自定義導航按鈕UIBarButtonItem

基本上每一個iOS APP裏面都有導航，好比微信、QQ、支付寶。導航能夠很方便地幫助咱們管理視圖控制器（UIViewController）。導航的重要性不言而喻，基本上是每一位iOS初學者都要接觸到的問題。

iOS系統導航欄中有leftBarButtonItem和rightBarButtonItem，咱們能夠根據本身的需求來自定義這兩個UIBarButtonItem。

 

系統提供了幾種的建立方法

- (instancetype)initWithImage:(UIImage *)image style:(UIBarButtonItemStyle)style target:(id)target action:(SEL)action;

- (instancetype)initWithImage:(UIImage *)image landscapeImagePhone:(UIImage *)landscapeImagePhone style:(UIBarButtonItemStyle)style target:(id)target action:(SEL)action NS_AVAILABLE_IOS(5_0); // landscapeImagePhone will be used for the bar button image when the bar has Compact or Condensed bar metrics.

- (instancetype)initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style target:(id)target action:(SEL)action;

- (instancetype)initWithBarButtonSystemItem:(UIBarButtonSystemItem)systemItem target:(id)target action:(SEL)action;

- (instancetype)initWithCustomView:(UIView *)customView;

 經過系統的建立UIBarButtonItem

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(right:)];

BarButtonSystemItem 點進去看是一個枚舉 在這裏也不過多的介紹了

typedef NS_ENUM(NSInteger, UIBarButtonSystemItem) {

    UIBarButtonSystemItemDone,

    UIBarButtonSystemItemCancel,

    UIBarButtonSystemItemEdit,  

    UIBarButtonSystemItemSave,  

    UIBarButtonSystemItemAdd,

    UIBarButtonSystemItemFlexibleSpace,

    UIBarButtonSystemItemFixedSpace,

    UIBarButtonSystemItemCompose,

    UIBarButtonSystemItemReply,

    UIBarButtonSystemItemAction,

    UIBarButtonSystemItemOrganize,

    UIBarButtonSystemItemBookmarks,

    UIBarButtonSystemItemSearch,

    UIBarButtonSystemItemRefresh,

    UIBarButtonSystemItemStop,

    UIBarButtonSystemItemCamera,

    UIBarButtonSystemItemTrash,

    UIBarButtonSystemItemPlay,

    UIBarButtonSystemItemPause,

    UIBarButtonSystemItemRewind,

    UIBarButtonSystemItemFastForward,

別忘了實現right:方法了

- (void)right:(id)sender {

    

    NSLog(@"點擊了導航欄右邊的按鈕");

}

 自定義文字的UIBarButtonItem

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(right1)];

UIBarButtonItemStyle 有三種樣式

typedef NS_ENUM(NSInteger, UIBarButtonItemStyle) {

    UIBarButtonItemStylePlain,

    UIBarButtonItemStyleBordered NS_ENUM_DEPRECATED_IOS(2_0, 8_0, "Use UIBarButtonItemStylePlain when minimum deployment target is iOS7 or later"),

    UIBarButtonItemStyleDone,

};

自定義圖片

 self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"圖片名"] style:UIBarButtonItemStylePlain target:self action:@selector(right)];

自定義view

UIView *BarbuttonItemView = [[UIView alloc] init];

    

    BarbuttonItemView.frame = CGRectMake(0, 0, 20, 20);

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:BarbuttonItemView];

 

能夠徹底的自定義 寫一個分類

/**

 設置UIBarButtonItem的按鈕

 */

+ (UIBarButtonItem *)itemWithimageNdamed: (NSString *)imageNamed HighlightedimageNamed:(NSString *)HighlightedimageNamed target:(id)target action:(SEL)action;

 

+ (UIBarButtonItem *)itemWithimageNdamed: (NSString *)imageNamed HighlightedimageNamed:(NSString *)HighlightedimageNamed target:(id)target action:(SEL)action {

    

    

    UIButton *button = [[UIButton alloc] init];

    [button setBackgroundImage:[UIImage imageNamed:imageNamed] forState:UIControlStateNormal];

    [button setBackgroundImage:[UIImage imageNamed:HighlightedimageNamed] forState:UIControlStateHighlighted];

    button.size = button.currentBackgroundImage.size;

    

    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

  

    return [[UIBarButtonItem alloc] initWithCustomView:button];

}