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
- 线性渐变
- 径向渐变
- 渐变动画
- Lable字体渐变
- Lable字体渐变动画
“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
#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 */