ios - UISegmentedControl 图像突出显示 iOS 中的错误？

Question

我有一个应用程序，我想在其中使用 Instagram 中的按钮自定义分段控件。我曾经这样做过

 [[UISegmentedControl appearanceWhenContainedIn:[UISearchBar class], nil] setSegmentedControlStyle:UISegmentedControlStyleBar];
 [[UISegmentedControl appearanceWhenContainedIn:[UISearchBar class], nil] setTintColor:[UIColor clearColor]];

 [[UISegmentedControl appearance] setBackgroundImage:[UIImage imageNamed:@"back_bg.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
 [[UISegmentedControl appearance] setBackgroundImage:[UIImage imageNamed:@"white_btn.png"]

                   forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];

 [[UISegmentedControl appearance] setDividerImage:[UIImage imageNamed:@"segcontrol_uns-sel.png"]
                                     forLeftSegmentState:UIControlStateNormal
                                       rightSegmentState:UIControlStateSelected
                                              barMetrics:UIBarMetricsDefault];
 [[UISegmentedControl appearance] setDividerImage:[UIImage imageNamed:@"segcontrol_sel-uns.png"]
                                     forLeftSegmentState:UIControlStateSelected
                                       rightSegmentState:UIControlStateNormal
                                              barMetrics:UIBarMetricsDefault];

但是当我选择按钮时，它会突出显示除分区图像之外的部分。所以它看起来有线。有人可以帮我解决这个问题吗？

Answer 1

试试这个:

UIImage *defaultBgImage,*selectedBgImage,*segcontrol_uns,*segcontrol_sel;

if ([UIImage instancesRespondToSelector:@selector(imageWithRenderingMode:)]) 
{
    defaultBgImage = [[UIImage imageNamed:@"back_bg.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    selectedBgImage = [[UIImage imageNamed:@"white_btn.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    segcontrol_uns = [[UIImage imageNamed:@"segcontrol_uns-sel.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    segcontrol_sel = [[UIImage imageNamed:@"segcontrol_sel-uns.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
}
else
{
    defaultBgImage = [UIImage imageNamed:@"back_bg.png"];
    selectedBgImage = [UIImage imageNamed:@"white_btn.png"];
    segcontrol_uns = [UIImage imageNamed:@"segcontrol_uns-sel.png"];
    segcontrol_sel = [UIImage imageNamed:@"segcontrol_sel-uns.png"];
}

[[UISegmentedControl appearance] setBackgroundImage:defaultBgImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

[[UISegmentedControl appearance] setBackgroundImage:selectedBgImage
forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];

 [[UISegmentedControl appearance] setDividerImage:segcontrol_uns forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateSelected
  barMetrics:UIBarMetricsDefault];

 [[UISegmentedControl appearance] setDividerImage:segcontrol_sel forLeftSegmentState: UIControlStateSelected rightSegmentState:UIControlStateNormal
  barMetrics:UIBarMetricsDefault];