桥接的三种方式

// 桥接方式一：手动管理内存
NSString *firstNameStr = (__bridge NSString *)(firstName);
NSString *lastNameStr = (__bridge NSString *)(lastName);
NSLog(@"firstName: %@
lastName: %@",firstNameStr,lastNameStr);
CFRelease(firstName);
 CFRelease(lastName);
// 桥接方式二: 2.1不需要手动管理内存
NSString *firstNameStr = CFBridgingRelease(firstName);
NSString *lastNameStr = CFBridgingRelease(lastName);
NSLog(@"firstName: %@
lastName: %@",firstNameStr,lastNameStr);
// 2.2将对象的所有权转换
NSString *firstNameStr = (__bridge_transfer NSString *)firstName;
NSString *lastNameStr = (__bridge_transfer NSString *)lastName;
NSLog(@"firstName: %@
lastName: %@",firstNameStr,lastNameStr);
// 桥接方式三: Foundation 转换为CoreFoundation
不常用
 (__bridge_retained <#CF type#>)<#expression#>)

最后

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