UIWebView
// [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.baidu.com"]]];
// webView继承自scrollView，也设置内容尺寸
// self.webView.scrollView.contentInset = UIEdgeInsetsMake(20, 0, 0, 0);
// 网页内容是否适应屏幕尺寸
// self.webView.scalesPageToFit = YES;
// 检测各种特殊的字符串：比如电话、网站
/*
UIDataDetectorTypePhoneNumber = 1 << 0, // Phone number detection
UIDataDetectorTypeLink = 1 << 1, // URL detection
UIDataDetectorTypeAddress NS_ENUM_AVAILABLE_IOS(4_0) = 1 << 2, // Street address detection
UIDataDetectorTypeCalendarEvent NS_ENUM_AVAILABLE_IOS(4_0) = 1 << 3, // Event detection
UIDataDetectorTypeShipmentTrackingNumber NS_ENUM_AVAILABLE_IOS(10_0) = 1 << 4, // Shipment tracking number detection
UIDataDetectorTypeFlightNumber NS_ENUM_AVAILABLE_IOS(10_0) = 1 << 5, // Flight number detection
UIDataDetectorTypeLookupSuggestion NS_ENUM_AVAILABLE_IOS(10_0) = 1 << 6, // Information users may want to look up
UIDataDetectorTypeNone = 0, // Disable detection
UIDataDetectorTypeAll = NSUIntegerMax // Enable all types, including types that may be added later
*/
self.webView.dataDetectorTypes = UIDataDetectorTypeAll;
// webView也可以加载网页、ppt等等
// [self.webView loadData:<#(nonnull NSData *)#> MIMEType:<#(nonnull NSString *)#> textEncodingName:<#(nonnull NSString *)#> baseURL:<#(nonnull NSURL *)#>];
// [self.webView loadHTMLString:@"<html><body><div style=\"color:red;font-size:1000px;border:10px solid blue;\">wu zhuangzhuang</div></body></html>" baseURL:nil];
// [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:@"/Users/xiaomage/Desktop/test.pptx"]]];
// [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.520it.com"]]];
[self.webView loadRequest:[NSURLRequest requestWithURL:[[NSBundle mainBundle] URLForResource:@"test" withExtension:@"html"]]];
- 这些方法可以对网页进行操作
- (void)reload;
- (void)stopLoading;
- (void)goBack;
- (void)goForward;
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
self.gobackBtn.enabled = webView.canGoBack;
self.fowardBtn.enabled = webView.canGoForward;
}
- 利用JavaScript获取当前网页的标题
// 利用JavaScript获取当前网页的标题
self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
- 通过这个方法完成JS调用OC
/**
* 每当webView即将发送一个请求之前，都会调用这个方法
* 返回YES：允许加载这个请求
* 返回NO：禁止加载这个请求
*/
/**
* 通过这个方法完成JS调用OC
* JS和OC交互的第三方框架：WebViewJavaScriptBridge
*/
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
// NSLog(@"%@",request.URL);
// 当前要加载的地址
NSString *url = request.URL.absoluteString;
// 自定义的协议头
NSString *scheme = @"wzz://";
// 如果加载的地址包含自定义的协议头，说明是要调用OC的方法
if ([url hasPrefix:scheme]) {
// 用自定义协议头的长度来切割加载的地址获得协议头后面的内容 sendMessage_number_?10086&11111
NSString *path = [url substringFromIndex:scheme.length];
// 利用?来切割方法名
NSArray *subPath = [path componentsSeparatedByString:@"?"];
// 取出subPath第一元素，把_改为:获得方法名
NSString *methodName = [[subPath firstObject] stringByReplacingOccurrencesOfString:@"_" withString:@":"];
// 获得参数
NSString *parma = [subPath lastObject];
NSArray *subParmas = nil;
// 判断有没有参数
if (subPath.count == 2 || [parma containsString:@"&"]) {
subParmas = [parma componentsSeparatedByString:@"&"];
}
// 取出前面两个参数
NSString *firstParma = [subParmas firstObject];
NSString *secondParma = subParmas.count <= 1 ? nil : [subParmas lastObject];
// 调用方法
[self performSelector:NSSelectorFromString(methodName) withObject:firstParma withObject:secondParma];
return NO;
}
NSLog(@"Want Load Other Request");
return YES;
}
- 为NSObject添加分类
#import "NSObject+Extension.h"
@implementation NSObject (Extension)
/*
* 这个分类用来调用方法，并传入参数
*/
- (id)performSelector:(SEL)selector withObjects:(NSArray *)objects
{
// 方法签名(签名的描述)
NSMethodSignature *signature = [[self class] instanceMethodSignatureForSelector:selector];
// 判断是否signature有没有值
if (! signature) {
// 没有值就给警告，防止程序闪退
// 第一种
// @throw [NSException exceptionWithName:@"强" reason:@"方法找不到" userInfo:nil];
// 第二种
[NSException raise:@"强" format:@"%@ 方法找不到",NSStringFromSelector(selector)];
}
// NSInvocation : 利用一个NSInvocation对象包装一次方法调用（方法调用者、方法名、方法参数、方法返回值）
// You must set the receiver’s target, selector, and argument values before calling this method.
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
// 设置invocation信息
invocation.target = self;
invocation.selector = selector;
// 设置参数
// signature.numberOfArguments : 里面包含了self、_cmd
NSInteger paramsCount = signature.numberOfArguments - 2;
// 获得参数个数
paramsCount = MIN(paramsCount, objects.count);
for (NSUInteger i = 0; i < paramsCount; i++) {
id object = objects[i];
// 参数值为空，防止报错
if ([object isKindOfClass:[NSNull class]]) continue;
[invocation setArgument:&object atIndex:i + 2];
}
// 调用方法
[invocation invoke];
// 获取返回值
id returnValue = nil;
// methodReturnLength 没有返回值时，为0
if (signature.methodReturnLength) { // 有返回值类型，才去获得返回值
// 这个方法会将返回值传到这个参数
[invocation getReturnValue:&returnValue];
}
return returnValue;
}
@end
- 强制去除警告信息
/ 强制去除警告
//#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"// Wincompatible-pointer-types 警告的类型
// 在这里写会发出警告的代码
//#pragma clang diagnostic pop