"hiding -----------");
}

（2）第二种方式 是直接使用baseAlert 初始化函数

/**
 *  初始化
 *
 *  @param type  中部alert 还是底部alert
 *  @param isNav 是否包含导航栏
 *  @param setUIAlertBlock 设置alertView
 *  @param showUIBlock     显示alertView
 *  @param hideUIBlock     隐藏lertView
 *
 *  @return <#return value description#>
 */
-(instancetype)initWithType:(DTAlertType)type andWithNav:(BOOL)nav andSetUIAlert:(alertBlock)setUIAlertBlock andShowUIBlock:(alertBlock)showUIBlock andHideUIBlock:(alertBlock)hideUIBlock;

//例子
 DTBaseAlertView *alertView = [[ DTBaseAlertView alloc]initWithType:DTAlertTypeBottom andWithNav:NO andSetUIAlert:^(UIView *superView){
                UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, ScreenWidth, 280)];
                view.backgroundColor = [UIColor blueColor];
                [superView addSubview:view];
                
            } andShowUIBlock:^(UIView *superView){
                NSLog(@"showing  ---");
            } andHideUIBlock:^(UIView *superView){
                NSLog(@"hideing ----");
            }];
 [self.view addSubview:alertView];
  [alertView show];

2 简单代码分析

 UIView *bgView = self.subviews[0];
        UIView *alertView = self.subviews[1];
        bgView.alpha = 0;
        CGRect frame = alertView.frame;
        frame.origin.y = ScreenHeight;
        alertView.frame = frame;
        [UIView animateWithDuration:0.5 delay:0 usingSpringWithDamping:0.5 initialSpringVelocity:2 options:UIViewAnimationOptionCurveEaseIn animations:^{
            if (alertType == DTAlertTypeCenter) {
                CGRect frame = alertView.frame;
                frame.origin.x = (ScreenWidth - alertView.frame.size.width)/2;
                frame.origin.y = (ScreenHeight-alertView.frame.size.height)/2;
                alertView.frame = frame;
            }
            if (alertType == DTAlertTypeBottom) {
                CGRect frame = alertView.frame;
                frame.origin.x = (ScreenWidth - alertView.frame.size.width)/2;
                float y = ScreenHeight-alertView.frame.size.height;
                if (isNav) {
                    y = ScreenHeight-64-alertView.frame.size.height;
                }
                frame.origin.y = y;
                alertView.frame = frame;
            }
            bgView.alpha = 0.5;
        } completion:nil];

主要是通过superview 的 subview 数组获取到alertView(弹框) 然后在对通过uiviewanimation 对他做 frame 改变的过渡动画

例子可以看我的github 地址https://github.com/heysunnyboy/BaseAlert.git