自定义button页面

#import "City.h"

@implementation City

//构造方法

-(id)initWithFrame:(CGRect)frame{

    self = [super initWithFrame:frame];

    if (self) {

        self.imageView.contentMode = UIViewContentModeScaleAspectFit;

    }

    return self;

}

-(CGRect)titleRectForContentRect:(CGRect)contentRect{

    CGFloat x = 0;

    CGFloat y = 0;

    CGFloat w = 50;

    CGFloat h = 44;

    return CGRectMake(x, y, w, h);

}

-(CGRect)imageRectForContentRect:(CGRect)contentRect{

    CGFloat w = 15;

    CGFloat h = 15;

    CGFloat x = 50;

    CGFloat y = (44-15)/2;

    return CGRectMake(x, y, w, h);

}

@end

另外一个页面导入自定义button的头文件  

City *city = [[City alloc]initWithFrame:CGRectMake(0, 0, 65, 44)];

    [city addTarget:self action:@selector(selectCityAction) forControlEvents:UIControlEventTouchUpInside];

    [city setTitle:@"北京" forState:UIControlStateNormal];

    [city setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

    [city setImage:[UIImage imageNamed:@"arrow.png"] forState:UIControlStateNormal];

    UIBarButtonItem *bbi_selectCity = [[UIBarButtonItem alloc]initWithCustomView:city];

    self.navigationItem.rightBarButtonItem = bbi_selectCity;