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我試圖創建以編程方式使用UINavigationItem setLeftBarButtonItem和setRightBarButtonItem將留在導航欄右側的UIBarButtonItem
我想有NavigationItem看起來像
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標準導航欄我想在我的圖像（箭頭）和設備邊緣之間保持一個恆定的空間。 我也想在圖像和文本之間有一個恆定的空間。
我創建了一個類別超過的UIBarButtonItem並增加了兩個方法backButtonWith和fwdButtonWith
我讀@Split useful answer解釋瞭如何解決右鍵
button.titleEdgeInsets = UIEdgeInsetsMake(0, - button.imageView.frame.size.width, 0, button.imageView.frame.size.width);
button.imageEdgeInsets = UIEdgeInsetsMake(0, button.titleLabel.frame.size.width, 0, -button.titleLabel.frame.size.width);
但我很難解決後退按鈕。
這裏是我的代碼
- (UIBarButtonItem *)buttonWith:(BOOL) directionLeft title:(NSString *)title image:(UIImage *) buttonImage tintColor:(UIColor *)color target:(id)target andAction:(SEL)action{
UIButton *barButton;
barButton = [UIButton buttonWithType:UIButtonTypeCustom];
float buttonWidth = 130.0f;
[barButton setFrame:CGRectMake(0, 0, buttonWidth, 20.5f)];
[barButton setTitle:title forState:UIControlStateNormal];
[barButton setTitleColor:color forState:UIControlStateNormal];
const CGFloat* components = CGColorGetComponents(color.CGColor);
[barButton setTitleColor:[UIColor colorWithRed:components[0] green:components[1] blue:components[2] alpha:0.3f] forState:UIControlStateHighlighted];
UIEdgeInsets titleEdgeInsets;
UIEdgeInsets imageEdgeInsets;
UIImage *image = [self image:buttonImage tintedWithColor:color fraction:0.0];
[barButton setImage:image forState:UIControlStateNormal];
[barButton setImage:[self image:image byApplyingAlpha:0.3] forState:UIControlStateHighlighted];
[barButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
if(directionLeft == YES){
titleEdgeInsets = UIEdgeInsetsMake(0, 0, 0, 0);//THIS PARAMS SHOULD BE CONFIGURED
imageEdgeInsets = UIEdgeInsetsMake(0,0,0,0);
}else{
titleEdgeInsets = UIEdgeInsetsMake(0, -barButton.imageView.frame.size.width, 0, barButton.imageView.frame.size.width);
imageEdgeInsets = UIEdgeInsetsMake(0, barButton.titleLabel.frame.size.width, 0, -barButton.titleLabel.frame.size.width);
}
barButton.imageEdgeInsets = imageEdgeInsets;
barButton.titleEdgeInsets = titleEdgeInsets;
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:barButton];
return barButtonItem;
}