wehub-resource-sync
90 lines
3.7 KiB
Objective-C
90 lines
3.7 KiB
Objective-C
//
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// TLGroup+CreateAvatar.m
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// TLChat
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//
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// Created by 李伯坤 on 2017/9/19.
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// Copyright © 2017年 李伯坤. All rights reserved.
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//
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#import "TLGroup+CreateAvatar.h"
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#import "NSFileManager+TLChat.h"
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#import "TLMacros.h"
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@implementation TLGroup (CreateAvatar)
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- (void)createGroupAvatarWithCompleteAction:(void (^)(NSString *groupID))completeAction
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{
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dispatch_async(dispatch_get_global_queue(0, 0), ^{
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NSInteger usersCount = self.users.count > 9 ? 9 : self.users.count;
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CGFloat viewWidth = 200;
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CGFloat width = viewWidth / 3 * 0.85;
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CGFloat space3 = (viewWidth - width * 3) / 4; // 三张图时的边距（图与图之间的边距）
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CGFloat space2 = (viewWidth - width * 2 + space3) / 2; // 两张图时的边距
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CGFloat space1 = (viewWidth - width) / 2; // 一张图时的边距
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CGFloat y = ({
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int ans = space1;
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if (usersCount > 6) {
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ans = space3;
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}
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else if (usersCount >= 3) {
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ans = space2 - space3;
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}
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ans;
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});
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CGFloat x = ({
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CGFloat ans = space1;
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if (usersCount % 3 == 0) {
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ans = usersCount == 3 ? space1 :space3;
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}
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else if (usersCount % 2 == 0) {
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ans = space2 - space3;
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}
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ans;
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});
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UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, viewWidth, viewWidth)];
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[view setBackgroundColor:[UIColor colorWithWhite:0.8 alpha:0.6]];
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__block NSInteger count = 0; // 下载完成图片计数器
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for (NSInteger i = usersCount - 1; i >= 0; i--) {
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TLUser *user = [self.users objectAtIndex:i];
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UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(x, y, width, width)];
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[view addSubview:imageView];
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[imageView tt_setImageWithURL:user.avatarURL.toURL placeholderImage:[UIImage imageNamed:DEFAULT_AVATAR_PATH] completed:^(UIImage *image, NSError *error, TLImageCacheType cacheType, NSURL *imageURL) {
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count ++;
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if (count == usersCount) { // 图片全部下载完成
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UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 2.0);
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[view.layer renderInContext:UIGraphicsGetCurrentContext()];
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UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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CGImageRef imageRef = image.CGImage;
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CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, CGRectMake(0, 0, view.width * 2, view.height * 2));
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UIImage *ansImage = [[UIImage alloc] initWithCGImage:imageRefRect];
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NSData *imageViewData = UIImagePNGRepresentation(ansImage);
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NSString *savedImagePath = [NSFileManager pathUserAvatar:self.groupAvatarPath];
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[imageViewData writeToFile:savedImagePath atomically:YES];
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CGImageRelease(imageRefRect);
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dispatch_async(dispatch_get_main_queue(), ^{
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if (completeAction) {
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completeAction(self.groupID);
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}
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});
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}
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}];
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if (i % 3 == 0) { // 换行
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y += (width + space3);
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x = space3;
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}
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else if (i == 2 && usersCount == 3) { // 换行，只有三个时
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y += (width + space3);
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x = space2;
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}
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else {
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x += (width + space3);
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}
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}
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});
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}
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@end
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