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];