导航按钮

#pragma mark - 导航左键＝＝返回

-(void)setLeftButtonWithTitle {
#if 01
UIButton* leftBtn= [UIButton buttonWithType:UIButtonTypeCustom];
[leftBtn setTitle:@"取消" forState:UIControlStateNormal];
leftBtn.frame = CGRectMake(0, 0, 40, 25);
[leftBtn.titleLabel setFont:FONT_SYSTEM(14)];

UIBarButtonItem* leftBtnItem = [[UIBarButtonItem alloc]initWithCustomView:leftBtn];
[leftBtn addTarget:self action:@selector(leftButtonClick) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = leftBtnItem;
#else
UIBarButtonItem *item = [[UIBarButtonItem alloc]initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(leftButtonClick)];
self.navigationItem.leftBarButtonItem = item;
self.navigationItem.leftBarButtonItem.tintColor = [UIColor whiteColor];
#endif
}