IOS － 代碼片段
編輯：IOS開發綜合
一些代碼片段
1. 16進制顏色值的轉換
#define
UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue &
0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00)
>> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
2.md5
+ (NSString*)md5:(NSString*)str
{
constchar*cStr = [str UTF8String];
unsignedcharresult[16];
CC_MD5(cStr, strlen(cStr), result);
return[NSStringstringWithFormat:@"XXXXXXXXXXXXXXXX",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
3.調用
//1、調用 自帶mail
[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"mailto://[email protected]"]];
//2、調用 電話phone
[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"tel://8008808888"]];
//3、調用 SMS
[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"sms://800888"]];
//4、調用自帶 浏覽器 safari
[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"http://www.hzlzh.com"]];
//調用phone可以傳遞號碼，調用SMS 只能設定號碼，不能初始化SMS內容。
4.計算2個經緯度之間距離
+(double)distanceBetweenOrderBy:(double)lat1:(double)lat2:(double)lng1:(double)lng2{
CLLocation* curLocation = [[CLLocationalloc]initWithLatitude:lat1longitude:lng1];
CLLocation* otherLocation = [[CLLocationalloc]initWithLatitude:lat2longitude:lng2];
doubledistance = [curLocation distanceFromLocation:otherLocation];
returndistance;
}
5.輸入框中是否有個叉號，在什麼時候顯示，用於一次性刪除輸入框中的內容
text.clearButtonMode=UITextFieldViewModeAlways;
6.iOS本地推送
第一步：創建本地推送
// 創建一個本地推送
UILocalNotification*notification = [[[UILocalNotificationalloc]init]autorelease];
//設置10秒之後
NSDate*pushDate = [NSDatedateWithTimeIntervalSinceNow:10];
if(notification != nil) {
// 設置推送時間
notification.fireDate= pushDate;
// 設置時區
notification.timeZone= [NSTimeZonedefaultTimeZone];
// 設置重復間隔
notification.repeatInterval= kCFCalendarUnitDay;
// 推送聲音
notification.soundName= UILocalNotificationDefaultSoundName;
// 推送內容
notification.alertBody= @"推送內容";
//顯示在icon上的紅色圈中的數子
notification.applicationIconBadgeNumber= 1;
//設置userinfo 方便在之後需要撤銷的時候使用
NSDictionary*info = [NSDictionarydictionaryWithObject:@"name"forKey:@"key"];
notification.userInfo= info;
//添加推送到UIApplication
UIApplication*app = [UIApplicationsharedApplication];
[appscheduleLocalNotification:notification];
}
第二步：接收本地推送
- (void)application:(UIApplication*)application didReceiveLocalNotification:(UILocalNotification*)notification{
UIAlertView*alert = [[UIAlertViewalloc]initWithTitle:@"iWeibo"message:notification.alertBodydelegate:nilcancelButtonTitle:@"確定"otherButtonTitles:nil];
[alertshow];
// 圖標上的數字減1
application.applicationIconBadgeNumber-= 1;
}
第三步：解除本地推送
// 獲得 UIApplication
UIApplication*app = [UIApplicationsharedApplication];
//獲取本地推送數組
NSArray*localArray = [app scheduledLocalNotifications];
//聲明本地通知對象
UILocalNotification*localNotification;
if(localArray) {
for(UILocalNotification*noti inlocalArray) {
NSDictionary*dict = noti.userInfo;
if(dict) {
NSString*inKey = [dict objectForKey:@"key"];
if([inKey isEqualToString:@"對應的key值"]) {
if(localNotification){
[localNotificationrelease];
localNotification = nil;
}
localNotification = [noti retain];
break;
}
}
}
//判斷是否找到已經存在的相同key的推送
if(!localNotification) {
//不存在初始化
localNotification = [[UILocalNotificationalloc]init];
}
if(localNotification) {
//不推送 取消推送
[appcancelLocalNotification:localNotification];
[localNotificationrelease];
return;
}
}
7.點擊鏈接直接跳轉到 App Store 指定應用下載頁面
//跳轉到應用頁面
NSString*str = [NSStringstringWithFormat:@"http://itunes.apple.com/us/app/id%d",appid];
[[UIApplicationsharedApplication]openURL:[NSURLurlWithString:str]];
//跳轉到評價頁面
NSString*str = [NSStringstringWithFormat:@"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id;=%d",
appid ];
[[UIApplicationsharedApplication]openURL:[NSURLurlWithString:str]];
8.父級view 不響應touch事件 子view相應事件
-(id)hitTest:(CGPoint)pointwithEvent:(UIEvent*)event {
idhitView = [superhitTest:pointwithEvent:event];
if(hitView == self)returnnil;
elsereturn hitView;
}
9.給視圖加上倒影效果
constCGFloat kReflectPercent = -0.25f;
constCGFloat kReflectOpacity = 0.3f;
constCGFloat kReflectDistance = 10.0f;
+ (void)addSimpleReflectionToView: (UIView*) theView
{
CALayer*reflectionLayer = [CALayerlayer];
reflectionLayer.contents= [theView layer].contents;
reflectionLayer.opacity= kReflectOpacity;
reflectionLayer.frame= CGRectMake(0.0f,0.0f,
theView.frame.size.width,
theView.frame.size.height* kReflectPercent);
CATransform3Dstransform = CATransform3DMakeScale(1.0f, -1.0f,1.0f);
CATransform3Dtransform = CATransform3DTranslate(stransform,0.0f,
-(kReflectDistance + theView.frame.size.height),0.0f);
reflectionLayer.transform= transform;
reflectionLayer.sublayerTransform= reflectionLayer.transform;
[[theViewlayer]addSublayer:reflectionLayer];
}
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