navigationbar的一些设置记录

1.设置navigationbar背景颜色

[[UINavigationBar appearance] setBarTintColor:[UIColor blackColor]];

PS:如果颜色不对，可能是因为默认的半透明玻璃效果导致的，要关闭使用

self.navigationController.navigationBar.translucent = NO;

再PS：如果修改了颜色一点反应都没，则需要隐藏/显示

2.设置按钮颜色

self.navigationController.navigationBar.tintColor = [UIColor whiteColor];

3.设置标题颜色及大小

方法1：

UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 144)];

title.text = @"帮助";

title.textAlignment = NSTextAlignmentCenter;

title.textColor = [UIColor whiteColor];

title.font = [UIFont systemFontOfSize:20];

self.navigationItem.titleView = title;

方法2：

[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], UITextAttributeTextColor,[UIColor colorWithRed:0 green:0.7 blue:0.8 alpha:1], UITextAttributeTextShadowColor,[NSValue valueWithUIOffset:UIOffsetMake(0, 0)], UITextAttributeTextShadowOffset,[UIFont fontWithName:@"Arial-Bold" size:0.0],UITextAttributeFont,nil]];

4.navigationbar默认高度为44