erpsuiteios/RedAnt ERP Mobile/common/CommonEditor/CommonEditorWebCell.m

//
//  CommonEditorWebCell.m
//  RedAnt Mobile
//
//  Created by Jack on 2017/11/17.
//  Copyright © 2017年 Ray. All rights reserved.
//

#import "CommonEditorWebCell.h"

@interface CommonEditorWebCell() <UIWebViewDelegate>

@end

@implementation CommonEditorWebCell

- (void)awakeFromNib {
    [super awakeFromNib];
    // Initialization code
    [self setup];
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    if (self = [super initWithCoder:aDecoder]) {
        [self setup];
    }
    return self;
}

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
        [self setup];
    }
    return self;
}

- (void)dealloc {
    [self removeObserver:self forKeyPath:@"self.webview.scrollView.frame"];
}

- (void)setup {
    self.webview.scrollView.bounces=NO;
    self.webview.scrollView.directionalLockEnabled = true;
    
    [self addObserver:self forKeyPath:@"self.webview.scrollView.frame" options:NSKeyValueObservingOptionNew context:nil];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
    if ([keyPath isEqualToString:@"self.webview.scrollView.frame"]) {
        [self updateContentHeight];
    }
}

#pragma mark - Web Delegate

- (void)updateContentHeight {
    
    NSString *h_str = [self.webview stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight;"];
    float h = [h_str floatValue];
    
    if (self.webDelegate) {
        [self.webDelegate commonEditorWebCell:self didChangeContentHeight:h];
    }
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    
    [self updateContentHeight];
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
    [self updateContentHeight];
}

@end