一，[_iconView sd_setImageWithURL:[NSURL URLWithString:item.image_list] placeholderImage:[UIImage imageNamed:@"defaultUserIcon"] options:SDWebImageCacheMemoryOnly completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {

// 1.開啟圖形上下文

// 比例因素:當(dāng)前點(diǎn)與像素比例

UIGraphicsBeginImageContextWithOptions(image.size, NO, 0);

// 2.描述裁剪區(qū)域

UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, image.size.width, image.size.height)];

// 3.設(shè)置裁剪區(qū)域;

[path addClip];

// 4.畫圖片

[image drawAtPoint:CGPointZero];

// 5.取出圖片

image = UIGraphicsGetImageFromCurrentImageContext();

// 6.關(guān)閉上下文

UIGraphicsEndImageContext();

_iconView.image = image;

}];

二，// 從xib加載就會(huì)調(diào)用一次

- (void)awakeFromNib {

// Initialization code

// 設(shè)置頭像圓角,iOS9蘋果修復(fù)

//? ? _iconView.layer.cornerRadius = 30;

//? ? _iconView.layer.masksToBounds = YES;

}