erpsuiteios/RedAnt ERP Mobile/common/Functions/signature/SignatureViewController.m

//
//  SignatureViewController.m
//  RedAnt ERP Mobile
//
//  Created by Ray on 14-8-7.
//  Copyright (c) 2014年 United Software Applications, Inc. All rights reserved.
//
#define INTNUMBERS @"0123456789\n"
#import "SignatureViewController.h"
#import "RAUtils.h"
//#import "const.h"
@interface SignatureViewController ()

@end

@implementation SignatureViewController

+ (instancetype)ra_signatureViewControllerWithCompletion:(void (^)(UIImage *))blk {
    
    SignatureViewController * vc =[ [UIStoryboard storyboardWithName:@"signature"
                                                              bundle:[NSBundle mainBundle]]
                                   instantiateViewControllerWithIdentifier:@"SignatureViewController"];
    
    vc.onReturnImg = blk;
    return vc;
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}
-(BOOL) shouldAutorotate
{
    return false;
}
- (void)onBackClick:(UIButton *)sender {
    
    
    [self.navigationController popViewControllerAnimated:FALSE];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.navigationItem.title = self.title;
    
    // ==========================================
    // 1. 導航欄外觀修復 (防止變黑/透明)
    // ==========================================
    if (@available(iOS 15.0, *)) {
        UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];
        [appearance configureWithOpaqueBackground]; // 強制不透明
        appearance.backgroundColor = [UIColor whiteColor]; // 背景白
        appearance.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor blackColor]};
        
        self.navigationController.navigationBar.standardAppearance = appearance;
        self.navigationController.navigationBar.scrollEdgeAppearance = appearance;
    } else {
        self.navigationController.navigationBar.barTintColor = [UIColor whiteColor];
        self.navigationController.navigationBar.translucent = NO;
    }
    
    // ==========================================
    // 2. 視圖佈局修復 (防止黑邊)
    // ==========================================
    // 禁止頂部延伸(避開導航欄)，允許其他方向延伸(鋪滿底部)
    self.edgesForExtendedLayout = UIRectEdgeAll & ~UIRectEdgeTop;
    // 設置底色為白，防止加載時透出黑色
    self.view.backgroundColor = [UIColor whiteColor];
    
    
    // ==========================================
    // 3. 初始化畫板 (使用 Auto Layout)
    // ==========================================
    if(self.linewidth == 0)
        self.linewidth = 5;
    
    EAGLContext *context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
    
    // 【修改重點】初始化傳 CGRectZero，並關閉 Autoresizing 轉換
    self.signatureView = [[SignatureView alloc] initWithFrame:CGRectZero context:context];
    self.signatureView.translatesAutoresizingMaskIntoConstraints = NO;
    self.signatureView.backgroundColor = [UIColor whiteColor];
    
    // 設置邊框樣式
    self.signatureView.layer.borderColor = [UIColor darkGrayColor].CGColor;
    self.signatureView.layer.borderWidth = 1.0;
    
    [self.view addSubview:self.signatureView];
    
    // 【修改重點】添加約束，將畫板強行釘死在父視圖的四個邊緣
    // 這樣無論屏幕多長，它都會自動拉伸填滿，徹底消除底部黑邊
    [NSLayoutConstraint activateConstraints:@[
        [self.signatureView.topAnchor constraintEqualToAnchor:self.view.topAnchor],
        [self.signatureView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor],
        [self.signatureView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor],
        [self.signatureView.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor]
    ]];
    
    
    // ==========================================
    // 4. 導航欄按鈕設置 (保持原有邏輯)
    // ==========================================
    UIBarButtonItem *closeButton = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed:@"back"] imageWithRenderingMode:UIImageRenderingModeAutomatic]
                                                                    style:UIBarButtonItemStylePlain
                                                                   target:self
                                                                   action:@selector(onBackClick:)];
    self.navigationItem.leftBarButtonItem = closeButton;
    
    UIBarButtonItem *clearBtn = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed:@"clear"] imageWithRenderingMode:UIImageRenderingModeAutomatic]
                                                                 style:UIBarButtonItemStylePlain
                                                                target:self
                                                                action:@selector(onClear:)];
    
    UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed:@"save"] imageWithRenderingMode:UIImageRenderingModeAutomatic]
                                                                style:UIBarButtonItemStylePlain
                                                               target:self
                                                               action:@selector(onDone:)];
    
    UIBarButtonItem *settingBtn = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed:@"signature_setting"] imageWithRenderingMode:UIImageRenderingModeAutomatic]
                                                                   style:UIBarButtonItemStylePlain
                                                                  target:self
                                                                  action:@selector(onSetting:)];
    
    if (UIDevice.currentDevice.userInterfaceIdiom == UIUserInterfaceIdiomPhone) {
        self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:doneBtn, clearBtn, nil];
    } else {
        self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:doneBtn, clearBtn, settingBtn, nil];
    }
    
