AutoreleasePool
__weak NSString *string_weak_ = nil;
- (void)viewDidLoad {
[super viewDidLoad];
// 场景 1
NSString *string = [NSString stringWithFormat:@"leichunfeng"];
string_weak_ = string;
// 场景 2
// @autoreleasepool {
// NSString *string = [NSString stringWithFormat:@"leichunfeng"];
// string_weak_ = string;
// }
// 场景 3
// NSString *string = nil;
// @autoreleasepool {
// string = [NSString stringWithFormat:@"leichunfeng"];
// string_weak_ = string;
// }
NSLog(@"string: %@", string_weak_);
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
NSLog(@"string: %@", string_weak_);
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
NSLog(@"string: %@", string_weak_);
}