136 lines
5.4 KiB
Objective-C
136 lines
5.4 KiB
Objective-C
// Copyright (c) 2024 Tencent. All rights reserved.
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// Author: eddardliu
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#import "TUIMultimediaImageUtil.h"
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@implementation TUIMultimediaImageUtil
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+ (UIImage *)imageFromView:(UIView *)view {
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UIGraphicsBeginImageContext(view.bounds.size);
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CGContextRef ctx = UIGraphicsGetCurrentContext();
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[view.layer renderInContext:ctx];
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UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return img;
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}
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+ (UIImage *)imageFromView:(UIView *)view withRotate:(CGFloat)rotate {
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// view旋转后占用的矩形大小--最终画布大小
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CGSize finalSize = CGSizeMake(CGRectGetWidth(view.frame), CGRectGetHeight(view.frame));
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// view的原始大小
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CGSize originSize = CGSizeMake(CGRectGetWidth(view.bounds), CGRectGetHeight(view.bounds));
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UIGraphicsBeginImageContext(finalSize);
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CGContextRef ctx = UIGraphicsGetCurrentContext();
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// 根据画布大小，先移动到中心点
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CGContextTranslateCTM(ctx, finalSize.width / 2, finalSize.height / 2);
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// 旋转坐标系
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CGContextRotateCTM(ctx, rotate);
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// 根据原始大小确定绘制view的起始位置
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CGContextTranslateCTM(ctx, -originSize.width / 2, -originSize.height / 2);
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[view.layer renderInContext:ctx];
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UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return img;
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}
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+ (UIImage *)simpleImageFromImage:(UIImage *)img withTintColor:(UIColor *)tintColor {
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// We want to keep alpha, set opaque to NO; Use 0.0f for scale to use the scale factor of the
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// device’s main screen.
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UIGraphicsBeginImageContextWithOptions(img.size, NO, 0.0f);
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[tintColor setFill];
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CGRect bounds = CGRectMake(0, 0, img.size.width, img.size.height);
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UIRectFill(bounds);
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// Draw the tinted image in context
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[img drawInRect:bounds blendMode:kCGBlendModeDestinationIn alpha:1.0f];
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UIImage *tintedImage = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return tintedImage;
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}
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+ (UIImage *)imageFromImage:(UIImage *)img withTintColor:(UIColor *)tintColor {
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UIImage *imgWithTintColor = [self simpleImageFromImage:img withTintColor:tintColor];
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if (img.imageAsset == nil) {
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return imgWithTintColor;
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}
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UITraitCollection *const scaleTraitCollection = [UITraitCollection currentTraitCollection];
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UITraitCollection *const darkUnscaledTraitCollection = [UITraitCollection traitCollectionWithUserInterfaceStyle:UIUserInterfaceStyleDark];
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UITraitCollection *const darkScaledTraitCollection =
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[UITraitCollection traitCollectionWithTraitsFromCollections:@[ scaleTraitCollection, darkUnscaledTraitCollection ]];
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UIImage *imageDark = [img.imageAsset imageWithTraitCollection:darkScaledTraitCollection];
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if (img != imageDark) {
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[imgWithTintColor.imageAsset registerImage:[self simpleImageFromImage:imageDark withTintColor:tintColor] withTraitCollection:darkScaledTraitCollection];
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}
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return imgWithTintColor;
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}
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+ (UIImage *)resizeImage:(UIImage *)img toSize:(CGSize)size {
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UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:size];
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return [renderer imageWithActions:^(UIGraphicsImageRendererContext *_Nonnull rendererContext) {
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[img drawInRect:CGRectMake(0, 0, size.width, size.height)];
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}];
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}
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+ (UIImage *)rotateImage:(UIImage *)image angle:(float)angle {
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CGFloat radians = angle * (M_PI / 180.0);
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CGSize size = image.size;
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UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:size];
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UIImage *rotatedImage = [renderer imageWithActions:^(UIGraphicsImageRendererContext *context) {
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CGContextRef cgContext = context.CGContext;
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CGContextTranslateCTM(cgContext, size.width / 2, size.height / 2);
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CGContextRotateCTM(cgContext, radians);
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CGContextTranslateCTM(cgContext, -size.width / 2, -size.height / 2);
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[image drawInRect:CGRectMake(0, 0, size.width, size.height)];
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}];
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return rotatedImage;
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}
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+ (UIImage *)imageWithColor:(UIColor *)color {
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return [self imageWithColor:color size:CGSizeMake(1, 1)];
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}
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+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size {
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UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:size];
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return [renderer imageWithActions:^(UIGraphicsImageRendererContext *_Nonnull rendererContext) {
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[color set];
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[rendererContext fillRect:CGRectMake(0, 0, size.width, size.height)];
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}];
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}
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+ (UIImage *)createBlueCircleWithWhiteBorder : (CGSize)size withColor:(UIColor*) color{
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UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
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CGContextRef context = UIGraphicsGetCurrentContext();
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if (!context) return nil;
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CGContextSetFillColorWithColor(context, [UIColor yellowColor].CGColor);
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CGFloat centerX = size.width / 2;
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CGFloat centerY = size.width / 2;
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CGFloat radius = size.width / 2;
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CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
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CGContextSetLineWidth(context, 0);
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CGContextAddArc(context, centerX, centerY, radius, 0, 2 * M_PI, 0);
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CGContextDrawPath(context, kCGPathFillStroke);
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CGContextSetFillColorWithColor(context, color.CGColor);
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CGContextSetLineWidth(context, 0);
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CGContextAddArc(context, centerX, centerY, 5, 0, 2 * M_PI, 0);
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CGContextDrawPath(context, kCGPathFillStroke);
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UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return image;
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}
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@end
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