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5.轉換證書格式分別將推送證書和證書私鑰導出為p12 5.1. 轉換推送證書為pem格式（推送證書） 5.2.加密轉換（私鑰）轉換私鑰為pem格...
在iOS系統中，系統分配了16byte(16字節)內存空間，可通過malloc_size()函數獲取字節數，class_getInstanceS...
AppDelegate delegate=(AppDelegate)[[UIApplication sharedApplication] del...
(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(...
//后臺定位self.locationManager.showsBackgroundLocationIndicator=YES;
//獲取系統是24小時制或者12小時制NSString *formatStringForHours = [NSDateFormatter dat...
MQTTCFSocketTransport *transport=[[MQTTCFSocketTransport alloc]init];tra...
NSMutableArray *countriesArray = [[NSMutableArray alloc] init];NSLocale ...
必須要這樣寫 才行NSString *tempStr=@"37.3";NSNumber * tempNumber = @([tempStr do...