iOS11 自定义UIBarButtonItem显示异常解决方案

最新推荐文章于 2018-10-30 07:31:45 发布

原创最新推荐文章于 2018-10-30 07:31:45 发布 · 2.8k 阅读

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本文探讨了在iOS11中遇到自定义UIBarButtonItem加载网络图片时出现的显示异常情况，对比了iOS11之前版本的正常表现，并提供了相应的解决方案。

使用button加载网络图片显示异常
iOS11之前正常：

    self.leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.leftButton addTarget:self action:@selector(leftDrawerButtonPress:) forControlEvents:UIControlEventTouchUpInside];
    self.leftButton.frame = RECT(0, 0, 36, 36);
    self.leftButton.clipsToBounds = YES;
    self.leftButton.layer.cornerRadius = 16;
    self.leftButton.layer.borderColor = RGBAHex(0xffffff,0.5).CGColor;
    self.leftButton.layer.borderWidth = 1;
    self.leftButton.adjustsImageWhenHighlighted = NO;
    UIBarButtonItem * leftDrawerButton = [[UIBarButtonItem alloc] initWithCustomView:self.leftButton];
    [self.navigationItem setLeftBarButtonItem:leftDrawerButton animated:YES];

iOS11:

    self.leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.leftButton addTarget:self action:@selector(leftDrawerButtonPress:) forControlEvents:UIControlEventTouchUpInside];
    self.leftButton.frame = RECT(0, 0, 36, 36);
    self.leftButton.clipsToBounds = YES;
    self.leftButton.layer.cornerRadius = 16;
    self.leftButton.layer.borderColor = RGBAHex(0xffffff,0.5).CGColor;
    self.leftButton.layer.borderWidth = 1;
    self.leftButton.adjustsImageWhenHighlighted = NO;
    UIBarButtonItem * leftDrawerButton = [[UIBarButtonItem alloc] initWithCustomView:self.leftButton];
    if ([[[UIDevice currentDevice] systemVersion] doubleValue] >= 11.0) {
        [self.leftButton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.size.equalTo(CGSizeMake(36, 36));
        }];
    }
    [self.navigationItem setLeftBarButtonItem:leftDrawerButton animated:YES];