iOS中Navigation中添加自訂Button等UIView

內容其實很簡單，只是有時候忘記了；在我們設定rightBarButton/leftBarbutton有時候發現系統的並不好看，想自訂，於是就是有這種想法了：

直接上代碼，如下

NSInteger width = [[UIScreen mainScreen]bounds].size.width - 20;　　//擷取系統的width
UIView *view_title = [[UIView alloc]initWithFrame:CGRectMake(width, 10, 20, 20)]; //產生自訂UIViewUIButton *btnItem = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 20, 20)];UIImage *image = [UIImage imageNamed:@"down.png"];[btnItem setImage:image forState:UIControlStateNormal];[btnItem addTarget:self action:@selector(favoriteBtnItem) forControlEvents:UIControlEventTouchUpInside];        
[view_title addSubview:btnItem];

//將UIView添加到UIBarBtn中

UIBarButtonItem *btn =[[UIBarButtonItem alloc]initWithCustomView:view_title];

//設定成右邊按鈕位置self.navigationItem.rightBarButtonItem = btn;