iOS - 毛玻璃动画效果

声明全局变量

#define kMainBoundsHeight   ([UIScreen mainScreen].bounds).size.height //屏幕的高度
#define kMainBoundsWidth    ([UIScreen mainScreen].bounds).size.width //屏幕的宽度
const CGFloat animalDuration  = 0.25;   //添加动画延时效果

ViewController.m

//
//  ViewController.m
//  iPhone
//
//  Created by zlw on 2018/4/10.
//  Copyright © 2018年 xujinzhong. All rights reserved.
//

#import "ViewController.h"
#import "Masonry.h"
#import "ReactiveObjC.h"
#import "showV.h"

@interface ViewController ()

@end

@implementation ViewController
{
    UIButton *_doneBtn;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];

    _doneBtn = [[UIButton alloc] init];
    _doneBtn.backgroundColor = [UIColor grayColor];
    _doneBtn.layer.cornerRadius = ;
    _doneBtn.layer.masksToBounds = YES;
    [_doneBtn setTitle:@"show" forState:UIControlStateNormal];
    [self.view addSubview:_doneBtn];

    [_doneBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.offset();
        make.centerX.equalTo(self.view);
        make.width.offset();
        make.height.offset();
    }];

    __block showV *_showView;
    [[_doneBtn rac_signalForControlEvents:UIControlEventTouchDown]subscribeNext:^(__kindof UIControl * _Nullable x) {
        _showView = [[showV alloc] init];
        [self.view addSubview:_showView];
        _showView.frame = CGRectMake(, , kMainBoundsWidth, kMainBoundsHeight);
        [_showView showViewData];
    }];
}

@end

showV.h

//
//  showV.h
//  iPhone
//
//  Created by zlw on 2018/4/10.
//  Copyright © 2018年 xujinzhong. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface showV : UIView

-(void)showViewData;

@end

showV.m

//
//  showV.m
//  iPhone
//
//  Created by zlw on 2018/4/10.
//  Copyright © 2018年 xujinzhong. All rights reserved.
//

#import "showV.h"
#import "Masonry.h"
#import "ReactiveObjC.h"

@interface showV ()

@property(nonatomic, strong) UIView *bkView;
@property(nonatomic, strong) UIVisualEffectView *alphView;
@property(nonatomic, strong) NSString *content;

@end

@implementation showV

-(instancetype)init{
    self = [super init];

    if (self) {
        self.backgroundColor = [UIColor whiteColor];
    }

    return self;
}

-(NSString *)content{
    if (!_content) {
        _content = @"您将要激活闪电下单模式。通过点击下面的“我接受这些合同条款”，您会承认您已经阅读并理解以下合同条款，您同意特此遵守。您当前的程序端版本使您在下面的订单提交模式间选择。您同意遵守本规定的条款和条件，有关这样的模式。\n\n1. 订单提交的默认模式是两步处理法。使用默认模式，您需先选择买卖方向，然后您需要选择一个合适的订单类型，它的参数并且根据您选定的具体订单类型和您的交易意愿，通过点击买入，卖出，下单，确认您订单的提交。使用默认模式，您的订单将直到您完成前面提到的两个步骤才会提交。\n\n2. 订单提交的闪电下单模式是一步处理法。使用闪电下单模式，您的订单将会被直接提交，而无需再次确认。不会有后续确认提示您点击。一旦您点击，您将无法撤销或更改您的订单。在正常市场条件和系统性能下，市价订单提交后，单子会立即成交。\n\n您可以在【开启闪电下单按钮】停用闪电下单模式。\n\n通过选择闪电下单模式，您了解到您的订单将根据您点击卖或买价进行提交，没有后续订单确认。您同意并接受您选择的订单提交模式相关的全部风险，包括，但不限于，过失风险，提交订单时发生的失误。\n\n您同意完全赔偿和使ZLW TRADING 在由您，您的交易经理或任何代表您进行交易的人，造成的任何错误遗漏或失误而导致的结果引起的各种损失，成本和费用上免受损失。\n";
    }
    return _content;
}

-(void)showViewData{
    UIColor *bkColor = [UIColor blackColor];
    UIColor *whileColor = [UIColor whiteColor];
    UIColor *grayColor = [UIColor grayColor];

    UIBlurEffect *beffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
    _alphView = [[UIVisualEffectView alloc] initWithEffect:beffect];
    [self addSubview:_alphView];
    _alphView.alpha = ;

    [_alphView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self);
    }];

    self.bkView = [[UIView alloc] init];
    [self addSubview:self.bkView];
    self.bkView.backgroundColor = bkColor;
    self.bkView.frame = CGRectMake(, kMainBoundsHeight-, kMainBoundsWidth, );

    UILabel *labTitle = [UILabel new];
    labTitle.text = @"免责声明";
    labTitle.textAlignment = NSTextAlignmentCenter;
    labTitle.backgroundColor = bkColor;
    labTitle.textColor = whileColor;
    [self.bkView addSubview:labTitle];

    [labTitle mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.top.equalTo(self.bkView);
        make.width.equalTo(self.bkView);
        make.height.offset();
    }];

    UITextView *textV = [UITextView new];
    textV.backgroundColor = bkColor;
    textV.textColor = grayColor;
    textV.font = [UIFont systemFontOfSize:];
    textV.text = self.content;
    textV.editable = NO;
    [self.bkView addSubview:textV];

    [textV mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(labTitle.mas_bottom);
        make.centerX.equalTo(self.bkView);
        make.width.equalTo(self.bkView).offset(-);
        make.bottom.equalTo(self.bkView).offset(-);
    }];

    UIButton *closeBtn = [UIButton new];
    [closeBtn setTitle:@"关闭" forState:UIControlStateNormal];
    closeBtn.backgroundColor = [UIColor blueColor];
    [self.bkView addSubview:closeBtn];
    [closeBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(textV.mas_bottom);
        make.centerX.equalTo(textV);
        make.width.equalTo(self.bkView);
        make.bottom.equalTo(self.bkView);
    }];

    [[closeBtn rac_signalForControlEvents:UIControlEventTouchDown] subscribeNext:^(__kindof UIControl * _Nullable x) {
        [UIView animateWithDuration:animalDuration animations:^{
            self.alphView.alpha = 0.0;
            self.bkView.frame = CGRectMake(, kMainBoundsHeight, kMainBoundsWidth, );
        } completion:^(BOOL finished) {
            [self removeFromSuperview];
        }];
    }];

    [UIView animateWithDuration:animalDuration animations:^{
        self.alphView.alpha = 1.0;
        self.bkView.frame = CGRectMake(, kMainBoundsHeight-, kMainBoundsWidth, );
    }];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    [UIView animateWithDuration:animalDuration animations:^{
        self.alphView.alpha = 0.0;
        self.bkView.frame = CGRectMake(, kMainBoundsHeight, kMainBoundsWidth, );
    } completion:^(BOOL finished) {
        [self removeFromSuperview];
    }];

}

@end