iOS 自定义自带放大和保存功能imageView

一、GMZoomImageView具有放大和保存图片的功能。

使用方式
1.导入头文件GMZoomImageView.h
2.将UIImageView替换GMZoomImageView即可

在GMZoomImageView.h暴露了移除手势和添加手势的入口。
- (void)addTapGesture;//添加点击手势

- (void)removeTapGesture;//移除点击手势

//- (void)addLongGesture;//添加长按手势
//
//- (void)removeLongGestrue;//移除长按手势

保存图片成功或失败的弹窗提醒，处理了控制器上添加了view视图，造成弹出的弹窗被view遮挡。

UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"提示" message:message preferredStyle:UIAlertControllerStyleAlert];
    [alertVC addAction:action];
    UIView *backView = [[UIApplication sharedApplication].keyWindow viewWithTag:101];
    if (backView) {
        //处理放大图片后，无法模态弹出UIAlertController的解决方式
        UIWindow *window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
        window.tag = 102;
        window.userInteractionEnabled = NO;
        window.backgroundColor = [UIColor clearColor];
        
        UIViewController *rootVC = [[UIViewController alloc] init];
        rootVC.view.backgroundColor = [UIColor clearColor];
        window.windowLevel = UIWindowLevelAlert + 1;
        [window makeKeyAndVisible];
        window.rootViewController = rootVC;
        [backView addSubview:window];
        [rootVC presentViewController:alertVC animated:YES completion:nil];
    } else {
        UIViewController *vc = [UIApplication sharedApplication].keyWindow.rootViewController;
        [vc presentViewController:alertVC animated:YES completion:nil];
    }
    

二、另外：自定义的CustomSheet底部弹窗，类似微信，参考http://www.devashen.com/blog/2016/01/22/assheet/

根据不同枚举类型，弹窗样式不一样。
typedef NS_ENUM(NSInteger, CustomSheetType) {//提示框类型
    CustomSheetTypeDefault,     //默认 标示没有红字
    CustomSheetTypePrompt,      //title 标示有标题
    CustomSheetTypeWarn,        //title 警告标识(红色字体) 显示红字(比如"删除"显示红色)
};

使用方式：
CustomSheet *sheet = [[CustomSheet alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height) titleArr:@[@"保存图片"] sheetType:CustomSheetTypeDefault];
        __weak typeof(sheet) weakSheet = sheet;
        sheet.Click = ^(NSInteger clickIndex) {
            switch (clickIndex) {
                    case 0:
                    //TODO 
                    break;
                default:
                    break;
            }
            [weakSheet hiddenSheet:^(BOOL isHidden) {
                
            }];
        };
        [[UIApplication sharedApplication].keyWindow addSubview:sheet];
    }

GMZoomImageView链接：GMZoomImageView