Solve the problem of customizing the left button of the navigation bar on the right after ios7.0

Resolve ios7.0 After you customize the left button on the navigation bar www.111cn.net edit: Edit02_lz Source: Reprint recently developed an iOS app, in the ios7.0+ appear on the left side of the custom navigation bar button appears on the right, then self-solved, The solution is as follows

1. Custom button

The code is as follows

Copy Code

Left button UIButton *leftbtn = [[UIButton Alloc]initwithframe:rectwithpara (-20, 0, 44, 44)]; [Leftbtn addtarget:self Action: @selector (btnclicked:) forcontrolevents:uicontroleventtouchupinside];//Set Button click event [Leftbtn setbackgroundimage:imagenamed (@ "ic_fanhui_normal.png") forstate:uicontrolstatenormal];//set button normal state picture [Leftbtn setbackgroundimage:imagenamed (@ "ic_fanhui_pressed.png") forstate:uicontrolstateselected];//Settings button Select Picture

2. Initialize Uibarbuttonitem

The code is as follows	Copy Code
Uibarbuttonitem *leftbarbuton = [[Uibarbuttonitem alloc]initwithcustomview:leftbtn];

3. Adjust the position and set the left icon of the navigation bar

The code is as follows

Copy Code

Adjust the position of the leftbarbuttonitem below IOS7 if ([[[[[[Uidevice Currentdevice] systemversion] floatvalue]>=7.0?20:0)) { Uibarbuttonitem *negativespacer = [[Uibarbuttonitem alloc]initwithbarbuttonsystemitem: Uibarbuttonsystemitemfixedspace Target:nil Action:nil]; Negativespacer.width = -20;//This value can be changed freely according to the situation Self.navigationItem.leftBarButtonItems = @[negativespacer, Leftbarbuton]; }else Self.navigationItem.leftBarButtonItem = Leftbarbuton;

Solve the problem of customizing the left button of the navigation bar on the right after ios7.0