1.替换tab动画

2.隐藏启动图插画

KulexiuForStudent/KulexiuForStudent/Base.lproj/LaunchScreen.storyboard

@@ -17,10 +17,10 @@
                         <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="launch_image" translatesAutoresizingMaskIntoConstraints="NO" id="DNM-9S-ntg">
+                            <imageView hidden="YES" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="launch_image" translatesAutoresizingMaskIntoConstraints="NO" id="DNM-9S-ntg">
                                 <rect key="frame" x="0.0" y="104" width="414" height="503"/>
                             </imageView>
-                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="launch_logo" translatesAutoresizingMaskIntoConstraints="NO" id="cKD-qW-RwA">
+                            <imageView hidden="YES" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="launch_logo" translatesAutoresizingMaskIntoConstraints="NO" id="cKD-qW-RwA">
                                 <rect key="frame" x="149.5" y="652" width="115" height="34"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="115" id="bfb-mC-dyi"/>