    [self.navigationController.navigationBar layoutIfNeeded];
    
    // 設置畫筆參數
    [self.signatureView setLineWidth:self.linewidth];
    self.signatureView.foregroundLineColor = [UIColor colorWithRed:0.204 green:0.596 blue:0.859 alpha:1.000];
}
- (UIImage *)addImage:(UIImage *)image size:(CGSize )size {
    UIGraphicsBeginImageContext(size);
    UIImage *cleanImage = UIGraphicsGetImageFromCurrentImageContext();
    
    // Draw image1
    
    
    [image drawInRect:CGRectMake((size.width-image.size.width)/2,(size.height-image.size.height)/2, image.size.width, image.size.height)];
    
    // Draw image2
    [cleanImage drawInRect:CGRectMake(0, 0, cleanImage.size.width, cleanImage.size.height)];
    
    UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    return resultingImage;
}
- (void)onSetting:(UIButton *)sender {
    
    UIAlertController *alertControl = [UIAlertController alertControllerWithTitle:@"Change line width" message:nil preferredStyle:UIAlertControllerStyleAlert];
    //block代码块取代了delegate
    
    
    [alertControl addTextFieldWithConfigurationHandler:^(UITextField *textField) {
        textField.text = [NSString stringWithFormat:@"%d",self.linewidth];
        textField.keyboardType=UIKeyboardTypeNumberPad;
        textField.delegate = self;
        
        
    }];
    
    UIAlertAction *actionOne = [UIAlertAction actionWithTitle:@"Save" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {
        if(self.linewidth>16||self.linewidth<1)
        {
            int newlinewidth = 0;
            if(self.linewidth>16)
            {
                self.linewidth = 16;
                newlinewidth=16;
            }
            else if(self.linewidth<1)
            {
                self.linewidth = 1;
                newlinewidth=1;
            }

            
            
            [RAUtils message_box:@"Line width should between 1 and 16" message:[NSString stringWithFormat:@"Line width has been set to %d.",newlinewidth]  completion:nil];
        }
        
            [self.signatureView setLineWidth:self.linewidth];

    }];
    
    UIAlertAction *alertthree = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
       // DebugLog(@"Cancel");
    }];
    [alertControl addAction:actionOne];
    
    [alertControl addAction:alertthree];
    
    //UIAlertControllerStyle类型为UIAlertControllerStyleAlert可以添加addTextFieldWithConfigurationHandler:^(UITextField *textField)
    
    
    [self presentViewController:alertControl animated:YES completion:nil];
    
}
- (void)onDone:(UIButton *)sender {
    
    DebugLog(@"onDone");
    
    UIImage* img = [self.signatureView signatureImage];

//    return ;
//    CGSize imgsize = img.size;
    NSData* data = [self.signatureView signatureData];
    
   if (self.Signaturedelegate && [self.Signaturedelegate respondsToSelector:@selector(SignatureVCReturnImage:indexPath:)]) {
       [self.Signaturedelegate SignatureVCReturnImage:img indexPath:self.indexPath];
   }
    
    if (self.Signaturedelegate && [self.Signaturedelegate respondsToSelector:@selector(SignatureVCReturnData:indexPath:)]) {
        [self.Signaturedelegate SignatureVCReturnData:data indexPath:self.indexPath];
    }

    
    
    [self.navigationController popViewControllerAnimated:true];
    if(self.onReturnImg)
        self.onReturnImg(img);
    //    [self.aBNewPersonNav dismissViewControllerAnimated:true completion:^{
    //        ;
    //    }];
}
- (void)onClear:(UIButton *)sender {
    [self.signatureView clear];

}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


#pragma mark textField delegate
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    
     NSCharacterSet *cs;

        cs = [[NSCharacterSet characterSetWithCharactersInString:INTNUMBERS]invertedSet];
    
    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs]componentsJoinedByString:@""];
    
    BOOL canChange = [string isEqualToString:filtered];
    
   
    return canChange;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
    
    self.linewidth = [textField.text intValue];
  
    
}

//- (void)textFieldDidBeginEditing:(UITextField *)textField
//{
//    DebugLog(@"textField shouldChangeCharactersInRange");
//    
//    self.lastedit = textField;
//    UITableViewCell *cell = (UITableViewCell *) textField.superview.superview;
//    self.lastedit_from  = [self.editorTable indexPathForCell:cell];
//}


/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

//- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
//    self.signatureView.frame = self.view.bounds;
//}
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext>  _Nonnull context) {
        // what ever you want to prepare
    } completion:^(id<UIViewControllerTransitionCoordinatorContext>  _Nonnull context) {
        self.signatureView.frame = self.view.bounds;
    }];
}
@end