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
