截屏 iOS

#pragma mark - 截屏

+ (UIImage *_Nonnull)screenShotWithController:(UIViewController *_Nonnull)controller;

+ (UIColor *_Nonnull)colorWithHexString:(NSString *_Nonnull)color;

.m

+ (UIColor *)colorWithHexString:(NSString *)color

{

    NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];

    

    // String should be 6 or 8 characters

    if ([cString length] < 6) {

        return [UIColor clearColor];

    }

    

    // strip 0X if it appears

    if ([cString hasPrefix:@"0X"])

        cString = [cString substringFromIndex:2];

    if ([cString hasPrefix:@"#"])

        cString = [cString substringFromIndex:1];

    if ([cString length] != 6)

        return [UIColor clearColor];

    

    // Separate into r, g, b substrings

    NSRange range;

    range.location = 0;

    range.length = 2;

    

    //r

    NSString *rString = [cString substringWithRange:range];

    

    //g

    range.location = 2;

    NSString *gString = [cString substringWithRange:range];

    

    //b

    range.location = 4;

    NSString *bString = [cString substringWithRange:range];

    

    // Scan values

    unsigned int r, g, b;

    [[NSScanner scannerWithString:rString] scanHexInt:&r];

    [[NSScanner scannerWithString:gString] scanHexInt:&g];

    [[NSScanner scannerWithString:bString] scanHexInt:&b];

    

    return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];

}

#pragma mark - 截屏

+ (UIImage *_Nonnull)screenShotWithController:(UIViewController *)controller {

    // 默认ios7中控制器是包含了状态栏的

    CGSize size = controller.view.frame.size;

    // 开启上下文,使用参数之后,截出来的是原图（YES 0.0 质量高）

    UIGraphicsBeginImageContextWithOptions(size, YES, 0.0);

    // 裁剪的关键代码,要裁剪的矩形范围

    CGRect rect = CGRectMake(0, 0, size.width, size.height);

    

    [controller.view drawViewHierarchyInRect:rect afterScreenUpdates:NO];

    // 从上下文中,取出UIImage

    UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext();

    //结束上下文(移除栈顶上下文)

    UIGraphicsEndImageContext();

    

    return snapshot;

}

//调用，截屏

APP_Delegate.backgroundImage = [Tools screenShotWithController:self];