iphone - navigationBar 中的左栏按钮项

Question

在 iOS5 中，我们可以将 leftBarButtonItem 设置为导航栏，对于 iOS 5 之前的版本我该如何做？我基本上有一个 UIBarButtonItem 数组，我想将其设置为。

Answer 1

您可以建立自己的栏，并将其添加为左按钮:

    UIBarButtonItem *firstButton = [[UIBarButtonItem alloc] initWithTitle:@"First" style:UIBarButtonItemStyleBordered target:self action:@selector(firstButtonAction:)];
    UIBarButtonItem *secondButton = [[UIBarButtonItem alloc] initWithTitle:@"Second" style:UIBarButtonItemStyleBordered target:self action:@selector(secondButtonAction:)];

    UIToolbarTransparent *toolbar = [UIToolbarTransparent new];

    [toolbar setFrame:CGRectMake(0,0, 140,44)];
    [toolbar setItems:[NSArray arrayWithObjects:firstButton, secondButton, nil]];

    UIBarButtonItem *customBarButton = [[UIBarButtonItem alloc] initWithCustomView:toolbar];
    self.navigationItem.leftBarButtonItem = customBarButton;

UIToolbar透明

.h

#import <Foundation/Foundation.h>

@interface UIToolbarTransparent : UIToolbar {

}

.m

#import "UIToolbarTransparent.h"

@implementation UIToolbarTransparent

- (id)init {
    if (self = [super init]) {
        self.opaque = NO;
        self.backgroundColor = [UIColor clearColor];
        self.translucent=YES;
    }
    return self;
}
@end