IOS 在MRC(非ARC)内存管理方式下，中如果Block调用了self的方法，那self的引用计数会被block +1, 如果处理不当会当值内存泄漏。
@implementation ISSChartLineViewController
– (void)dealloc
{
[_lineViewrelease];
[_changeDataButtonrelease];
[superdealloc];
}
– (void)viewWillAppear:(BOOL)animated
{
[superviewWillAppear:animated];
_lineView = [[ISSChartLineViewlineData:[[ISSChartDataGeneratorsharedInstance]lineData]];
_lineView.didSelectedLines = ^ISSChartHintView *(ISSChartLineView *lineView,NSArray *lines,NSInteger index,ISSChartAxisItem *xAxisItem) {
:lineView lines:lines index:index xAxisItem:xAxisItem];
};
//here need to optimization
[self.viewaddSubview:_lineView];
bringSubviewToFront];
}
如果这样写，回退到上一个界面的时候dealloc方式是不会调用的，，因为self被block应用在，这样会导致self一直放在内存中，修改如下即可:
– (void)viewWillAppear:(BOOL)animated
{
[superviewWillAppear:animated];
_lineView = [[ISSChartLineViewlineData:[[ISSChartDataGeneratorsharedInstance]lineData]];
__blocktypeof(self)weakSelf =self;
_lineView.didSelectedLines = ^ISSChartHintView *(ISSChartLineView *lineView,NSArray *lines,NSInteger index,ISSChartAxisItem *xAxisItem) {
return [weakSelfgetHintView:lineView lines:lines index:index xAxisItem:xAxisItem];
};
//here need to optimization
[self.viewaddSubview:_lineView];
bringSubviewToFront];
}
而做人的能力则会给你一百种机会。
