WHGradientHelper

iOS渐变，支持——线性渐变，径向渐变，渐变动画，lable字体渐变，lable字体渐变动画

最终效果：

• 线性渐变
• 径向渐变
• 渐变动画
• Lable字体渐变
• Lable字体渐变动画

1. 线性渐变(Linear Gradient)

“线性渐变”按照渐变方向分成4种类型，分别是：

typedef NS_ENUM(NSInteger, WHGradientDirection) {
    WHLinearGradientDirectionLevel,                 //AC - BD
    WHLinearGradientDirectionVertical,              //AB - CD
    WHLinearGradientDirectionUpwardDiagonalLine,    //A - D
    WHLinearGradientDirectionDownDiagonalLine,      //C - B
};
//      A         B
//       _________
//      |         |
//      |         |
//       ---------
//      C         D

2. 径向渐变(Radial Gradient)

3. 渐变动画(ChromatoAnimation)

4. Lable字体渐变

5. Lable字体渐变动画

WHGradientHelper头文件及使用

#import <UIKit/UIKit.h>

#define kDefaultWidth 200
#define kDefaultHeight 200

typedef NS_ENUM(NSInteger, WHGradientDirection) {
    WHLinearGradientDirectionLevel,                 //AC - BD
    WHLinearGradientDirectionVertical,              //AB - CD
    WHLinearGradientDirectionUpwardDiagonalLine,    //A - D
    WHLinearGradientDirectionDownDiagonalLine,      //C - B
};
//      A         B
//       _________
//      |         |
//      |         |
//       ---------
//      C         D

@interface WHGradientHelper : NSObject

//   Linear Gradient
+ (UIImage *)getLinearGradientImage:(UIColor *)startColor and:(UIColor *)endColor directionType:(WHGradientDirection)directionType;/* CGSizeMake(kDefaultWidth, kDefaultHeight) */
+ (UIImage *)getLinearGradientImage:(UIColor *)startColor and:(UIColor *)endColor directionType:(WHGradientDirection)directionType option:(CGSize)size;

//    Radial Gradient
+ (UIImage *)getRadialGradientImage:(UIColor *)centerColor and:(UIColor *)outColor;/* raduis = kDefaultWidth / 2 */
+ (UIImage *)getRadialGradientImage:(UIColor *)centerColor and:(UIColor *)outColor option:(CGSize)size;

//   ChromatoAnimation
+ (void)addGradientChromatoAnimation:(UIView *)view;


//   LableText LinearGradient and ChromatoAnimation
+ (void)addLinearGradientForLableText:(UIView *)parentView lable:(UILabel *)lable start:(UIColor *)startColor and:(UIColor *)endColor;  /* don't need call 'addSubview:' for lable */
+ (void)addGradientChromatoAnimationForLableText:(UIView *)parentView lable:(UILabel *)lable; /* don't need call 'addSubview:' for lable */

具体实现

简书地址