ios自定义带有同意拒绝按钮文本框的提示框alert

RejectView.h
UIPlaceHolderTV的创建连接

typedef void(^SureBlocks) (NSString *rejectReasonText);
/**
 驳回view
 */
@interface RejectView : UIView
/**
 显示
 */
- (void)showRejectView;
/**
 回调block
 */
@property SureBlocks sureBlock;
/**
 文本框
 */
@property UIPlaceHolderTV *reasonTextView;
/**
 标题
 */
@property UILabel *titleLabel;

RejectView.m

#define WIDTH [UIApplication sharedApplication].keyWindow.frame.size.width
#define HEIGHT [UIApplication sharedApplication].keyWindow.frame.size.height

@interface RejectView()
@property UIView *rejectBGView;

@end

@implementation RejectView
-(instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
    if (self) {
        self.alpha = 0;
        self.backgroundColor = [UIColor blackColor];
        self.rejectBGView = [[UIView alloc] initWithFrame:frame];
        self.rejectBGView.center = self.center;
        self.rejectBGView.backgroundColor = [UIColor whiteColor];
        self.rejectBGView.layer.cornerRadius = 15;
        self.rejectBGView.alpha = 0;
        
        self.titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(30, 16, frame.size.width-60, 30)];
        self.titleLabel.text = @"拒绝原因";
        self.titleLabel.font = [UIFont systemFontOfSize:19];
        [self.rejectBGView addSubview:self.titleLabel];
        
        self.reasonTextView = [[UIPlaceHolderTV alloc] initWithFrame:CGRectMake(30, 55, frame.size.width-60, frame.size.height-55-45-5) adaption:NO];
        self.reasonTextView.placeholder = @"请输入拒绝原因";
        self.reasonTextView .font = [UIFont systemFontOfSize:14];
        self.reasonTextView.textContainerInset = UIEdgeInsetsMake(10,0, 0, 0);
        [self.rejectBGView addSubview: self.reasonTextView];
        
        UIButton *cancalBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        [cancalBtn setTitle:@"取消" forState:UIControlStateNormal];
        cancalBtn.layer.cornerRadius = 15;
        cancalBtn.titleLabel.font = [UIFont systemFontOfSize:15];
        cancalBtn.frame = CGRectMake(frame.size.width/2-105, frame.size.height-45, 80, 30);
        [cancalBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [cancalBtn setBackgroundColor:[UIColor colorWithRed:200/255.0 green:200/255.0 blue:200/255.0 alpha:1]];
        [self.rejectBGView addSubview:cancalBtn];
        [cancalBtn addTarget:self action:@selector(cancelAction:) forControlEvents:UIControlEventTouchUpInside];
        
        UIButton *sureBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        sureBtn.frame = CGRectMake(frame.size.width/2+25, frame.size.height-45, 80, 30);
        [sureBtn setBackgroundColor:[UIColor redColor]];
        sureBtn.layer.cornerRadius = 15;
        sureBtn.titleLabel.font = [UIFont systemFontOfSize:15];
        [sureBtn setTitle:@"确定" forState:UIControlStateNormal];
        [sureBtn addTarget:self action:@selector(sureAction:) forControlEvents:UIControlEventTouchUpInside];
        [self.rejectBGView addSubview:sureBtn];
    }
    return self;
}

- (void)hideRejectView{
    [self getCurrentVC].navigationController.interactivePopGestureRecognizer.enabled = YES;
    [self.rejectBGView endEditing:YES];
    [UIView animateWithDuration:0.3 animations:^{
        
        self.alpha = 0;
        self.rejectBGView.alpha = 0;
    }];
}

- (void)showRejectView{

    [self getCurrentVC].navigationController.interactivePopGestureRecognizer.enabled = NO;
    self.reasonTextView.text = @"";
    [self.superview.superview addSubview:self.rejectBGView];
    [UIView animateWithDuration:0.3 animations:^{
        
        self.alpha = 0.5;
        self.rejectBGView.alpha = 1;
    }];
}

- (void)cancelAction:(UIButton *)btn{
    [self hideRejectView];
}

- (void)sureAction:(UIButton *)btn{
    if (self.delegate) {
        
        [self.delegate rejectReason:self.reasonTextView.text index:self.index];
    }
    if (self.sureBlock) {
        self.sureBlock(self.reasonTextView.text);
    }
    if (self.reasonTextView.text.length > 0) {
        
        [self hideRejectView];
    }
}

- (UIViewController *)getCurrentVC {
    UIViewController *rootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;
    
    UIViewController *currentVC = [self getCurrentVCFrom:rootViewController];
    
    return currentVC;
}

- (UIViewController *)getCurrentVCFrom:(UIViewController *)rootVC{
    UIViewController *currentVC;
    
    if ([rootVC presentedViewController]) {
        // 视图是被presented出来的
        
        rootVC = [rootVC presentedViewController];
    }
    
    if ([rootVC isKindOfClass:[UITabBarController class]]) {
        // 根视图为UITabBarController
        
        currentVC = [self getCurrentVCFrom:[(UITabBarController *)rootVC selectedViewController]];
        
    } else if ([rootVC isKindOfClass:[UINavigationController class]]){
        // 根视图为UINavigationController
        
        currentVC = [self getCurrentVCFrom:[(UINavigationController *)rootVC visibleViewController]];
        
    } else {
        // 根视图为非导航类
        
        currentVC = rootVC;
    }
    
    return currentVC;
}