Pass a value for a single example in iOS

Pass a value for a single example in iOS

To write a class, the function is to pass the value.

# Import

@ Interface singleton: NSObject

+ (Singleton *) parse data;

@ Property (strong, nonatomic) NSString * value;

@ End

# Import "singleton. h"

@ Implementation singleton

Static singleton * singletonData = nil;

+ (Singleton *) Upload data {

Static dispatch_once_t onceToken;

Dispatch_once (& onceToken, ^ {

SingletonData = [[singleton alloc] init];

});

Return singletonData;

}

-(Id) init {

If (self = [super init]) {

}

Return self;

}

@ End

If you want to pass the Value from A to B, you need to assign the Value to the Value.

Singleton * oneS = [singleton upload data];

OneS. value = @ "my name is caomao ";

NSLog (@ "oneS. value ----> % @", oneS. value );

The value has been assigned... In the class that you need, the call is OK. This is in the Class B call.

NSString * strB = [singleton upload data]. value];