导航栏自带的按钮,时常不能满足要求,所以深深需要进行各种定制.

写一个UINavigationItem的category

// UINavigationItem+CB_ChangeButton.h


@interface UINavigationItem (CB_ChangeButton)- (void) CB_SetRightButton:(UIButton *)button;- (void) CB_SetLeftButton:(UIButton *)button;- (void) CB_SetNavigationTitle:(NSString *)title;@end


 

//  UINavigationItem+CB_ChangeButton.m





#import "UINavigationItem+CB_ChangeButton.h"@implementation UINavigationItem (CB_ChangeButton)- (void) CB_SetRightButton:(UIButton *)button {        UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithCustomView: button];    self.rightBarButtonItem = rightItem;}- (void) CB_SetLeftButton:(UIButton *)button {        UIBarButtonItem *leftItem = [[UIBarButtonItem alloc] initWithCustomView: button];    self.leftBarButtonItem = leftItem;}- (void) CB_SetNavigationTitle:(NSString *)title {        UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake( 0, 0, 320, 44)];    label.text = title;    label.textColor = [UIColor whiteColor];    label.font = FONT;    label.textAlignment = NSTextAlignmentCenter;    self.titleView = label;}@end