iOS 使用UIColor创建UIImage
示例
迅速
let color = UIColor.redColor() let size = CGSize(width: 200, height: 200) UIGraphicsBeginImageContextWithOptions(size, false, 0.0) CGContextSetFillColorWithColor(UIGraphicsGetCurrentContext(), color.CGColor) CGContextFillRect(UIGraphicsGetCurrentContext(), CGRect(origin: .zero, size: size)) let colorImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext()
迅捷3
let color = UIColor.red()
let size = CGSize(width: 200, height: 200)
UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
if let context = UIGraphicsGetCurrentContext() {
context.setFillColor(color.cgColor)
context.fill(CGRect(origin: .zero, size: size))
let colorImage = UIGraphicsGetImageFromCurrentImageContext()
}
UIGraphicsEndImageContext()目标C：
将此方法添加为的扩展UIImage：
+ (UIImage *)createImageWithColor: (UIColor *)color {
CGRect rect=CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}