强，复制，弱和原子和非原子分配的自定义设置器？

Posted 2023-03-11

【中文标题】强，复制，弱和原子和非原子分配的自定义设置器？

【英文标题】：Custom Setter for Strong, Copy, weak and assign with atomic and nonatomic?

【发布时间】：2016-06-15 04:00:28

【问题描述】：

就像这是非原子的 COPY 的 Setter

@property (copy, nonatomic) NSString *someString;

-(void)setSomeString:(NSString *)someString 
  _someString = someString;
  _someString = [someString copy];

像这样我想知道强、弱和赋值的setter和getter

@property (copy, atomic) NSString *someString; // Setter ?
@property (Strong, nonatomic) NSString *someString;
@property (assign, nonatomic) NSString *someString;
@property (Strong, atomic) NSString *someString;
@property (assign, atomic) NSString *someString;

【参考方案1】：

例如：setter 方法

- (void)setImgView:(UIImageView *)imgView
    if (_imgView == imgView) 
        return;
    
    _imgView = imgView;
    _imgView.layer.borderColor = [UIColor clearColor].CGColor;
    _imgView.layer.borderWidth = 0.0f;
    _imgView.layer.cornerRadius = _imgView.frame.size.width/2;