截屏
- (UIImage *)screenshot:(UIView *)view
{
CGFloat scale = [[UIScreen mainScreen] scale];
UIImage *screenshot;
UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, scale);
{
if(UIGraphicsGetCurrentContext() == nil)
{
NSLog(@"UIGraphicsGetCurrentContext is nil. You may have a view (%@) with no really frame (%@)", [view class], NSStringFromCGRect(view.frame));
}
else
{
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
screenshot = UIGraphicsGetImageFromCurrentImageContext();
}
}
UIGraphicsEndImageContext();
return screenshot;
}
在圖片上繪制文字
//在圖片上繪制文字
+(UIImage *)DrawText:(NSString *)text forImage:(UIImage *)image{
CGSize size = CGSizeMake(image.size.width,image.size.height ); // 畫(huà)布大小
UIGraphicsBeginImageContextWithOptions(size,NO,0.0);
[image drawAtPoint:CGPointMake(0,0)];
// 獲得一個(gè)位圖圖形上下文
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextDrawPath(context,kCGPathStroke);
NSDictionary *attributes = @{ NSFontAttributeName:[UIFont systemFontOfSize:30.f], NSForegroundColorAttributeName:[UIColor redColor]};
//計(jì)算出文字的寬度 設(shè)置控件限制的最大size為圖片的size
CGSize textSize = [text boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size;
// 畫(huà)文字 讓文字處于居中模式
[text drawAtPoint:CGPointMake((size.width - textSize.width)/2,image.size.height - 40) withAttributes:attributes];
// 返回繪制的新圖形
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
最后編輯于 ：
?著作權(quán)歸作者所有,轉(zhuǎn)載或內(nèi)容合作請(qǐng)聯(lián)系作者
平臺(tái)聲明：文章內(nèi)容（如有圖片或視頻亦包括在內(nèi)）由作者上傳并發(fā)布，文章內(nèi)容僅代表作者本人觀點(diǎn)，簡(jiǎn)書(shū)系信息發(fā)布平臺(tái)，僅提供信息存儲(chǔ)服務(wù)。
