修改页面加载字段名称，及方式

@@ -89,7 +89,7 @@ typedef NS_OPTIONS(NSInteger, YHEventReportTrackType) {
 };
 
 typedef NS_ENUM(NSInteger, YHEventReportPointName) {
-    YHPN_VIEWCONTROLLER, //UIViewController 加载时间  // @"PAGE"
+    YHPN_VIEWCONTROLLER, //UIViewController 加载时间  // @"PAGEMETRICS"
     YHPN_WEBVIEW,//UIWebView 加载时间                 // @"WEBVIEW"
     YHPN_IMAGEVIEW,//Image (SDWebImage) 加载时间      // @"IMAGE"
     YHPN_BUTTON,//Button 响应时间                     // @"BUTTON"

@@ -140,7 +140,7 @@
     NSString *str = @"";
     switch (pointName) {
         case YHPN_VIEWCONTROLLER:
-            str = @"PAGE";
+            str = @"PAGEMETRICS";
             break;
         case YHPH_HTTPMETRICS:
             str = @"HTTPMETRICS";

@@ -119,7 +119,15 @@
 -(void)yher_viewDidAppear:(BOOL)animated {
     @try {
         if (self.shouldTrack && !self.yher_hasReported) {
+            CFRunLoopRef mainrunloop = CFRunLoopGetMain();
+            CFStringRef runLoopMode = kCFRunLoopDefaultMode;
+            CFRunLoopObserverRef observer = CFRunLoopObserverCreateWithHandler(kCFAllocatorDefault, kCFRunLoopBeforeWaiting, true, 0, ^(CFRunLoopObserverRef observer, CFRunLoopActivity activity) {
                 [[YH_EventCollector sharedInstance] timeEventEndWithViewController:self];
+                CFRunLoopRemoveObserver(mainrunloop, observer, runLoopMode);
+            });
+            CFRunLoopAddObserver(mainrunloop, observer, runLoopMode);
+            CFRelease(observer);
+            
         }
         if ([YHEventReport sharedInstance].isAppCrashReportEnable && [YHEventReport sharedInstance].isAutoTrackEnabled) {