iOS 简单封装一个可以自定义内容的AlertView的界面

落日映苍穹つ 2022-05-15 00:21 364阅读 0赞

//
    //  BTBaseAlertView.h
    //  Test
    //
    //  Created by liuyinghui on 2018/8/22.
    //  Copyright © 2018年 liuyinghui. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface BTBaseAlertView : UIView
    
    @property (strong, nonatomic) UIView *contentView;
    
    - (void)show;
    
    - (void)hide;
    
    @end

//
    //  BTBaseAlertView.m
    //  Test
    //
    //  Created by liuyinghui on 2018/8/22.
    //  Copyright © 2018年 liuyinghui. All rights reserved.
    //
    
    #import "BTBaseAlertView.h"
    
    @interface BTBaseAlertView ()
    @property (strong, nonatomic) UIView *backgroundView;
    @end
    
    @implementation BTBaseAlertView
    
    - (instancetype)init {
        if (self = [super initWithFrame:[UIScreen mainScreen].bounds]) {
            self.backgroundColor = [UIColor clearColor];
            
            _backgroundView = [[UIView alloc] initWithFrame:self.frame];
            _backgroundView.backgroundColor = [UIColor blackColor];
            [self addSubview:_backgroundView];
        }
        return self;
    }
    
    - (void)show {
        UIWindow *window = [[UIApplication sharedApplication] keyWindow];
        NSArray *windowViews = [window subviews];
        if(windowViews && [windowViews count] > 0){
            UIView *subView = [windowViews objectAtIndex:[windowViews count]-1];
            for(UIView *aSubView in subView.subviews)
            {
                [aSubView.layer removeAllAnimations];
            }
            [subView addSubview:self];
            [self showBackground];
            [self showAlertAnimation];
        }
    }
    
    
    - (void)hide {
        _contentView.hidden = YES;
        [self hideAlertAnimation];
        [self removeFromSuperview];
    }
    
    - (void)setContentView:(UIView *)contentView {
        _contentView = contentView;
        _contentView.center = self.center;
        [self addSubview:_contentView];
    }
    
    - (void)showBackground
    {
        _backgroundView.alpha = 0;
        [UIView beginAnimations:@"fadeIn" context:nil];
        [UIView setAnimationDuration:0.35];
        _backgroundView.alpha = 0.4;
        [UIView commitAnimations];
    }
    
    -(void)showAlertAnimation
    {
        CAKeyframeAnimation * animation;
        animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
        animation.duration = 0.30;
        animation.removedOnCompletion = YES;
        animation.fillMode = kCAFillModeForwards;
        NSMutableArray *values = [NSMutableArray array];
        [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9, 0.9, 1.0)]];
        [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.1, 1.1, 1.0)]];
        [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];
        animation.values = values;
        [_contentView.layer addAnimation:animation forKey:nil];
    }
    
    - (void)hideAlertAnimation {
        [UIView beginAnimations:@"fadeIn" context:nil];
        [UIView setAnimationDuration:0.35];
        _backgroundView.alpha = 0.0;
        [UIView commitAnimations];
    }
    
    //点击屏幕空白处去掉键盘
    - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
    {
        if ([touches anyObject].view != _contentView) {
            // 判断点击的区域如果不是菜单按钮_btnMenu, 则关闭菜单
            [self hide];
        }
    }
    @end

使用方法

BTBaseAlertView *alert = [[BTBaseAlertView alloc] init];
        UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
        [contentView setBackgroundColor:[UIColor greenColor]];
        alert.contentView = contentView;
        UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 50, 20)];
        [btn setBackgroundColor:[UIColor redColor]];
        [btn addTarget:self action:@selector(btnPress:) forControlEvents:UIControlEventTouchUpInside];
        [contentView addSubview:btn];
        [alert show];