iOS: Style导航栏上的左键

Question

所以我一直在尝试样式导航栏上的左栏按钮。主要是我不想取消样式的按钮样式(与设置为custom的UIButton样式相同的样式)。

有人知道怎么做吗?谢谢你！詹姆斯。

Answer 1

看看JASidePanelController.m中的这个函数

+ (UIImage *)defaultImage {
    static UIImage *defaultImage = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        UIGraphicsBeginImageContextWithOptions(CGSizeMake(20.f, 13.f), NO, 0.0f);
        [[UIColor blackColor] setFill];
        [[UIBezierPath bezierPathWithRect:CGRectMake(0, 0, 20, 1)] fill];
        [[UIBezierPath bezierPathWithRect:CGRectMake(0, 5, 20, 1)] fill];
        [[UIBezierPath bezierPathWithRect:CGRectMake(0, 10, 20, 1)] fill];
        [[UIColor whiteColor] setFill];
        [[UIBezierPath bezierPathWithRect:CGRectMake(0, 1, 20, 2)] fill];
        [[UIBezierPath bezierPathWithRect:CGRectMake(0, 6,  20, 2)] fill];
        [[UIBezierPath bezierPathWithRect:CGRectMake(0, 11, 20, 2)] fill];   
        defaultImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
    });
    return defaultImage;
}

这是customButton上的3行代码。

它被这样调用:

- (UIBarButtonItem *)leftButtonForCenterPanel {
    return [[UIBarButtonItem alloc] initWithImage:[[self class] defaultImage] style:UIBarButtonItemStylePlain target:self action:@selector(toggleLeftPanel:)];
}

可以自定义，例如:

- (UIBarButtonItem *)leftButtonForCenterPanel {
UIImage *faceImage = [UIImage imageNamed:@"facebook.png"];
UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];
face.bounds = CGRectMake( 0, 0, faceImage.size.width, faceImage.size.height );
[face setImage:faceImage forState:UIControlStateNormal];
[face addTarget:self 
             action:@selector(toggleLeftPanel:) 
   forControlEvents:UIControlEventTouchUpInside];
return [[UIBarButtonItem alloc] initWithCustomView:face];
}

请根据您的情况修改。