IOS项目中的细节处理，如更改状态栏等等

一，状态栏更改为白色

1 在info.plist中添加一个字段：view controller -base status bar 为NO



2 在需要改变状态栏颜色的ViewController中在ViewDidLoad方法中增加：
[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

如果需要在全部View中都变色，可以写在父类的相关方法中，或者写到AppDelegate中。

二 ：去除navigationbar 底部黑线 ——亲测可用

if ([self.navigationController.navigationBar respondsToSelector:@selector( setBackgroundImage:forBarMetrics:)]){

NSArray *list=self.navigationController.navigationBar.subviews;

for (id obj in list) {

if ([obj isKindOfClass:[UIImageView class]]) {

UIImageView *imageView=(UIImageView *)obj;

NSArray *list2=imageView.subviews;

for (id obj2 in list2) {

if ([obj2 isKindOfClass:[UIImageView class]]) {

UIImageView *imageView2=(UIImageView *)obj2;

imageView2.hidden=YES;

}

}

}

}

}

三：
何时使用imageNamed方法

1、采用imageNamed方法的图片加载情况

图片资源反复使用到，如按钮背景图片的蓝色背景，这些图片要经常用到，而且占用内存少

2、不应该采用的情况：

（1）图片一般只使用一次，如一些用户的照片资源

（2）图片资源较大，加载到内存后，比较耗费内存资源

四 Unix时间转换

NSNumber  *dateStr = [data valueForKey:@"lastLogTime"];

double unixTimeStamp = [dateStr doubleValue];
NSTimeInterval _interval=unixTimeStamp;
NSDate *date = [NSDate dateWithTimeIntervalSince1970:_interval];
NSDateFormatter *_formatter=[[NSDateFormatter alloc]init];
[_formatter setLocale:[NSLocale currentLocale]];
[_formatter setDateFormat:@"dd.MM.yyyy"];
NSString *_date=[_formatter stringFromDate:date];

或者：

[obj printAllPropertys];
nameLabel.text = [obj valueForKey:@"empName"];
orgLabel.text = [obj valueForKey:@"orgName"];
positionLabel.text = [obj valueForKey:@"position"];
cellPhoneLabel.text = [obj valueForKey:@"cellphone"];

NSString  *dateNumber = [obj valueForKey:@"lastLogTime"];
NSLog(@"dateNumber%@",dateNumber);

NSDateFormatter *dateFormatter=[[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"yyyy/mm/dd   hh:mm:ss"];
NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
[dateFormatter setTimeZone:timeZone];
//[dateFormatter setLocale:[NSLocale currentLocale]];

double unixTimeStamp = [dateNumber doubleValue];
NSTimeInterval _interval=unixTimeStamp;
NSDate *date = [NSDate dateWithTimeIntervalSince1970:_interval];
timeStr=[dateFormatter stringFromDate:date];
NSLog(@"loginTime:%@,_interval:%@",timeStr,dateNumber);

　　

五，ios获取app版本号和项目名称

NSString *executableFile = [[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleExecutableKey];    //获取项目名称
NSString *version =  [[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString*)kCFBundleVersionKey]; //获取项目版本号

　

浅谈IOS版本号：http://segmentfault.com/a/1190000002423661

NSString *deviceID  = (NSString*) [[UIDevice currentDevice] identifierForVendor];//设备id
// NSString *deviceID   =   ［UIApplication sharedApplication] uuid];
NSString *systemVersion   =  [[UIDevice currentDevice] systemVersion];//系统版本
NSString *systemModel    =  [[UIDevice currentDevice] model];//是iphone 还是 ipad
NSDictionary *dic    =   [[NSBundle mainBundle] infoDictionary];//获取info－plist
NSString *appName  =   [dic objectForKey:@"CFBundleIdentifier"];//获取Bundle identifier
NSString *appVersion   =   [dic valueForKey:@"CFBundleVersion"];//获取Bundle Version
NSDictionary *userInfo = [[NSDictionary alloc] initWithObjectsAndKeys:
deviceID, @"deviceID",
systemVersion, @"systemVersion",
systemModel, @"systemModel",
appName, @"appName",
appVersion, @"appVersion",nil];

NSLog(@"dic:%@",userInfo);

　

六，修改SearchBar的取消按钮的字体

///#begin
//
//功能描述：修改SearchBar的Cancel Button 的Title
// 注意点：
// 使用iOS8 SDK ，本次 UISearchBar适用于iOS7(+)版本，如果想要适配iOS6，则需要对应适配iOS6.
// 例如：
// iOS7+ : for(id cc in [searchBar.subviews[0] subviews]){}
// iOS7- : for(id cc in [searchBar subviews]){}
//
///#end

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
for(id cc in [searchBar.subviews[0] subviews])
{
if([cc isKindOfClass:[UIButton class]])
{
UIButton *btn = (UIButton *)cc;
[btn setTitle:[AppLanguageProcess getLanguageWithKey:@"TEXT_CANCEL"] forState:UIControlStateNormal];
[btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
}
}
} 　　

待续