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将View转化为图片

将View转化为图片

作者: pond | 来源:发表于2016-08-11 13:31 被阅读0次

    在view上面添加一张图片,然后将View转化为一张图片

    + (UIImage *)getBgViewFrame:(CGRect)rect withDefaultImage:(UIImage *)placeImage {

    UIView *bgView = [[UIView alloc]initWithFrame:rect];

    bgView.backgroundColor =[self colorFromHexString:@"#f0f0f0"];

    UIImageView *imgView = [[UIImageView alloc]init];

    imgView.image = placeImage;

    [bgView addSubview:imgView];

    imgView.sd_layout

    .centerXEqualToView(bgView)

    .centerYEqualToView(bgView)

    .widthIs(placeImage.size.width)

    .heightIs(placeImage.size.height);

    CGSize size = rect.size;

    // 下面方法,第一个参数表示区域大小。第二个参数表示是否是非透明的。如果需要显示半透明效果,需要传NO,否则传YES。第三个参数就是屏幕密度了

    UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);

    [bgView.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;

    }

    //16进制颜色转成UIColor类型

    - (UIColor *) colorFromHexString:(NSString *)hexString {

    NSString *cleanString = [hexString stringByReplacingOccurrencesOfString:@"#" withString:@""];

    {

    if([cleanString length] == 3) {

    cleanString = [NSString stringWithFormat:@"%@%@%@%@%@%@",

    [cleanString substringWithRange:NSMakeRange(0, 1)],[cleanString substringWithRange:NSMakeRange(0, 1)],

    [cleanString substringWithRange:NSMakeRange(1, 1)],[cleanString substringWithRange:NSMakeRange(1, 1)],

    [cleanString substringWithRange:NSMakeRange(2, 1)],[cleanString substringWithRange:NSMakeRange(2, 1)]];

    }

    }

    if([cleanString length] == 6) {

    cleanString = [cleanString stringByAppendingString:@"ff"];

    }

    unsigned int baseValue;

    [[NSScanner scannerWithString:cleanString] scanHexInt:&baseValue];

    float red = ((baseValue >> 24) & 0xFF)/255.0f;

    float green = ((baseValue >> 16) & 0xFF)/255.0f;

    float blue = ((baseValue >> 8) & 0xFF)/255.0f;

    float alpha = ((baseValue >> 0) & 0xFF)/255.0f;

    return [UIColor colorWithRed:red green:green blue:blue alpha:alpha];

    }

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