iOS UITableVIewCell中webView设置高度问
若要在cell中显示webview，必须先知道webview的高度，才能给cell的代理方法赋值，关键就这一句话，通过监听实现获取webview高度，啥也不说了，直接上代码。
这个是cell里的.m文件的代码
#import "InformationDetailCell.h"
#import "WebView.h"
@interface InformationDetailCell()<UIWebViewDelegate>
@end
@implementation InformationDetailCell
-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
self.accessoryType = UITableViewCellAccessoryNone;
[self createUI];
}
return self;
}
-(void)createUI{
self.web= [[UIWebView alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.web.scrollView.scrollEnabled = NO;
[self.web sizeToFit];
[self.contentView addSubview:self.web];
self.web.delegate = self;
}
-(void)setModel:(InformationDetailDataModel *)model{
_model = model;
[self.web loadHTMLString:self.model.content baseURL:nil];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
//字体颜色
[self.web stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName('body')[0].style.webkitTextFillColor= 'white'"];
//页面背景色
[self.web stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName('body')[0].style.background='#18171D'"];
//获取到webview的高度
CGFloat height = [[webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] floatValue];
webView.frame=CGRectMake(0, 0, self.frame.size.width,height);
[webView sizeToFit];
NSDictionary *dic = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"%f",height] forKey:@"frame"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"ChangeCellHeight" object:nil userInfo:dic];
}
@end
然后是控制器里的代码
#import"InformationDetailVC.h"
#import "InformationDetailCell.h"
@interfaceInformationDetailVC()
{
CGFloat cellHeight;
BOOL isLoad;
int loadNumber;
}
@property (nonatomic, strong)InformationDetailDataModel *dataModel;
@end
@implementation InformationDetailVC
- (void)viewDidLoad {
[super viewDidLoad];
loadNumber= 0;
[self configTableView];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(ChangeCellHeight:) name:@"ChangeCellHeight" object:nil];
}
-(void)ChangeCellHeight:(NSNotification *)noti{
//使用userInfo处理消息
NSDictionary *dic = [noti userInfo];
NSString *info = [dic objectForKey:@"frame"];
cellHeight = [info floatValue];
if (!isLoad) {
[self.tableView reloadData];
if (loadNumber == 1) {
isLoad = YES;
dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3/*延迟执行时间*/ * NSEC_PER_SEC));
dispatch_after(delayTime, dispatch_get_main_queue(), ^{
[self.tableView reloadData];
self.tableView.alpha = 1;
});
}
loadNumber += 1;
}
}
-(void)configTableView{
WeakSelf
self.headerRefresh = ^{
[weakSelf loadData];
};
}
-(void)loadData{
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 2;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (section == 0) {
return 1;
}else{
return self.dataModel.snapList.count;
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
if (indexPath.section == 0) {
if (cellHeight == 0) {
return 0.1;
}else{
return cellHeight + 16;
}
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
InformationDetailCell *cell = [tableView dequeueReusableCellWithIdentifier:@"InformationDetailCell"];
if (cell == nil) {
cell = [[InformationDetailCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"InformationDetailCell"];
}
[cell setModel:self.dataModel];
return cell;
}
@end
