优化渐变色实现，支持rgb(a)和16进制

alibaba · Jan 2, 2024 · ec21140 · ec21140
1 parent 1756551
commit ec21140
Showing 1 changed file with 70 additions and 44 deletions.
diff --git a/GaiaXiOS/GaiaXiOS/Utilities/GXGradientHelper.m b/GaiaXiOS/GaiaXiOS/Utilities/GXGradientHelper.m
@@ -18,8 +18,10 @@
 
 #import "GXGradientHelper.h"
 #import "NSDictionary+GX.h"
+#import "GXCacheCenter.h"
 #import "NSArray+GX.h"
 #import "UIColor+GX.h"
+#import "GXCache.h"
 #import "GXUtils.h"
 
 @interface GXGradientView () {
@@ -251,60 +253,84 @@ + (UIImage *)renderImageFromLayer:(CALayer *)layer{
 #pragma mark - 解析渐变色
 
 + (NSDictionary *)parserLinearGradient:(NSString *)linearGradient{
-    if (![linearGradient hasPrefix:@"linear-gradient("] || ![linearGradient hasSuffix:@")"]) {
-        return nil;
-    }
     NSMutableDictionary *dict = nil;
+    // 掐头去尾 
     NSString *linearString = [linearGradient substringWithRange:NSMakeRange(16, [linearGradient length]-17)];
-    NSArray *linearArray = [linearString componentsSeparatedByString:@","];
-    if (linearArray.count) {
-        //构建渐变数据源
-        dict = [NSMutableDictionary dictionaryWithCapacity:2];
-        NSMutableArray *locations = [NSMutableArray arrayWithCapacity:2];
-        NSMutableArray *colors = [NSMutableArray arrayWithCapacity:2];
-        for (NSUInteger i = 0; i < [linearArray count]; i++) {
-            NSString *linear = linearArray[i];
-            if (i == 0) {
-                //解析location
-                linear = [linear stringByReplacingOccurrencesOfString:@" " withString:@""];
-                [dict gx_setValue:linear forKey:@"direction"];
-            } else {
-                //解析颜色
-                linear = [linear stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
-                if ([linear hasSuffix:@"%"]) {
-                    //包含百分比，设置location
-                    NSArray *linears = [linear componentsSeparatedByString:@" "];
-                    for (int j = 0; j < linears.count; j++) {
-                        NSString *tmpLinear = linears[j];
-                        if (j == 0) {
-                            linear = tmpLinear;
-                        } else {
-                            //添加location
-                            if (tmpLinear.length > 1) {
-                                NSNumber *location = @([[tmpLinear substringToIndex:tmpLinear.length-1] floatValue] / 100.0f);
-                                [locations gx_addObject:location];
-                            }
-                        }
-                    }
+    // 解析内容
+    NSRegularExpression *regex = [self linearGradientRegular];
+    if (regex) {
+        NSArray *matches = [regex matchesInString:linearString options:0 range:NSMakeRange(0, [linearString length])];
+        if (matches.count > 0) {
+            dict = [NSMutableDictionary dictionaryWithCapacity:2];
+            NSMutableArray *locations = [NSMutableArray array];
+            NSMutableArray *colors = [NSMutableArray array];
+            NSString *direction = @"";
+
+            for (NSTextCheckingResult *match in matches) {
+                // direction
+                NSRange directionRange = [match rangeAtIndex:1];
+                if (directionRange.location != NSNotFound) {
+                    direction = [linearString substringWithRange:directionRange];
+                    direction = [direction stringByReplacingOccurrencesOfString:@" " withString:@""];
+                    continue;
+                }
+
+                // colors
+                NSRange colorRange = [match rangeAtIndex:2];
+                if (colorRange.location != NSNotFound) {
+                    NSString *color = [linearString substringWithRange:colorRange];
+                    [colors addObject:color];
+                }
+
+                // locations
+                NSRange locationRange = [match rangeAtIndex:3];
+                if (locationRange.location != NSNotFound) {
+                    NSString *locationString = [linearString substringWithRange:locationRange];
+                    locationString = [locationString stringByReplacingOccurrencesOfString:@"" withString:@"%"];
+                    NSNumber *location = @([locationString floatValue] / 100.0f);
+                    [locations addObject:location];
                 }
-
-                //添加颜色
-                [colors gx_addObject:linear];
             }
+
+            // direction
+            [dict gx_setValue:direction forKey:@"direction"];
+
+            // location和color一致时才会设置
+            if (locations.count && (locations.count == colors.count)) {
+                [dict gx_setObject:locations forKey:@"locations"];
+            }
+
+            // 设置color
+            [dict gx_setObject:colors forKey:@"colors"];
         }
 
-        //location和color一致时才会设置
-        if (locations.count && (locations.count == colors.count)) {
-            [dict gx_setObject:locations forKey:@"locations"];
-        }
-
-        //设置color
-        [dict gx_setObject:colors forKey:@"colors"];
     }
-    
+
     return dict;
 }
 
++ (NSRegularExpression *)linearGradientRegular{
+    NSString *key = @"linear-gradient";
+    GXCache *cahche = [GXCacheCenter defaulCenter].regularCahche;
+    NSRegularExpression *regular = [cahche objectForKey:key];
+    // 缓存为空创建表达式
+    if (regular == nil) {
+        // 获取正则的string
+        NSError *error = NULL;
+        NSString *regexStr = @"(to\\s+\\w+)|(rgba?\\([^)]+\\)|#\\w{3,8})\\s*(\\d+%)*";
+        regular = [NSRegularExpression regularExpressionWithPattern:regexStr
+                                                            options:NSRegularExpressionCaseInsensitive
+                                                              error:&error];
+        if (regular) {
+            [cahche setObject:regular forKey:key];
+        }
+
+    }
+    // 返回
+    return regular;
+}
+
+
 
 @end