我有一个名为theImageView的UIImageView, UIImage是单色的(透明背景),就像下面左边的黑色心形。我如何在iOS 7或更高的系统中,根据iOS 7+导航栏图标中使用的色调方法,以编程方式更改此图像的色调颜色?
这个方法也适用于WatchKit的Apple Watch应用程序吗?
我有一个名为theImageView的UIImageView, UIImage是单色的(透明背景),就像下面左边的黑色心形。我如何在iOS 7或更高的系统中,根据iOS 7+导航栏图标中使用的色调方法,以编程方式更改此图像的色调颜色?
这个方法也适用于WatchKit的Apple Watch应用程序吗?
当前回答
斯威夫特5
重绘图像的背景和填充颜色
extension UIImage {
func withBackground(color: UIColor, fill fillColor: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(size, true, scale)
guard let ctx = UIGraphicsGetCurrentContext(), let image = cgImage else { return self }
defer { UIGraphicsEndImageContext() }
ctx.concatenate(CGAffineTransform(a: 1, b: 0, c: 0, d: -1, tx: 0, ty: size.height))
let rect = CGRect(origin: .zero, size: size)
// draw background
ctx.setFillColor(color.cgColor)
ctx.fill(rect)
// draw image with fill color
ctx.clip(to: rect, mask: image)
ctx.setFillColor(fillColor.cgColor)
ctx.fill(rect)
return UIGraphicsGetImageFromCurrentImageContext() ?? self
}
}
其他回答
试试这个
http://robots.thoughtbot.com/designing-for-ios-blending-modes
or
- (void)viewDidLoad
{
[super viewDidLoad];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 50)];
label.numberOfLines = 0;
label.font = [UIFont systemFontOfSize:13];
label.text = @"These checkmarks use the same gray checkmark image with a tintColor applied to the image view";
[self.view addSubview:label];
[self _createImageViewAtY:100 color:[UIColor purpleColor]];
}
- (void)_createImageViewAtY:(int)y color:(UIColor *)color {
UIImage *image = [[UIImage imageNamed:@"gray checkmark.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
CGRect frame = imageView.frame;
frame.origin.x = 100;
frame.origin.y = y;
imageView.frame = frame;
if (color)
imageView.tintColor = color;
[self.view addSubview:imageView];
}
子类,也可以从代码和接口生成器中使用:
@implementation TintedImageView
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self setup];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self setup];
}
return self;
}
-(void)setup {
self.image = [self.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
}
@end
iOS
解决方案从接口生成器,设置templateImage参数在keyPath和选择您的色调颜色从IB
extension UIImageView {
// make template image with tint color
var templateImage: Bool {
set {
if newValue, let image = self.image {
let newImage = image.withRenderingMode(.alwaysTemplate)
self.image = newImage
}
} get {
return false
}
}
}
profileImageView。image = theImageView.image!.withRenderingMode(.alwaysTemplate) profileImageView。tintColor = uiccolor .green
OR
首先在图像资产中选择特定图像,然后选择红色作为模板而不是默认,然后写行。 profileImageView。tintColor = uiccolor .green
Swift 3版本的扩展答案从模糊
func imageWithColor(color: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
color.setFill()
let context = UIGraphicsGetCurrentContext()! as CGContext
context.translateBy(x: 0, y: self.size.height)
context.scaleBy(x: 1.0, y: -1.0);
context.setBlendMode(.normal)
let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height) as CGRect
context.clip(to: rect, mask: self.cgImage!)
context.fill(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()! as UIImage
UIGraphicsEndImageContext()
return newImage
}