小编use*_*633的帖子

你能帮我解决这个错误吗？我用ARC和非ARC试过这段代码.用ARC就可以了.但非ARC.我该怎么办？请帮帮我.^ __ ^;

当我按下按钮时,会发生错误.**

#import <UIKit/UIKit.h>
@interface FirstViewController : UIViewController {

    void                    (^_myOne)(void);    
    UIView*                 _viewOne;
}
@property (nonatomic, retain)   void            (^myOne)(void);
@property (nonatomic, retain)   UIView*         viewOne;
- (void)useFirstOne:(void(^)(void))blockOne;
@end
#import "FirstViewController.h"
@implementation FirstViewController
@synthesize myOne = _myOne, viewOne = _viewOne;
- (void)useFirstOne:(void (^)(void))blockOne {

    blockOne ();
}
- (void)buttonPressed {
        [self useFirstOne:self.myOne]; //If I put this line into 'viewDidLoad', has no problem.
}
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor redColor];
    UIButton* buttonA = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    buttonA.frame = CGRectMake(0, …