详解iOS应用中自定义UIBarButtonItem导航按钮的创建方法

最终效果展示：

就是那个音符图形的旋转。
关键代码展示（已加注释）：

复制代码
//
// ViewController.m
// NavigationBtn
//

 

#import "ViewController.h"
#define DEGREES_TO_RADIANS(angle) ((angle) / 180.0 * M_PI)

///ImageView旋转状态枚举
typedef enum {
RotateStateStop,
RotateStateRunning,
}RotateState;

@interface ViewController ()
{
///旋转角度
CGFloat imageviewAngle;
///旋转ImageView
UIImageView *imageView;
///旋转状态
RotateState rotateState;
}

@end

复制代码
@implementation ViewController

 

- (void)viewDidLoad
{
[super viewDidLoad];
self.title=@"微信公众账号:乐Coding";
[self buildBarButtonItem];
}
#pragma mark 添加 RightBarButtonItem
-(void)buildBarButtonItem{

imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon"]];
imageView.autoresizingMask = UIViewAutoresizingNone;
imageView.contentMode = UIViewContentModeScaleToFill;
imageView.bounds=CGRectMake(0, 0, 40, 40);
//设置视图为圆形
imageView.layer.masksToBounds=YES;
imageView.layer.cornerRadius=20.f;
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0, 0, 40, 40);
[button addSubview:imageView];
[button addTarget:self action:@selector(animate) forControlEvents:UIControlEventTouchUpInside];
imageView.center = button.center;
//设置RightBarButtonItem
UIBarButtonItem *barItem = [[UIBarButtonItem alloc] initWithCustomView:button];