When the ARC project introduces non-arc, the __unsafe_unretained appears

 when the ARC project introduces non-arc, the __unsafe_unretained appearsCategory: Object-c2013-03-25 10:43 3816 People read comments (0) favorite reports

@interface Mdspreadview:uiscrollview {

@private

ID <MDSpreadViewDataSource> _datasource;

}

@property (nonatomic, assign) Iboutlet ID <MDSpreadViewDataSource> dataSource;

The above section appears at compile time existing instance variable ' _datasource ' for property ' DataSource ' with assign attribute must be __unsafe_unret ained

Change the previous paragraph to

@interface Mdspreadview:uiscrollview {

@private

ID <mdspreadviewdatasource>__unsafe_unretained _datasource;

}

@property (unsafe_unretained) iboutlet ID <MDSpreadViewDataSource> dataSource;

The problem will be solved.

When the ARC project introduces non-arc, the __unsafe_unretained appears