突然發(fā)現(xiàn)自定義完 leftBarButtonItem 然后自定義titleView，titleView往右偏移

究其原因是因?yàn)?設(shè)置titleview之前，先初始化leftBarButtonItem和rightBarButtonItem的位置，然后根據(jù)leftBarButtonItem和rightBarButtonItem的位置來(lái)使titleview居中。

//必須放在 leftBarButtonItem和rightBarButtonItem初始化之后調(diào)用

廢話(huà)不說(shuō) 上代碼

CGRect leftViewbounds = self.navigationItem.leftBarButtonItem.customView.bounds;

CGRect rightViewbounds = self.navigationItem.rightBarButtonItem.customView.bounds;

CGRect frame;

CGFloat maxWidth = leftViewbounds.size.width > rightViewbounds.size.width ? leftViewbounds.size.width : rightViewbounds.size.width;

maxWidth += 15;//leftview 左右都有間隙，左邊是5像素，右邊是8像素，加2個(gè)像素的閥值 5 ＋ 8 ＋ 2

frame = self.titleLabel.frame;

frame.size.width = SWIDTH - maxWidth * 2;

self.titleLabel.frame = frame;

self.navigationItem.titleView = self.titleLabel;