处理详情tag的背景色

keyBoard/Class/Categories/UIColor+Extension.h

@@ -11,6 +11,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface UIColor (Extension)
 + (UIColor *)colorWithHex:(int)hexValue;
++ (nullable UIColor *)colorWithHexString:(NSString *)hexString;
 @end
 
 NS_ASSUME_NONNULL_END

keyBoard/Class/Categories/UIColor+Extension.m

@@ -20,4 +20,25 @@
 {
     return [UIColor colorWithHex:hexValue alpha:1.0];
 }
+
++ (UIColor *)colorWithHexString:(NSString *)hexString
+{
+    if (hexString.length == 0) { return nil; }
+    NSString *clean = [[hexString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
+    if ([clean hasPrefix:@"#"]) {
+        clean = [clean substringFromIndex:1];
+    } else if ([clean hasPrefix:@"0X"]) {
+        clean = [clean substringFromIndex:2];
+    }
+    if (clean.length != 6 && clean.length != 8) { return nil; }
+    unsigned long long value = 0;
+    NSScanner *scanner = [NSScanner scannerWithString:clean];
+    if (![scanner scanHexLongLong:&value]) { return nil; }
+    if (clean.length == 6) {
+        return [UIColor colorWithHex:(int)value];
+    }
+    CGFloat alpha = ((value & 0xFF000000) >> 24) / 255.0;
+    int rgb = (int)(value & 0xFFFFFF);
+    return [UIColor colorWithHex:rgb alpha:alpha];
+}
 @end