Transparent UIToolbar

问题:

I wrote the following code to make my toolbar transparent.

[mtoolbar setBackgroundColor:[UIColor clearColor]];

How do I make UIToolbar transparent?

回答1:

You can set the property translucent to YES and see if this helps.

回答2:

[self.toolbar setBackgroundImage:[UIImage new]
              forToolbarPosition:UIToolbarPositionAny
                      barMetrics:UIBarMetricsDefault];

[self.toolbar setBackgroundColor:[UIColor clearColor]];

回答3:

Setting the property translucent to YES will not work in iOS 5 and below. Here's how it can be done without subclassing toolbar:

const float colorMask[6] = {222, 255, 222, 255, 222, 255};
UIImage *img = [[UIImage alloc] init];
UIImage *maskedImage = [UIImage imageWithCGImage: CGImageCreateWithMaskingColors(img.CGImage, colorMask)];

[self.toolbar setBackgroundImage:maskedImage forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];

回答4:

Check the below code

[myToolbar setBarStyle:UIBarStyleBlack];
[myToolbar setTranslucent:YES];

Taken from

@Brandon Bodnár has answered in the below SO post.

Couldn't UIToolBar be transparent?

you could also use the different approach

Transparent UIToolBar

回答5:

for (UIView * sv in [toolBar subviews])
{
     [sv removeFromSuperview];
}

;) any iOs

回答6:

The following works in iOS 5 (and iOS 6 beta 4, although a slight top shadow is still visible there).

Please note: Making a UIToolbar or UINavigationBar transparent is rarely a good idea, and modifying Apple's UIKit elements in such a way is bound to break sooner or later.

TransparentToolbar.h

#import <UIKit/UIKit.h>

@interface TransparentToolbar : UIToolbar

@end

TransparentToolbar.m

#import "TransparentToolbar.h"

@implementation TransparentToolbar

-(void)insertSubview:(UIView *)view atIndex:(NSInteger)index
{
    //  This method is called with a view of class "UINavigationBarBackground" or "_UIToolbarBackground", respectively. It would be possible to check for this with NSStringFromClass([view class]) to be completely sure that we're skipping the right view.

    if (index != 0)
    {
        [super insertSubview:view atIndex:index];
    }
    else
    {
        // insert your custom background view, if you want to
    }
}


@end

EDIT: In iOS 5+, it's also possible to simply set the backgroundImage (which could be transparent). This is certainly the "cleaner" solution, but is less flexible than a custom UIView.

[someToolbar setBackgroundImage:[UIImage imageNamed:@"clear"] forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];

回答7:

This worked for me for iOS 6 and 7:

UIGraphicsBeginImageContextWithOptions(CGSizeMake(1, 1), NO, 0.0);
UIImage *blank = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

[self.toolBar setBackgroundImage:blank forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];