iOS常用的忽略警告类型：

1.方法弃用警告

#pragmaclang diagnostic push

#pragma clang diagnostic ignored "-Wdeprecated-declarations"

//过期的方法

#pragma clang diagnostic pop

2.不兼容指针类型警告

#pragmaclang diagnostic push

#pragmaclang diagnostic ignored  "-Wincompatible-pointer-types"

//不兼容指针类型

#pragmaclang diagnostic pop

3.循环引用警告

#pragmaclang diagnostic push

#pragmaclang diagnostic ignored"-Warc-retain-cycles"

//循环引用

#pragmaclang diagnostic pop

4.未使用变量警告

#pragmaclang diagnostic push

#pragmaclang diagnostic ignored  "-Wunused-variable"

//未使用的变量

#pragmaclang diagnostic pop

5.内存泄漏警告

#pragmaclang diagnostic push

#pragmaclang diagnostic ignored  "-Warc-performSelector-leaks"

//内存泄漏警告

#pragmaclang diagnostic pop