導航欄中的左欄按鈕項目

Question

在iOS5中，我們將leftBarButtonItems設置為導航欄，如何在iOS 5之前執行此操作？ 我基本上有一個UIBarButtonItem數組，我想把它設置為。

Answer 1

您可以構建自己的欄，並將其添加為左鍵：

    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;

UIToolbarTransparent

。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

Answer 2

samfisher是對的，但您可以使用包含UIButtons的自定義UIView，而不是將UIView用作（單個）leftBasButtonItem