1.1 加载某个网页
1.2 MK自带加载进度条
1.加载某个URL
需导入 #import <WebKit/WebKit.h>
@property (nonatomic , strong)WKWebView *mainWebView;
self.mainWebView = [[WKWebView
alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
NSURL *url = [NSURL
URLWithString:@"http://www.jianshu.com/users/d10b02ea2d91/latest_articles"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[self.mainWebView loadRequest:request];
[self.view addSubview:self.mainWebView];
1.2 MK自带加载进度条
#import "ViewController.h"
#import <WebKit/WebKit.h>
#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width //屏幕宽度
#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height //屏幕高度
@interface ViewController ()
@property (nonatomic, strong) WKWebView *mainWebView;
@property (nonatomic, strong) UIProgressView *progressView;
@end
@implementation ViewController
#pragma mark Life Cycle
- (void)viewDidLoad {
[super viewDidLoad];
[self.view addSubview:self.mainWebView];
[self.view addSubview:self.progressView];
[self.self.mainWebView loadRequest:[NSURLRequest
requestWithURL:[NSURL URLWithString:@"http://www.jianshu.com/users
/d10b02ea2d91/latest_articles"]]];
[self.mainWebView addObserver:self
forKeyPath:@"estimatedProgress"
options:NSKeyValueObservingOptionNew
context:nil];
}
#pragma mark KVO
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary<NSString *,id> *)change
context:(void *)context
{
if ([keyPath isEqualToString:@"estimatedProgress"]) {
self.progressView.progress = self.mainWebView.estimatedProgress;
// 加载完成
if (self.mainWebView.estimatedProgress >= 1.0f ) {
[UIView animateWithDuration:0.5f animations:^{
self.progressView.alpha = 0.0f;
self.progressView.progress = 0.0f;
}];
}else{
self.progressView.alpha = 1.0f;
}
}
}
- (WKWebView *)mainWebView {
if (!_mainWebView) {
_mainWebView = [[WKWebView alloc] init];
_mainWebView.autoresizingMask =
UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
_mainWebView.backgroundColor = [UIColor whiteColor];
_mainWebView.scrollView.showsVerticalScrollIndicator = NO;
_mainWebView.scrollView.showsHorizontalScrollIndicator = NO;
_mainWebView.frame = CGRectMake(0, 64, SCREEN_WIDTH,
SCREEN_HEIGHT - 64);
}
return _mainWebView;
}
- (UIProgressView *)progressView {
if (!_progressView) {
_progressView = [[UIProgressView alloc] init];
_progressView.frame = CGRectMake(0, 64, SCREEN_WIDTH, 2);
}
return _progressView;
}
//移除通知
- (void)dealloc {
[self.mainWebView removeObserver:self forKeyPath:@"estimatedProgress"
context:nil];
}
@end
