The usage of block in OC as the method parameter, and the usage of the ocblock Parameter

The usage of block in OC as the method parameter, and the usage of the ocblock Parameter

Method 1: directly declare the block callback method when passing parameters.

1. Definition method:

-(Int) doTest :( NSString *) name success :( int (^) (int param1, int param2) success para1 :( int) temp1 para2 :( int) temp2

{

Int ret = success (temp1, temp2 );

NSLog (@ "---- % @ -- % d --", name, ret );

Return ret;

}

2. Call method:

[Self doTest: @ "Tom" success: ^ int (int param1, int param2) {// when doTest is called, this red block will be called immediately in doTest (see the blue code above ).

Return param1 + param2;

} Para1: 8 para2: 15];

 

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Method 2: Use typedef to define a block alias. Use the alias to declare that the parameter is of the block type.

1. Declare the type of a block method:

Typedef int (^ myBlock) (int param1, int param2 );

 

2. Definition method:

-(Int) doTest :( NSString *) name success :( myBlock) success para1 :( int) temp1 para2 :( int) temp2

{

Int ret = success (temp1, temp2 );

NSLog (@ "---- % @ -- % d --", name, ret );

Return ret;

}

3. Call method:

[Self doTest: @ "Tom" success: ^ int (int param1, int param2 ){

Return param1 + param2;

} Para1: 8 para2: 15];