1. label设置nil的时候清理text

2. label支持ellipsize 特性"..." 字符串太长 "..." 的位置

Author: 城西

IOS/Demo/Demo/lua/demoC_Label.lua

@@ -31,6 +31,7 @@ lable3.textAlign(TextAlign.CENTER)
 lable3.callback(
     function()
         print("lable3");
+        lable3.text(nil);
     end
 );
 

IOS/LuaViewSDK/Classes/lvsdk/LVLabel.m

@@ -68,7 +68,9 @@ static int text (lv_State *L) {
         LVLabel* view = (__bridge LVLabel *)(user->object);
         if ( [view isKindOfClass:[LVLabel class]] ) {
             if( lv_gettop(L)>=2 ) {
-                if( lv_type(L, 2)==LV_TNUMBER ){
+                if ( lv_isnoneornil(L, 2 ) ) {
+                    view.text = nil;
+                } else if( lv_type(L, 2)==LV_TNUMBER ){
                     CGFloat text = lv_tonumber(L, 2);// 2
                     view.text = [NSString stringWithFormat:@"%f",text];
                     return 0;
@@ -222,6 +224,25 @@ static int textAlignment (lv_State *L) {
     return 0;
 }
 
+static int ellipsize (lv_State *L) {
+    LVUserDataInfo * user = (LVUserDataInfo *)lv_touserdata(L, 1);
+    if( user ){
+        LVLabel* view = (__bridge LVLabel *)(user->object);
+        if( lv_gettop(L)>=2 ) {
+            NSInteger lineBreakMode = lv_tonumber(L, 2);// 2
+            if( [view isKindOfClass:[LVLabel class]] ){
+                view.lineBreakMode = lineBreakMode;
+                return 0;
+            }
+        } else {
+            int lineBreakMode = view.lineBreakMode;
+            lv_pushnumber(L, lineBreakMode );
+            return 1;
+        }
+    }
+    return 0;
+}
+
 +(int) classDefine: (lv_State *)L {
     {
         lv_pushcfunction(L, lvNewLabel);
@@ -236,6 +257,7 @@ +(int) classDefine: (lv_State *)L {
         {"fontSize",    fontSize},
         {"textSize",    fontSize},
 
+        {"ellipsize",    ellipsize},
         {"textAlign",    textAlignment},
         {"gravity",    textAlignment},
 

IOS/LuaViewSDK/Classes/lvsdk/LVSystem.m

@@ -203,6 +203,26 @@ +(int) classDefine:(lv_State *)L {
         lv_pushnumber(L, NSTextAlignmentCenter);
         lv_setfield(L, -2, "CENTER");// 上下左右都居中
     }
+    {
+        // TextAlign常量. LEFT RIGHT CENTER
+        lv_settop(L, 0);
+        const struct lvL_reg lib [] = {
+            {NULL, NULL}
+        };
+        lvL_register(L, "Ellipsize", lib);// 文本太多 "..." 出现的问题
+        
+        lv_pushnumber(L, UILineBreakModeHeadTruncation);
+        lv_setfield(L, -2, "START");
+        
+        lv_pushnumber(L, UILineBreakModeMiddleTruncation);
+        lv_setfield(L, -2, "MIDDLE");
+        
+        lv_pushnumber(L, UILineBreakModeTailTruncation);
+        lv_setfield(L, -2, "END");
+        
+        lv_pushnumber(L, UILineBreakModeCharacterWrap);
+        lv_setfield(L, -2, "MARQUEE");
+    }
     {
         lv_settop(L, 0);
         const struct lvL_reg lib [] = {