如何获取 navigationbar的 size

1.Label属性设置

titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 44)];

titleLabel.backgroundColor = [UIColor clearColor];//设置Label背景透明

titleLabel.font = [UIFont boldSystemFontOfSize:20];

titleLabel.textColor = [UIColor colorWithRed:0.0/255.0 green:255.0/255.0 blue:0.0/255.0 alpha:1];

titleLabel.textAlignment = UITextAlignmentCenter;

titleLabel.text = @"自定义标题";

2.button属性设置

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

[button setTitle:@"Button" forState:UIControlStateNormal];

[button sizeToFit];

3.在navigationItem中添加Label

self.navigationItem.titleView = self.titleLabel;

4.创建一个UIBarButtonItem用的方法主要有：

[UIBarButtonItem alloc]initWithTitle:(NSString *) style:(UIBarButtonItemStyle) target:(id) action:(SEL)

[UIBarButtonItem alloc]initWithBarButtonSystemItem:(UIBarButtonSystemItem) target:(id) action:(SEL)

1.Label属性设置

titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 44)];

titleLabel.backgroundColor = [UIColor clearColor];//设置Label背景透明

titleLabel.font = [UIFont boldSystemFontOfSize:20];

titleLabel.textColor = [UIColor colorWithRed:0.0/255.0 green:255.0/255.0 blue:0.0/255.0 alpha:1];

titleLabel.textAlignment = UITextAlignmentCenter;

titleLabel.text = @"自定义标题";

2.button属性设置

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

[button setTitle:@"Button" forState:UIControlStateNormal];

[button sizeToFit];

3.在navigationItem中添加Label

self.navigationItem.titleView = self.titleLabel;

4.创建一个UIBarButtonItem用的方法主要有：

[UIBarButtonItem alloc]initWithTitle:(NSString *) style:(UIBarButtonItemStyle) target:(id) action:(SEL)

[UIBarButtonItem alloc]initWithBarButtonSystemItem:(UIBarButtonSystemItem) target:(id) action:(SEL)

5.在navigationItem中添加多个右按钮

定义一组button，将buttons放入array，再令rightBarButtonItems(注意有s) = array。

UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:nil];

UIBarButtonItem *button2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:nil];

UIBarButtonItem *button3 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:nil];

UIBarButtonItem *button4 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:nil];

NSArray *array = [[NSArray alloc] initWithObjects:button1,button2,button3,button4, nil];

self.navigationItem.rightBarButtonItems = array;

6.设置NavigationBar背景颜色

self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:218/255 green:222/255 blue:250/255 alpha:1];

7.设置NavigationBar背景图片

UIImage *title_bg = [UIImage imageNamed:@"title_bg"]; //获取图片

CGSize titleSize = self.navigationController.navigationBar.bounds.size; //获取NavigationBar的位置和大小

title_bg = [self scaleToSize: title_bg size:titleSize];

//设置图片大小与NavigationBar相同

[self.navigationController.navigationBar setBackgroundImage:title_bg forBarMetrics:UIBarMetricsDefault];

//设置背景

//用于调整图片大小的方法

-(UIImage *) scaleToSize: (UIImage *) img size:(CGSize) size{

UIGraphicsBeginImageContext(size);

[img drawInRect:CGRectMake(0, 0, size.width, size.height)];

UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return scaledImage;

}

5.在navigationItem中添加多个右按钮

定义一组button，将buttons放入array，再令rightBarButtonItems(注意有s) = array。

UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:nil];

UIBarButtonItem *button2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:nil];

UIBarButtonItem *button3 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:nil];

UIBarButtonItem *button4 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:nil];

NSArray *array = [[NSArray alloc] initWithObjects:button1,button2,button3,button4, nil];

self.navigationItem.rightBarButtonItems = array;

6.设置NavigationBar背景颜色

self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:218/255 green:222/255 blue:250/255 alpha:1];

7.设置NavigationBar背景图片

UIImage *title_bg = [UIImage imageNamed:@"title_bg"]; //获取图片

CGSize titleSize = self.navigationController.navigationBar.bounds.size; //获取NavigationBar的位置和大小

title_bg = [self scaleToSize: title_bg size:titleSize];

//设置图片大小与NavigationBar相同

[self.navigationController.navigationBar setBackgroundImage:title_bg forBarMetrics:UIBarMetricsDefault];

//设置背景

//用于调整图片大小的方法

-(UIImage *) scaleToSize: (UIImage *) img size:(CGSize) size{

UIGraphicsBeginImageContext(size);

[img drawInRect:CGRectMake(0, 0, size.width, size.height)];

UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return scaledImage;

}