1v1_7/MSYOUPAI/3rd/飘屏/OCBarrage/CALayer+VQ_OCBarrage.m

//
//  CALayer+VQ_OCBarrage.m
//  OCBarrage
//
//  Created by QMTV on 2017/8/29.
//  Copyright © 2017年 LFC. All rights reserved.
//

#import "CALayer+VQ_OCBarrage.h"

@implementation CALayer (OCBarrage)

- (UIImage *)youpaifconvertContentToImageWithSize:(CGSize)contentSize {
    // 传入的View.frame.size是0的话，直接返回nil，防止 UIGraphicsBeginImageContext() 传入0，导致崩溃
    if (CGSizeEqualToSize(contentSize, CGSizeZero)) {
        return nil;
    }
    UIGraphicsBeginImageContextWithOptions(contentSize, 0.0, [UIScreen mainScreen].scale);
    //self为需要截屏的UI控件 即通过改变此参数可以截取特定的UI控件
    [self renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image= UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}


@end