開(kāi)發(fā)中,如果對(duì)于同一套圖,需要設(shè)置不同顏色,可以通過(guò)程序自行渲染

1.方法聲明

#import <UIKit/UIKit.h>

@interface UIImage (Tint)

/**
 *  為圖片填充自定義顏色
 *
 *  @param tintColor 需要填充的顏色
 *
 *  @return 填充后的顏色
 */
- (UIImage *)imageWithTintColor:(UIColor *)tintColor;

/**
 *  為圖片填充自定義顏色
 *
 *  @param tintColor 需要填充的顏色
 *
 *  @return 填充后的顏色
 */
- (UIImage *)imageWithGradientTintColor:(UIColor *)tintColor;

@end

2.方法實(shí)現(xiàn)

#import "UIImage+Tint.h"

@implementation UIImage (Tint)

- (UIImage *) imageWithTintColor:(UIColor *)tintColor
{
    return [self imageWithTintColor:tintColor blendMode:kCGBlendModeDestinationIn];
}

- (UIImage *) imageWithGradientTintColor:(UIColor *)tintColor
{
    return [self imageWithTintColor:tintColor blendMode:kCGBlendModeOverlay];
}

- (UIImage *) imageWithTintColor:(UIColor *)tintColor blendMode:(CGBlendMode)blendMode
{
    UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0f);
    [tintColor setFill];
    CGRect bounds = CGRectMake(0, 0, self.size.width, self.size.height);
    UIRectFill(bounds);
    
    [self drawInRect:bounds blendMode:blendMode alpha:1.0f];
    
    if (blendMode != kCGBlendModeDestinationIn) {
        [self drawInRect:bounds blendMode:kCGBlendModeDestinationIn alpha:1.0f];
    }
    
    UIImage *tintedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return tintedImage;
}

@end