iOS Tips

(lldb) p UIScreen.mainScreen.bounds
error: property 'bounds' not found on object of type 'id'
error: 1 errors parsing expression
(lldb) expr @import UIKit
(lldb) p UIScreen.mainScreen.bounds
(CGRect) $1 = (origin = (x = 0, y = 0), size = (width = 414, height = 736))
(lldb)

@implementation lzxzWebViewUtility : NSObject

+ (id)uiWebDocumentView:(UIWebView *)webview
{
NSString *str = @"_documentView";
id documentView = [webview performSelector:NSSelectorFromString(str)];
id coreWebView = [documentView performSelector :@selector(webView)];
return coreWebView;
}

+(NSString *)langzuxiaoziUA:(UIWebView *)webview
{
static NSString* lbUA=nil;

NSString*  appUA=objc_msgSend([lzxzWebViewUtility uiWebDocumentView:webview], NSSelectorFromString(@"applicationNameForUserAgent"));

if(lbUA == nil){
lbUA=[[appUA stringByAppendingFormat:@" langzuxiaozi/%@",[lzxzUIGlobal appBuildNum]] retain];
}
return lbUA;
}

+ (void)changeWebview:(UIWebView *)webview UserAgent:(NSString*)strUA
{
SEL sel = NSSelectorFromString(@"setApplicationNameForUserAgent:");

[[lzxzWebViewUtility uiWebDocumentView:webview] performSelector:sel withObject:strUA];
}

@end

//获取到带langzuxiaozi字符的ua
NSString* strUA = [lzxzWebViewUtility langzuxiaoziUA:self.webView];
//设置webview自定义ua
[lzxzWebViewUtility changeWebview:self.webView UserAgent:strUA];