iOS 调整导航栏返回按钮的位置

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#pragma mark -创建返回按钮

//1.初始化按钮UIButton

UIButton* leftBtn = [UIButtonbuttonWithType:UIButtonTypeSystem];

//1.2设置位置

leftBtn.frame=CGRectMake(0,0,25,25);

//1.3添加背景颜色

[leftBtnsetBackgroundImage:[UIImageimageNamed:@"icon_back"]forState:UIControlStateNormal];

//1.4监听

[leftBtnaddTarget:selfaction:@selector(leftBarBtnClicked:)forControlEvents:UIControlEventTouchUpInside];

//2初始化按钮UIBarButtonItem

UIBarButtonItem* leftBarBtn = [[UIBarButtonItemalloc]initWithCustomView:leftBtn];

//2.2创建UIBarButtonSystemItemFixedSpace

UIBarButtonItem* spaceItem = [[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpacetarget:nilaction:nil];

//2.3将宽度设为负值

spaceItem.width= -15;

//2.4将两个BarButtonItem都返回给NavigationItem

self.navigationItem.leftBarButtonItems=@[spaceItem,leftBarBtn];

谢谢!!!