iOS中常用設定返回按鈕_IOS

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//添加返回按鈕-(void)backBtn{  UIButton *backBtn=[[UIButton alloc]initWithFrame:CGRectMake(0, 10, 60, 20)];  [backBtn setTitle:@"返回" forState:UIControlStateNormal];  backBtn.titleLabel.font=[UIFont systemFontOfSize:12];  backBtn.imageEdgeInsets=UIEdgeInsetsMake(2,2,2,2);  [backBtn setImage:[UIImage imageNamed:@"fanhui"] forState:UIControlStateNormal];  [backBtn addTarget:self action:@selector(backto) forControlEvents:UIControlEventTouchDown];  UIBarButtonItem *leftBtn=[[UIBarButtonItem alloc]initWithCustomView:backBtn];  UIBarButtonItem *flexBtn=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];  flexBtn.width=-10;//正數往左移,負數往右移  self.navigationItem.leftBarButtonItems=@[flexBtn,leftBtn];}//返回按鈕-(void)backto{  [self dismissViewControllerAnimated:YES completion:^{  }];}

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