很多开发者会在 iPhone 软件里用到手机上经典的九宫格界面，本段实现九宫格的代码由 CocoaChina 会员“花太香齐” 分享，博客原文地址/iphone-nine-box/
核心就这2个方法:
//Power by
- (void)viewDidLoad {
[super viewDidLoad];
NSArray* imageNames = [NSArray arrayWithObjects
@"ico_mobile.png",
@"ico_idcard.png",
@"ico_postcode.png",
@"ico_flight.png",
@"ico_translate.png",
@"ico_phone.png",
@"ico_car.png",
@"ico_health.png",
@"ico_bjxm.png", nil];
UIButton *Btn;
for (int i=0; i<9; i++) {
CGRect frame;
Btn = [[UIButton buttonWithType:UIButtonTypeCustom] retain];
[Btn setImage:[UIImage imageNamed:[imageNames objectAtIndex: i]] forState:UIControlStateNormal];//设置按钮图片
Btn.tag = i;
frame.size.width = 59;//设置按钮坐标及大小
frame.size.height = 75;
frame.origin.x = (i%3)*(59+32)+40;
frame.origin.y = floor(i/3)*(75+24)+40;
[Btn setFrame:frame];
[Btn setBackgroundColor:[UIColor clearColor]];
[Btn addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:Btn];
[Btn release];
}
}
//响应按钮事件
-(void)btnPressed:(id)sender{
UIButton *Btn = (UIButton *)sender;
int index = Btn.tag;
switch (index) {
case 0:
if(mobileController==nil)
mobileController = [[MobileController alloc]init];
[self.navigationController pushViewController:mobileController animated:YES];
break;
//其他几个控制器类似
}
}
九宫格背景修改可以这样实现:
- (void)loadView {
UIImageView *contentView = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
[contentView setImage:[UIImage imageNamed:@"subview_9_bg.png"]];
[contentView setUserInteractionEnabled:YES];
self.view = contentView;
[contentView release];
}
UINavigationBar背景图片可以这样实现:
@implementation UINavigationBar (CustomImage)
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed: @"top_bg.png"]
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
@end
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