//.h文件

#import <UIKit/UIKit.h>

@interface UIImage (XG)

/**

 *  @param icon         頭像圖片名稱

 *  @param borderImage  邊框的圖片名稱

 *  @param border       邊框大小

 *

 *  @return 圓形的頭像圖片

 */

+ (instancetype)imageWithIconName:(NSString *)icon borderImage:(NSString *)borderImage border:(int)border;

@end

//.m文件

#import "UIImage+XG.h"

@implementation UIImage (XG)

+ (instancetype)imageWithIconName:(NSString *)icon borderImage:(NSString *)borderImage border:(int)border{

    //頭像圖片

    UIImage * image = [UIImage imageNamed:icon];

    //邊框圖片

    UIImage * borderImg = [UIImage imageNamed:borderImage];

    //

    CGSize size = CGSizeMake(image.size.width + border, image.size.height + border);

    //創建圖片上下文

    UIGraphicsBeginImageContextWithOptions(size, NO, 0);

    //繪制邊框的圓

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextAddEllipseInRect(context, CGRectMake(0, 0, size.width, size.height));

    //剪切可視范圍

    CGContextClip(context);

    //繪制邊框圖片

    [borderImg drawInRect:CGRectMake(0, 0, size.width, size.height)];

    //設置頭像frame

    CGFloat iconX = border / 2;

    CGFloat iconY = border / 2;

    CGFloat iconW = image.size.width;

    CGFloat iconH = image.size.height;

    //繪制圓形頭像范圍

    CGContextAddEllipseInRect(context, CGRectMake(iconX, iconY, iconW, iconH));

    //剪切可視范圍

    CGContextClip(context);

    //繪制頭像

    [image drawInRect:CGRectMake(iconX, iconY, iconW, iconH)];

    //取出整個圖片上下文的圖片

    UIImage *iconImage = UIGraphicsGetImageFromCurrentImageContext();

    return iconImage;

}

@end

  borderImage 是邊框  不需要的話給nil就可以

　　border 　　是邊框寬度 不需要的話給0就行了

UIImage * image = [UIImage imageWithIconName:@"頭像.png" borderImage:nil border:0];