iOS 自定义弹窗UIAlertView —— HERO博客

上一篇简述了iOS系统弹窗的使用，具体使用可以参考iOS 弹窗UIAlertView、UIActionSheet、UIAlertController简述。

本篇自定义了一个继承UIWindow的弹窗，可以自定义弹窗样式，效果图如下：

下面贴上相关代码：（没有使用图片，所以代码中图片为空）

ViewController：

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end


#import "ViewController.h"
#import "HWAlertView.h"

@interface ViewController ()<HWAlertViewDelegate>

@property (nonatomic, strong) HWAlertView *alertView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];

    //创建控件
    [self creatContorl];
}

- (void)creatContorl
{
    //创建按钮
    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(50, 150, 100, 30)];
    btn.backgroundColor = [UIColor orangeColor];
    [btn setTitle:@"HERO博客" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnOnClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
}

- (void)btnOnClick
{
    //初始化
    _alertView = [[HWAlertView alloc] initWithFrame:[UIScreen mainScreen].bounds];
    //显示alertView
    [_alertView show];
    //设置代理
    _alertView.delegate = self;
}

#pragma mark - HWAlertViewDelegate
- (void)alertView:(HWAlertView *)alertView didSelectOptionButtonWithTag:(NSInteger)tag
{
   if (tag == 1) {
        //跳转至博客
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://blog.csdn.net/hero_wqb"]];
    }

    _alertView.hidden = YES;
    _alertView = nil;
}

@end

HWAlertView：

#import <UIKit/UIKit.h>

@class HWAlertView;

@protocol HWAlertViewDelegate <NSObject>

/**
 *  HWAlertView代理方法，选项按钮点击事件
 *
 *  @param alertView HWAlertView
 *  @param tag       选项按钮tag值，左0右1
 */
- (void)alertView:(HWAlertView *)alertView didSelectOptionButtonWithTag:(NSInteger)tag;

@end

@interface HWAlertView : UIWindow

@property (nonatomic, weak) id<HWAlertViewDelegate> delegate;

- (void)show;
- (void)dismiss;

@end


#import "HWAlertView.h"

@implementation HWAlertView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

        self.windowLevel = UIWindowLevelAlert;

        //背景遮盖
        UIView *backView = [[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds];
        backView.backgroundColor = [UIColor blackColor];
        backView.alpha = 0.7;
        [self addSubview:backView];

        //弹窗背景图片
        UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@""]];
        imageView.frame = CGRectMake(0, 0, 280, 120);
        imageView.center = CGPointMake(self.center.x, self.center.y);
        imageView.contentMode = UIViewContentModeScaleToFill;
        imageView.userInteractionEnabled = YES;
        imageView.backgroundColor = [UIColor whiteColor];
        [self addSubview:imageView];

        //弹窗标题
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 10, 280, 40)];
        label.text = @"是否进入HERO博客";
        label.textAlignment = NSTextAlignmentCenter;
        [imageView addSubview:label];

        //选项按钮
        NSArray *titleArray = @[@"取消", @"确定"];
        NSArray *imageArray = @[@"", @""];
        for (int i = 0; i < imageArray.count; i++) {
            UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(40 + 120 * i, 70, 80, 30)];
            [btn setTitle:titleArray[i] forState:UIControlStateNormal];
            [btn setImage:[UIImage imageNamed:imageArray[i]] forState:UIControlStateNormal];
            btn.tag = i;
            btn.backgroundColor = [UIColor grayColor];
            [btn addTarget:self action:@selector(btnOnClick:) forControlEvents:UIControlEventTouchUpInside];
            [imageView addSubview:btn];
        }
    }
    return self;
}

- (void)show
{
    [self makeKeyAndVisible];
}

- (void)dismiss
{
    [self resignKeyWindow];
    [self removeFromSuperview];
}

- (void)btnOnClick:(UIButton *)btn
{
    if (_delegate && [_delegate respondsToSelector:@selector(alertView:didSelectOptionButtonWithTag:)]) {
        [_delegate alertView:self didSelectOptionButtonWithTag:btn.tag];
    }
}

@end

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