Update README.md

Author: penoty

README.md

@@ -1,14 +1,11 @@
 # NSMutableAttributedString-Simple
 Simplify the process of creating NSMutableAttributedString with block. 使用链式调用简化Objective-c富文本创建过程。
 
-    NSMutableAttributedString *test = [NSMutableAttributedString stringWithFormat:@"%@  %@\r\n%@" strings:@[
-        @"Test1".setSystemFontSize(28.f).setColorWithName(@"red")
-                .setUnderlineStyle(@(NSUnderlineStyleDouble)).setUnderlineColor([UIColor blueColor]),
-        @"Test2".setBoldSystemFontSize(25.f).setGreenColor()
-                .setStrikelineStyle(@(NSUnderlineStyleThick)).setStrikelineColor([UIColor blueColor]),
-        @"Test3".setSystemFontSize(30.f).setColorWithRGB(0xfb8800)
-                .setUnderlineStyle(@(NSUnderlinePatternDash | NSUnderlineStyleThick)).setUnderlineColor([UIColor blueColor])
-                .setStrikelineStyle(@(NSUnderlineStyleThick)).setStrikelineColor([UIColor blueColor]),
+    NSMutableAttributedString *attributedStr = [NSMutableAttributedString stringWithFormat:@"%@\r\n%@\r\n%@" strings:@[
+        @"Test1".setBackgroundColor([UIColor redColor]).setSystemFontSize(20.f).setColor([UIColor blueColor]),
+        @"Test2".setUnderlineColor([UIColor yellowColor]).setUnderlineStyle(@(NSUnderlineStyleThick))
+                .setSystemFontSize(30.f).setColorWithRGB(0xfb8800),
+        @"Test3".setStrikelineStyle(@(NSUnderlineStyleThick)).setStrikelineColor([UIColor blueColor])
     ]];
 
-![image](https://github.com/penoty/NSMutableAttributeString-Simple/blob/master/test_sample.png )
+![image](https://github.com/penoty/NSMutableAttributeString-Simple/blob/master/test.png )